A design method, device, equipment and product for a flexible protective structure

Abstract

The invention discloses a design method, device, equipment and product of a flexible protective structure. The invention first calculates the load parameters of an air rib tent in its application scenario; then, according to the load parameters, determines its structural data; then, based on the structural data, constructs a finite element analysis model of the air rib tent, so as to obtain its simulated protective performance data; then, the invention obtains its actual protective performance data, and combines the simulated protective performance data to feed back and optimize the finite element analysis model, so as to obtain the optimized finite element analysis model; finally, based on this, the effective protective performance data of the air rib tent can be obtained; thus, the invention feeds back and optimizes the finite element analysis model through the error between the simulation data and the actual data, so as to improve the accuracy of the constructed analysis model; based on this, the accuracy of the simulation is greatly improved, thereby ensuring the reliability of the obtained safety protection performance data.

Description

Technical Field

[0001] The present invention belongs to the technical field of flexible protective structures, and in particular relates to a design method, device, equipment and product of a flexible protective structure. Background Art

[0002] Since the air-ribbed tent has strong protective performance, such as the arched structure can make the structure have good dynamic characteristics, and the flexible large deformation can make the structure effectively protect against wind, rain, snow and explosion impact, etc. At the same time, the structure also has the advantages of being light, easy to transport and low in cost. Therefore, the air-ribbed tent has gradually become a new structural form for temporarily building protective places under harsh outdoor environmental conditions.

[0003] However, it is precisely because of the unique dynamic characteristics of the structure and the large deformation and impact resistance mechanism that the force analysis of the flexible structure becomes a difficult problem in the design and calculation of the structure. Among them, the calculation method of the common air rib tent's wind and snow resistance and other protective performance is: through the finite element analysis method, the stability of the structure under different loads is calculated, and then, through the optimization design, the deformation and stress of the tent top structure are reduced, thereby improving its durability and safety. However, practice shows that the air rib tent designed by the existing finite element analysis calculation method, in the field environment, through the actual measurement of wind speed, wind direction and the deformation of the tent, service life and other parameters, the consistency with the design is only about 60%; therefore, the accuracy of the tent's protective performance data obtained by the existing simulation method is low, and it is impossible to provide accurate data for the verification of the safety protection of the structure; therefore, based on the above-mentioned deficiencies, how to provide a highly accurate design method for flexible protective structures has become a problem to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a design method, device, equipment and product of a flexible protective structure to solve the problem of low accuracy of simulated protective performance data of air rib tents in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a design method for a flexible protective structure is provided, comprising:

[0007] Calculating the load parameters of the target flexible protective structure based on the application scenario of the target flexible protective structure;

[0008] Determining structural data of the target flexible protective structure according to the load parameters;

[0009] Using the structural data of the target flexible protective structure, a finite element analysis model of the target flexible protective structure is established, and based on the finite element analysis model, simulated protection performance data of the target flexible protective structure is obtained;

[0010] Based on the structural data, actual protection performance data of the target flexible protection structure is obtained, and according to the actual protection performance data and the simulated protection performance data, a finite element analysis model of the target flexible protection structure is optimized to obtain an optimized finite element analysis model;

[0011] The optimized finite element analysis model is used to obtain effective protection performance data of the target flexible protection structure, so as to obtain the safety protection performance verification result of the target flexible protection structure based on the effective protection performance data.

[0012] Based on the above disclosed content, the present invention first calculates the load parameters of the target flexible protective structure in its application scenario; then, according to the load parameters, determines its structural data (such as tent shape, air rib size, protective baffle structure and other data); then, based on the structural data, constructs a finite element analysis model of the target flexible protective structure, so as to obtain its simulated protection performance data based on this; then, based on the aforementioned structural data, the present invention obtains its actual protection performance data, and combines the simulated protection performance data to feedback and optimize the finite element analysis model to obtain the optimized finite element analysis model; finally, the effective protection performance data of the target flexible protective structure can be obtained based on the optimized finite element analysis model; thus, the present invention uses the error between the simulation data and the actual data to feedback and optimize the finite element analysis model, so as to improve the accuracy of the constructed analysis model; based on this, the accuracy of the simulation is greatly improved, thereby ensuring the reliability of the obtained safety protection performance data, and therefore, it is very suitable for large-scale application and promotion.

[0013] In a possible design, based on the application scenario of the target flexible protective structure, the load parameters of the target flexible protective structure are calculated, including:

[0014] Based on the application scenario, obtaining the wind resistance level and snow resistance level of the target flexible protective structure;

[0015] According to the wind resistance level, the ambient wind speed is determined, and according to the snow resistance level, the thickness of the covered snow is determined;

[0016] According to the application scenario, the explosion shock wave load and the explosion fragment load of the target flexible protective structure are calculated;

[0017] The load parameters of the target flexible protective structure are generated by using the ambient wind speed, the snow covering thickness, the explosion shock wave load and the explosion fragment load.

[0018] In a possible design, according to the application scenario, the explosion shock wave load of the target flexible protective structure is calculated, including:

[0019] According to the application scenario, obtaining explosion parameters;

[0020] Based on the explosion parameters, the overpressure peak value of the incident shock wave acting on the target flexible protective structure during the ground explosion is calculated;

[0021] Calculating the overpressure action time according to the overpressure peak value of the incident shock wave;

[0022] Utilizing the incident shock wave overpressure peak value, calculating the ground reflected shock wave overpressure peak value acting on the target flexible protective structure during ground explosion;

[0023] Calculating the structural load of the target flexible protective structure during ground explosion according to the overpressure peak value of the ground reflected shock wave and the overpressure action time;

[0024] The explosion shock wave load is obtained by using the overpressure peak value of the ground reflected shock wave and the structural load.

[0025] In a possible design, the explosion parameters include: the distance between the target flexible protective structure and the explosion center point and the amount of explosive TNT charge;

[0026] Among them, based on the explosion parameters, the incident shock wave overpressure peak acting on the target flexible protective structure during the ground explosion is calculated, including:

[0027] According to the following formula (1), the overpressure peak value of the incident shock wave is calculated;

[0028]

[0029] In the above formula (1), P m represents the overpressure peak value of the incident shock wave, W1 represents the explosive TNT charge, R represents the distance between the target flexible protective structure and the explosion center point, and u1 and u2 both represent constants;

[0030] Correspondingly, the peak value of the incident shock wave overpressure is used to calculate the peak value of the ground reflected shock wave overpressure acting on the target flexible protective structure during the ground explosion, which includes:

[0031] According to the following formula (2), the overpressure peak value of the ground reflected shock wave is calculated;

[0032]

[0033] In the above formula (2), P mf represents the overpressure peak value of the ground reflected shock wave, and u3, u4, and u5 all represent constants.

[0034] In a possible design, the explosion parameters include: the amount of explosive TNT charge, wherein the overpressure action time is calculated based on the overpressure peak value of the incident shock wave, including:

[0035] According to the following formula (3), the overpressure action time is calculated;

[0036]

[0037] In the above formula (3), t represents the overpressure action time, P m represents the overpressure peak value of the incident shock wave, W1 represents the explosive TNT charge, and u6 and u7 both represent constants.

[0038] In a possible design, the structural load of the target flexible protective structure during ground explosion is calculated according to the overpressure peak value of the ground reflected shock wave and the overpressure action time, including:

[0039] Obtaining the natural circular frequency and allowable ductility ratio of the structural components of the target flexible protective structure;

[0040] The dynamic coefficient is calculated according to the self-vibration circular frequency, the allowable ductility ratio and the overpressure action time, and according to the following formula (4);

[0041]

[0042] In the above formula (4), K d represents the dynamic coefficient, ω represents the natural circular frequency, [β] represents the allowable ductility ratio, and t represents the overpressure action time;

[0043] The structural load is calculated based on the dynamic coefficient and the overpressure peak value of the ground reflected shock wave.

[0044] In a possible design, based on the finite element analysis model, the simulated protection performance data of the target flexible protection structure is obtained, including:

[0045] According to the finite element analysis model, the target flexible protective structure is subjected to a structural damage factor influence analysis process, so as to obtain a structural damage factor influence analysis result after the structural damage factor influence analysis process, wherein the structural damage factor influence analysis result includes an analysis result of the influence of the rib diameter on the stress performance of the target flexible protective structure, an analysis result of the influence of the air pressure on the stress performance of the target flexible protective structure, and an analysis result of the influence of the air rib spacing on the stress performance of the target flexible protective structure;

[0046] Using the finite element analysis model, a structural load transfer analysis is performed on the target flexible protective structure, so as to obtain a structural load transfer analysis result after the structural load transfer analysis, wherein the structural load transfer analysis result includes a load transfer analysis result of the shock wave on the air column of the target flexible protective structure, a load transfer analysis result of the shock wave on the air column and foundation of the target flexible protective structure, a load transfer analysis result of the air column and foundation under the action of wind load, and an analysis result of the structural action of the explosion fragment load on the target flexible protective structure;

[0047] The simulated protection performance data of the target flexible protective structure is generated by using the structural damage factor impact analysis results and the structural load transfer analysis results.

[0048] In a second aspect, a design device for a flexible protective structure is provided, comprising:

[0049] A load parameter calculation unit, used to calculate the load parameter of the target flexible protective structure based on the application scenario of the target flexible protective structure;

[0050] A tent structure acquisition unit, used to determine the structural data of the target flexible protective structure according to the load parameters;

[0051] A simulation unit, used to establish a finite element analysis model of the target flexible protective structure using the structural data of the target flexible protective structure, and obtain simulated protection performance data of the target flexible protective structure based on the finite element analysis model;

[0052] A feedback optimization unit is used to obtain actual protection performance data of the target flexible protection structure based on the structural data, and optimize the finite element analysis model of the target flexible protection structure according to the actual protection performance data and the simulated protection performance data to obtain an optimized finite element analysis model;

[0053] The simulation unit is also used to use the optimized finite element analysis model to obtain effective protection performance data of the target flexible protection structure, so as to obtain the safety protection performance verification result of the target flexible protection structure based on the effective protection performance data.

[0054] According to a third aspect, another device for designing a flexible protective structure is provided. Taking the device as an electronic device as an example, the device includes a memory, a processor and a transceiver which are communicatively connected in sequence, wherein the memory is used to store a computer program, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute a design method for the flexible protective structure as described in the first aspect or any one of the possible designs in the first aspect.

[0055] In a fourth aspect, a storage medium is provided, on which instructions are stored, and when the instructions are run on a computer, a design method for the flexible protective structure as in the first aspect or any possible design in the first aspect is executed.

[0056] In a fifth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, causes the computer to execute a method for designing a flexible protective structure as described in the first aspect or any possible design in the first aspect.

[0057] Beneficial effects:

[0058] (1) When simulating the air rib tent, the present invention uses the error between the simulation data and the actual data to feedback and optimize the finite element analysis model of the air rib tent, thereby improving the accuracy of the constructed analysis model; based on this, the accuracy of the simulation is greatly improved, thereby ensuring the reliability of the safety protection performance data obtained, and therefore, it is very suitable for large-scale application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A schematic flow chart of the steps of a design method for a flexible protective structure provided by an embodiment of the present invention;

[0060] Figure 2 A schematic diagram of the effect of a full-scale finite element model provided by an embodiment of the present invention;

[0061] Figure 3 A schematic diagram of the effect of the masking reservoir displacement inspection point provided by an embodiment of the present invention;

[0062] Figure 4 A comparison diagram of the effect of the air rib spacing on the displacement of the tent in the x-direction provided by an embodiment of the present invention;

[0063] Figure 5 A comparison diagram of the effect of the air rib spacing on the displacement of the tent in the y direction provided by an embodiment of the present invention;

[0064] Figure 6 A comparison diagram of the effect of the air rib spacing on the displacement of the tent in the z direction provided by an embodiment of the present invention;

[0065] Figure 7 A schematic diagram showing a comparison of the maximum displacements in the x, y and z directions provided in an embodiment of the present invention;

[0066] Figure 8 The first Mi ses stress cloud diagram of the gas rib under the impact of explosion provided by the embodiment of the present invention;

[0067] Fig. 9 A second Mi ses stress cloud diagram of the gas rib under the impact of explosion provided by an embodiment of the present invention;

[0068] Fig.10 The third Mi ses stress cloud diagram of the gas rib under the impact of explosion provided by the embodiment of the present invention;

[0069] Fig.11 The Mi ses stress cloud diagram of the tension belt caused by the explosion impact provided in the embodiment of the present invention;

[0070] Fig.12 A schematic diagram of a pull belt reaction force-action time curve provided by an embodiment of the present invention;

[0071] Fig.13 The fragment arrival time and fragment action completion time at different distances from the explosion center to the shelter provided by the embodiment of the present invention;

[0072] Fig.14 The shock wave arrival and action completion time at different distances from the explosion center to the shelter provided by the embodiment of the present invention;

[0073] Fig.15 A schematic diagram of the explosion test site layout of a scaled model of an air rib tent provided in an embodiment of the present invention;

[0074] Fig.16 A schematic diagram of the order of naming the drawstrings provided in an embodiment of the present invention;

[0075] Fig.17 A schematic diagram of the structure of a design device for a flexible protective structure provided by an embodiment of the present invention;

[0076] Fig.18 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0077] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0078] Example:

[0079] See also Figure 1 As shown, the design method of the flexible protective structure provided in the present embodiment (which can be generally understood as a performance simulation design method of a flexible protective structure (i.e., an air rib tent), that is, using simulation processing means to obtain effective protective performance data of the flexible protective structure, so that protection verification and the production of the air rib tent can be carried out based on this in the future) calculates the load parameters of the air rib tent by setting usage scenario conditions such as wind, snow, and explosion impact; then, according to the load parameters, the structural data of the air rib tent is determined, and based on this, the corresponding finite element analysis model is established; then, based on the finite element analysis model, the simulated protective performance data of the air rib tent is obtained; then, the actual protective performance data is obtained, and combined with the aforementioned simulated protective performance data, the finite element analysis model is optimized to obtain feedback. to the optimized finite element analysis model; finally, the simulation of the safety protection performance of the air rib tent can be completed based on the optimized finite element analysis model; thus, the method uses the error between its simulation data and the actual data to feedback and optimize the finite element analysis model of the air rib tent, so that the accuracy of the constructed analysis model can be improved; based on this, the accuracy of the simulation is greatly improved, thereby ensuring the reliability of the obtained safety protection performance data, and therefore, it is very suitable for large-scale application and promotion; among them, for example, the method can be but not limited to running on the performance simulation end side, optionally, the performance simulation end can be but not limited to a personal computer, it can be understood that the aforementioned execution subject does not constitute a limitation on the embodiments of the present application, and accordingly, the operation steps of the method can be but not limited to the following steps S1 to S5.

[0080] S1. Based on the application scenario of the target flexible protective structure, calculate the load parameters of the target flexible protective structure; in this embodiment, step S1 is essentially to set the application scenario of the target flexible protective structure (i.e., the air rib tent), and then, under the application scenario, calculate the tent load; among them, for example, but not limited to, the following steps S11 to S14 can be used to calculate the load parameters of the air rib tent.

[0081] S11. Based on the application scenario, the wind resistance level and snow resistance level of the target flexible protective structure are obtained; in this embodiment, the wind resistance and snow resistance levels under different application scenarios are stored in the performance simulation terminal for example, so when in use, it can be matched according to the input application scenario; of course, it can also be input by the user, that is, the performance simulation terminal obtains the aforementioned wind resistance level and snow resistance level when responding to the scene input human-computer interaction operation; in this way, after obtaining the wind resistance level and snow resistance level, the ambient wind speed and snow thickness to which the air rib tent is subjected can be determined based on this, and the process is shown in the following step S12.

[0082] S12. Determine the ambient wind speed according to the wind resistance level, and determine the thickness of the covered snow according to the snow resistance level. In specific implementation, the ambient wind speeds corresponding to different wind resistance levels and the thickness of the covered snow corresponding to different snow resistance levels are stored in the performance simulation terminal for example. Therefore, data matching can be performed based on the wind resistance level and snow resistance obtained in the aforementioned step S11 to obtain the corresponding ambient wind speed and snow thickness.

[0083] After obtaining the ambient wind speed and snow thickness in the corresponding application scenario, this embodiment also takes into account the explosion-resistant impact scenario of the air rib tent. Therefore, it is also necessary to calculate its load in the explosion-resistant impact scenario. The calculation process can be but is not limited to the following step S13.

[0084] S13. According to the application scenario, the explosion shock wave load and explosion fragment load of the target flexible protective structure are calculated; in the specific implementation, the explosion shock wave load is calculated based on the ground explosion of the low-resistance blasting bomb at a set distance from the shelter (i.e., the air rib tent), that is, the reflected shock wave overpressure generated by the shock wave acting on the structure of the air rib tent after the explosion is the shock wave load directly acting on the structure; wherein, this embodiment uses the equivalent static load method to perform equivalent calculation of the shock wave load according to the elastic-plastic system to obtain the load design value on the structure, thereby utilizing the aforementioned reflected shock wave overpressure and load design value as the explosion shock wave load.

[0085] Optionally, the aforementioned calculation process may be but is not limited to the following steps S13a to S13f.

[0086] S13a. According to the application scenario, explosion parameters are obtained; in specific implementation, the explosion parameters may include, but are not limited to: the distance between the target flexible protective structure and the explosion center point and the amount of TNT charge for the explosion. Of course, the aforementioned data are all preset parameters and can be directly pre-stored in the performance simulation terminal.

[0087] After the explosion parameters are obtained, the incident shock wave overpressure peak value acting on the target flexible protective structure during the ground explosion can be calculated, so that the reflected shock wave overpressure peak value can be calculated based on the incident shock wave overpressure peak value; wherein, the calculation process of the incident shock wave overpressure peak value can be but is not limited to as shown in the following step S13b.

[0088] S13b. Based on the explosion parameters, the incident shock wave overpressure peak value acting on the target flexible protective structure during the ground explosion is calculated; in specific applications, the incident shock wave overpressure peak value can be calculated according to, for example but not limited to, the following formula (1).

[0089]

[0090] In the above formula (1), P m represents the overpressure peak value of the incident shock wave, W1 represents the explosive TNT charge, R represents the distance between the target flexible protective structure and the explosion center, and u1 and u2 both represent constants; in this embodiment, for example, u1 and u2 can be set to 1.316 and 0.369 respectively, but are not limited to.

[0091] In this way, based on the above formula (1), the incident shock wave overpressure peak value can be calculated; then, the overpressure action time and the ground reflected shock wave overpressure peak value can be calculated based on the incident shock wave overpressure peak value, wherein the calculation process of the above two parameters can be but is not limited to as shown in the following steps S13c and S13d.

[0092] S13c. Calculate the overpressure action time based on the overpressure peak value of the incident shock wave; in specific applications, the overpressure action time can be calculated by, for example but not limited to, using the following formula (3).

[0093]

[0094] In the above formula (3), t represents the overpressure action time, P m represents the overpressure peak value of the incident shock wave, W1 represents the explosive TNT charge, and u6 and u7 both represent constants; in this embodiment, for example, u6 and u7 can be set to 1.27 and 1.63 respectively, but are not limited to.

[0095] After the overpressure action time is calculated by the above formula (3), the overpressure peak value of the ground reflected shock wave can be calculated, and the process is shown in the following step S13d.

[0096] S13d. Using the incident shock wave overpressure peak value, calculate the ground reflected shock wave overpressure peak value acting on the target flexible protective structure when the ground explodes; in the specific implementation, for example, but not limited to the following formula (2), to calculate the ground reflected shock wave overpressure peak value;

[0097]

[0098] In the above formula (2), P mf It represents the overpressure peak value of the ground reflected shock wave, and u3, u4, u5 all represent constants; optionally, for example, u3, u4, u5 can be set to 2, 6 and 0.7 respectively but not limited to.

[0099] Thus, based on the aforementioned formulas (2) and (3), after calculating the overpressure peak value and overpressure action time of the ground reflected shock wave, the two can be combined to calculate the structural load (i.e., the aforementioned load design value); wherein, the structural load calculation process can be, but is not limited to, as shown in the following step S13e.

[0100] S13e. According to the overpressure peak value of the ground reflected shock wave and the overpressure action time, the structural load of the target flexible protective structure during the ground explosion is calculated; in this embodiment, the natural circular frequency and the allowable ductility ratio of the structural components of the target flexible protective structure are first obtained; then, the dynamic coefficient is calculated according to the natural circular frequency, the allowable ductility ratio and the overpressure action time; finally, the structural load can be calculated according to the dynamic coefficient and the above-mentioned ground reflected shock wave overpressure peak value.

[0101] Optionally, the calculation principle of the dynamic coefficient is: according to the equivalent static load method, the dynamic load can be equivalent to the static load for calculation, that is, considering the arch support structure of the air rib tent, it is sufficient to ensure that the passage of internal equipment is not affected after large deformation. Therefore, this embodiment performs load calculation according to the elastic-plastic structure; based on this, the explosion dynamic load waveform generated by the explosion can be simplified to a triangular load with no boost time. At this time, the aforementioned dynamic coefficient can be calculated based on the natural vibration original frequency and the allowable ductility ratio of the structural components of the air rib tent.

[0102] Furthermore, the power coefficient can be calculated by, for example but not limited to, using the following formula (4).

[0103]

[0104] In the above formula (4), K d represents the dynamic coefficient, ω represents the natural circular frequency, [β] represents the allowable ductility ratio, and t represents the overpressure action time.

[0105] In this way, after calculating the dynamic coefficient, the structural load can be calculated based on the dynamic coefficient and the above-mentioned ground reflected shock wave overpressure peak value; wherein, since the surface of the tent structure to be simulated in this embodiment is provided with a protective baffle, the surface of the tent can be regarded as a rigid wall; based on this, the product of the dynamic coefficient and the ground reflected shock wave overpressure peak value can be directly used as the structural load.

[0106] Based on this, after the structural load is calculated based on the aforementioned step S13e, the explosion shock wave load can be obtained by combining the aforementioned ground reflected shock wave overpressure peak value, and the process can be but is not limited to as shown in the following step S13f.

[0107] S13f. The explosion shock wave load is obtained by using the overpressure peak value of the ground reflected shock wave and the structural load. In this embodiment, the explosion shock wave load can be directly composed of the overpressure peak value of the ground reflected shock wave and the structural load. Of course, the structural load can also be directly used as the explosion shock wave load. Either one of the two can be selected.

[0108] Thus, through the aforementioned steps S13a to S13f, the explosion shock wave load of the air rib tent can be calculated; and then, the corresponding explosion fragment load needs to be calculated so as to determine the protective material of the protective baffle on the surface of the tent based on it.

[0109] Among them, the blasting parameters mentioned in the example also include projectile parameters, and the projectile parameters can include but are not limited to the average thickness of the shell, the average inner diameter of the shell, the weight of the projectile charge and the weight of the shell; therefore, this embodiment determines the explosive fragment load based on the above data; optionally, the explosive fragment load is determined from two aspects: the fragment load mass and the fragment penetration speed.

[0110] In a specific implementation, for example but not limited to, the following steps S13g to S13j may be used to calculate the fragment load mass and the fragment penetration speed.

[0111] S13g. Determine the intermediate blasting parameters and the initial velocity of the fragments according to the projectile parameters; in specific applications, for example, but not limited to, calculating the intermediate blasting parameters according to the average thickness of the shell and the average inner diameter of the shell, and calculating the initial velocity of the fragments using the weight of the projectile charge and the weight of the shell.

[0112] Optionally, one of the two calculation methods is disclosed below:

[0113] In this embodiment, the blasting intermediate parameters can be calculated by, for example but not limited to, using the following formula (5).

[0114]

[0115] In the above formula (5), M represents the intermediate parameter of blasting, t c represents the average thickness of the shell, d i represents the average inner diameter of the cartridge case, B x Represents the explosion constant; wherein the aforementioned intermediate explosion parameter is essentially the weight distribution of the fragments, which is used for the subsequent calculation of the fragment load mass.

[0116] Thus, based on the aforementioned formula (5), the intermediate parameters of the blasting can be calculated, and then the initial velocity of the fragments can be calculated, wherein the initial velocity of the fragments can be calculated, for example but not limited to, according to the following formula (6).

[0117]

[0118] In the above formula (6), V0 represents the initial velocity of the fragments, W represents the charge weight of the projectile, and W c represents the weight of the cartridge case, wherein G represents an explosion energy constant (i.e., Gurney explosion energy constant), and a, c, and δ all represent constants; in a specific implementation, for example, a, c, and δ may be, but are not limited to, 304.8, 1, and 0.5, respectively.

[0119] Thus, based on the aforementioned formula (6), the initial velocity of the fragments can be calculated; then, with the help of the intermediate explosion parameters and the initial velocity of the fragments, the fragment load mass and the fragment penetration velocity of the protective baffle on the air rib tent at different explosion confidence levels (i.e., the maximum mass of the fragments generated when the projectile explodes, and the penetration velocity of the protective baffle) can be calculated; wherein, the specific calculation process of the fragment load mass can be, but is not limited to, as shown in the following step S13h.

[0120] S13h. Based on the intermediate blasting parameters, the fragment load masses of the protective baffle of the air rib tent at different blasting confidences are calculated, wherein the blasting confidence is used to characterize the probability that different fragment load masses are the maximum weight of fragments produced by the explosion; in specific implementation, the blasting confidence essentially characterizes the designed fragment load mass (i.e., the fragment design weight), which is the probability of the maximum weight of the generated fragments during the explosion, and therefore, by substituting different blasting confidences, the fragment load masses at different blasting confidences can be calculated; wherein, since the calculation process of the fragment load mass is the same at each blasting confidence, any blasting confidence is taken as an example for specific explanation below.

[0121] Optionally, for any blasting confidence, the fragment load mass of the protective baffle of the air rib tent under any blasting confidence can be calculated according to, for example but not limited to, the following formula (7).

[0122] W f =Mln2 (1-CL)×γ (7)

[0123] In the above formula (7), W f represents the fragment load mass of the protective baffle of the air rib tent under any of the blasting confidences, M represents the blasting intermediate parameter, CL represents any of the blasting confidences, and γ represents a constant; wherein, in this embodiment, γ can be, but is not limited to, 28.3495231.

[0124] In this way, by substituting different blasting confidences into the aforementioned formula (7), the fragment load mass of the protective baffle of the air rib tent at different blasting confidences can be calculated; and after calculating multiple fragment load masses, the aforementioned fragment initial velocity can be combined to calculate the fragment penetration velocity of the protective baffle of the air rib tent at different blasting confidences, and the process can be but is not limited to the following step S13i.

[0125] S13i. According to the initial velocity of the fragments and the fragment load mass of the protective baffle of the air rib tent at different blasting confidences, the fragment penetration velocity of the protective baffle of the air rib tent at different blasting confidences is calculated; in the specific implementation, any blasting confidence is taken as an example for explanation, wherein the example can be but is not limited to the following formula (8) to calculate the fragment penetration velocity of the protective baffle of the air rib tent at any blasting confidence.

[0126]

[0127] In the above formula (8), V S represents the penetration velocity of the fragments of the protective baffle of the air rib tent under any blasting confidence, V0 represents the initial velocity of the fragments, W f represents the fragment load mass of the protective baffle of the air rib tent under any of the above blasting confidence levels, where S represents the fragment flight distance, and γ, φ are both constants; in this embodiment, the aforementioned fragment penetration speed is equivalent to the fragment penetration speed after the fragment flies S distance, and for example γ, φ are set to 0.3048, 28.3495231 and 0.333 respectively.

[0128] Therefore, through the aforementioned formula (8), the fragment penetration speed of the protective baffle of the air rib tent under different blasting confidences can be calculated; then, combined with the fragment load mass calculated above, the explosion fragment load of the protective baffle of the air rib tent can be generated, and the process can be but not limited to as shown in the following step S13j.

[0129] S13j. The explosion fragment load is composed of the fragment load mass and fragment penetration speed of the protective baffle of the air rib tent at different blasting confidence levels.

[0130] Thus, based on the aforementioned steps S13g to S13j, the bursting disc load can be determined, and then the load parameters of the air rib tent can be generated based on the aforementioned calculated load data, and the process can be but not limited to as shown in the following step S14.

[0131] S14. Generate load parameters of the target flexible protective structure using the ambient wind speed, the snow cover thickness, the explosion shock wave load, and the explosion fragment load.

[0132] Therefore, after the load parameters of the air rib tent are calculated through the aforementioned steps S11 to S14, the structural form of the air rib long slope can be determined based on the load parameters. The process can be but is not limited to the following step S2.

[0133] S2. According to the load parameters, the structural data of the target flexible protective structure are determined; in the present embodiment, the structural shape of the air rib tent is determined according to the aforementioned ambient wind speed, the thickness of the covered snow, the explosion shock wave load and the explosion fragment load, and then the size data of a single air rib is determined; then, the tent tarpaulin data, the connection method between the air rib and the tarpaulin and the foundation of the tent are determined; finally, the specification parameters and plate structure of the protective baffle can be determined, and the protective material of the protective baffle can be determined according to the aforementioned explosion fragment load; in this way, the aforementioned data can be used to form the structural data of the air rib tent.

[0134] Among them, the above-mentioned load parameters can be sent to the design terminal for visual display, so that the designer corresponding to the design terminal can determine the above-mentioned structural shape, tent tarpaulin data, the connection method between the air ribs and the tarpaulin, and the foundation of the tent based on the load parameters; and then, upload it to the performance simulation end through the design terminal; in this way, the performance simulation end can obtain the structural shape of the air-rib tent, tent tarpaulin data, the connection method between the air ribs and the tarpaulin, and the foundation of the tent during data transmission interaction.

[0135] Furthermore, according to the quality, breaking strength, tearing strength, anti-adhesion, hydrostatic pressure, flame retardancy, color fastness to light, color fastness to friction, weather resistance and other performance parameters of the tarpaulin, 250D filament 3-strand twisting, the monofilament draft ratio is not less than 3, and the tarpaulin is manufactured by orthogonal weaving in the form of one warp and one weft using a weaving process. At the same time, the isotropic characteristics of the base fabric in the warp and weft directions are maintained, which can facilitate cutting and cutting, thereby improving the utilization efficiency of the tarpaulin material; in addition, a PU-type coating formula system is selected to meet the waterproof and breathable requirements of the tarpaulin material, and on this premise, a halogen-free flame retardant is selected to achieve the flame retardant effect of the tarpaulin.

[0136] Furthermore, for example, the connection method between the aforementioned air rib and the tarpaulin is: a binding connection method, that is, the outer strap is sewn and fixed to the inner layer of the tarpaulin, and the two ends of the strap are sewn together; at the same time, different foundations can be set according to actual usage scenarios. For example, when the foundation soil type is rock and concrete, a foundation of sandbag compaction + pull rope + chemical anchor bolts is adopted; for another example, when the foundation soil type is stone soil and clay, a foundation of sandbag compaction + pull rope + spiral piles is adopted. Of course, the foundations of other sites will not be described one by one.

[0137] In addition, for example, the overall connection of the tent adopts a steel frame structure, the steel frame structure adopts Q235 steel, and the steel frame structure is fixed to the foundation; in this way, the stability and strength of the tent can be guaranteed.

[0138] In a specific implementation, the dimensional data of a single air rib is obtained in the following manner: wherein, the single air rib can be regarded as a thin-walled circular ring with a length of XXXXXmm, an outer diameter of D=XXXmm, and a wall thickness of X.XXmm. Therefore, it can be set to withstand an internal pressure of p=0.XMPa (relative pressure), and then, based on this, the aforementioned parameters such as length, outer diameter and wall thickness can be reversed; of course, the specific parameters of the aforementioned single air rib are not given as examples in this embodiment.

[0139] In the specific implementation, when determining the optimal material of the protective baffle, its specification parameters need to be determined first. In this embodiment, the rule parameters are determined according to the total outer protection area of ​​the flexible protective structure and the set total mass of the protective baffle. The process is as follows:

[0140] The first step: obtain the single-person carrying weight, and determine the actual weight of the protective baffle based on the single-person carrying weight; in this embodiment, the single-person carrying weight is a preset value. Therefore, considering the actual application, it should be ensured that the actual weight of the protective baffle is less than or equal to the single-person carrying weight. Optionally, a weight fluctuation range can be set, and then, based on the single-person carrying weight, the weight fluctuation range can be reduced to serve as the actual weight of the protective baffle.

[0141] After the actual weight is obtained, the surface density of the protective imitation plate can be determined, and the process is shown in the following steps.

[0142] Step 2: Based on the total outer protection area and the set total mass, determine the surface density of the protective baffle. In this embodiment, the surface density of the protective baffle can be, but is not limited to, the ratio of the set total mass to the total outer protection area. Then, based on this, its area and size can be determined, as shown in the following step 3.

[0143] Step 3: Determine the area and size of the protective baffle according to the surface density of the protective baffle; in specific applications, the protective baffle adopts a rectangular structure, so its size is the length and height; wherein, the above-mentioned size can be determined by permutation and combination; further, the length and height are usually multiples of 10, of course, the above-mentioned example is only for illustration and is not limited to this.

[0144] After the actual weight, area and size of the protective baffle are determined through the aforementioned steps, the specification parameters of the protective baffle can be generated based on the actual weight, area and size of the protective baffle. The process can be, but is not limited to, as shown in the fourth step below.

[0145] Step 4: Using the actual weight, area and size of the protective baffle, form the specification parameters of the protective baffle.

[0146] In this way, after determining the specification parameters of the protective baffle based on the aforementioned steps, the protective baffle can be simulated in combination with the aforementioned blast fragment load to determine its corresponding blasting test method, so that a blasting penetration test can be carried out based on the determined blasting test method, and then the optimal protective material can be determined based on the blasting penetration test; wherein the simulation process is shown in the following fifth step.

[0147] Step 5: Use the blasting fragment load and specification parameters to preset the plate structure, and perform blasting simulation processing on the protective baffle, so as to obtain the blasting test method of the protective baffle after the blasting simulation processing, and visualize the blasting test method, so that the user can perform blasting penetration tests on several protective samples corresponding to the protective baffle according to the blasting test method to obtain the blasting penetration test data of each protective sample; in this embodiment, the blasting simulation processing is realized according to the blasting fragment load and specification parameters of the protective baffle, and the finite element analysis software LS-DYNA is used for modeling, wherein, in the simulation When simulating the protective baffle, on the basis of the aforementioned blast fragment load and rule parameters, the aforementioned preset plate structure is selected (specifically, the panel material is SiC ceramic, the supporting layer is glass fiber board, and the back plate is PE board, that is, the structure of SiC ceramic-glass fiber board-PE board) as the intrinsic performance parameter of the protective baffle during simulation, and No. 45 steel is set as the intrinsic performance parameter of the high-speed fragment. Then, the penetration effect is analyzed from different incident angles, so as to obtain different analysis results, so as to determine the incident angle of the protective baffle according to the analysis results, and use the incident angle as the blasting test method.

[0148] Through the analysis of the penetration effect, it can be seen that when the incident angle is 90 degrees, the degree of penetration damage is greater and the back bulge is more obvious; at the same time, under the simulation analysis, it can be clearly seen that under the same penetration time, the vertically incident fragments have a greater penetration depth and a stronger destructive ability, while the obliquely incident fragments have a relatively slow penetration speed and a longer path, and the destructive ability is significantly reduced. Under the structural simulation conditions, no complete penetration occurs.

[0149] Correspondingly, when conducting simulation analysis, it can also be concluded that the speed of obliquely incident fragments slowly decreases over a longer period of time, while the speed of vertically incident fragments decreases rapidly and then penetrates the target; therefore, through the aforementioned finite element simulation, it can be seen that the destructive ability of vertically incident (i.e., the incident angle is 90 degrees) high-speed fragments to the protective baffle is much higher than that of oblique incident fragments; therefore, the vertical incidence method can be used as the blasting test method for the protective baffle, that is, the vertical incidence method is selected to carry out the blasting penetration test; in this way, when the protective baffle achieves complete protection against high-speed fragments, it can meet the protection needs of various angles of penetration with maximum performance.

[0150] Based on this, the aforementioned blasting test method is visualized, so that users can conduct blasting penetration tests in this way, thereby obtaining corresponding test data; in specific implementation, different materials are selected according to the composite basic structure of the protective baffle and the surface density requirements. Among them, this embodiment selects samples of different schemes such as SiC+carbon plate+PE, B4C+carbon plate+PE, SiC+fiberboard+PE, etc. to conduct blasting penetration tests, thereby obtaining blasting penetration test data of different protective samples; then, the aforementioned blasting penetration test data is uploaded to the performance simulation end, and the optimal protective material can be determined; among them, this embodiment is based on According to the blasting penetration test data of each protective sample, the protective samples that meet the blasting protection performance are screened out from the various protective samples; then, the cost corresponding to each screened protective sample is obtained, and finally, the protective material corresponding to the protective sample with the lowest cost is used as the optimal material for the protective baffle; in this way, after the optimal material of the protective baffle is determined, the optimal material, the specification parameters determined in the above steps and the above preset sample structure can be used as the structural data of the protective baffle, thereby forming the structural data of the air rib tent together with the structural shape of the above-mentioned air rib tent, the tent tarpaulin data, the connection method between the air ribs and the tarpaulin and the foundation of the tent.

[0151] Therefore, after the structural data of the air rib tent is determined through the aforementioned step S2, a performance simulation process may be performed, and the process may be, but is not limited to, as shown in the following step S3.

[0152] S3. Using the structural data of the target flexible protective structure, a finite element analysis model of the target flexible protective structure is established, and based on the finite element analysis model, the simulated protective performance data of the target flexible protective structure is obtained; in this embodiment, the finite element analysis model is established in accordance with the steps of determining the modeling order, selecting the ABAQUS solver and dimensions, setting the analysis steps, establishing interactions, setting loads, dividing the grid, submitting analysis and post-processing; and then, the protective performance analysis is performed based on the finite element analysis model.

[0153] Among them, first, according to the finite element analysis model, the target flexible protective structure is subjected to a structural damage factor analysis, so as to obtain a structural damage factor analysis result after the structural damage factor analysis; then, the finite element analysis model is used to perform a structural load transfer analysis on the target flexible protective structure, so as to obtain a structural load transfer analysis result after the structural load transfer analysis.

[0154] Optionally, the analysis results of the impact of the structural damage factors mentioned above may include but are not limited to: analysis results of the impact of rib diameter on the stress-bearing performance of the target flexible protective structure, analysis results of the impact of air pressure on the stress-bearing performance of the target flexible protective structure, and analysis results of the impact of air rib spacing on the stress-bearing performance of the target flexible protective structure.

[0155] Optionally, the following is a detailed description of the simulation:

[0156] In order to analyze the failure mechanism and load transfer law of the air rib tent under the action of explosion impact load and other loads, this embodiment establishes its corresponding finite element analysis model, that is, the full-scale finite element model, which can be seen in Figure 2 As shown, with the help of this model, we can analyze the influence of factors such as rib diameter, air pressure in air rib column, and air rib spacing on the failure mode of the tent structure, and derive the load transfer law under the action of shock wave and other loads.

[0157] Among them, the influence of rib diameter on the mechanical performance of target flexible protective structure is analyzed:

[0158] Through simulation analysis, it can be seen that if the rib diameter of the arch is too large, it will affect the use space and be unsightly, easy to leak, and increase the difficulty of cutting the membrane material; if the rib diameter of the arch is too small, the bearing capacity and stiffness are difficult to meet the use requirements, and it is easy to be overloaded or deformed too much; and when the rib diameter increases, the buckling load of the inflatable arch structure increases accordingly, and as the rib diameter increases, the buckling load of the inflatable arch structure increases faster and faster; therefore, it can be concluded that for the inflatable arch structure with a large rib diameter, increasing the rib diameter is more effective. At the same time, the stiffness, unit stress and displacement of the corresponding vault node of the inflatable arch structure during buckling also increase with the increase of the rib diameter.

[0159] Similarly, the analysis results of the influence of air pressure on the mechanical performance of the target flexible protective structure can also be obtained through simulation, namely:

[0160] The air pressure of the inflatable arch depends on the strength of the membrane material, hot melt and wire strength, the air pressure that the air pump can provide, the bearing capacity and stiffness requirements; according to the existing membrane materials, hot melt and technology, the air pressure of the inflatable arch has a maximum value. Once this value is exceeded, not only the arch structure is prone to burst, but also the air pump pressure is difficult to meet the requirements, making inflation more difficult; at the same time, with the increase of the air pressure of the inflatable arch structure, the buckling load, stiffness, displacement of the arch node during buckling and the initial stress of the unit of the inflatable arch structure all increase, and the simulation finds that with the increase of air pressure, the buckling load of the inflatable arch structure increases faster and faster; therefore, increasing the air pressure of the inflatable arch structure of the high-pressure system is more effective than increasing the air pressure of the low-pressure system.

[0161] Furthermore, for the analysis of the influence of the air rib spacing on the stress performance of the target flexible protective structure, this embodiment uses finite element model analysis to obtain its unfavorable position, that is, taking the two sides of the air rib as the inspection points, the displacement changes of the inspection points in various directions under the explosion impact of the shelter with different air rib spacings are analyzed; among them, the effect schematic diagram of the displacement inspection point of the shelter (i.e., the air rib tent) can be seen in Figure 3 As shown; this embodiment selects different air rib spacings to compare the displacement differences at the same inspection point, thereby obtaining the analysis results of the influence of the air rib spacing on the stress performance of the target flexible protective structure.

[0162] Specifically, the effect of air rib spacing on tent displacement is as follows: Figure 4-Figure 6 As shown, Figure 4 This is a comparison diagram of the displacement effect in the x direction; Figure 5 is a comparison diagram of the displacement effect in the y direction, and Figure 6 This is the displacement effect comparison diagram in the z direction; Figure 4 It can be seen that in the explosion impact of the detonation of explosives, the displacement in the x direction of the inspection point gradually increases. The displacement trend in the x direction of the air ribs with different spacings is consistent during the explosion impact. In the first half of the explosion impact, the tents with air rib spacing of 760mm and 950mm have a displacement in the positive x direction at the inspection point, and in the second half of the explosion impact, the tents with air rib spacing of 760mm and 950mm have a displacement in the negative x direction at the inspection point. This is because in the first half of the explosion impact, the shock wave acts on the inspection point before the x-negative z direction, and the inspection point receives a positive thrust in the x direction. In the second half of the explosion impact, it can be seen from the finite element simulation results that the stress of the tarpaulin between the air ribs on both sides is the largest, so the explosion impact at this point is the largest, resulting in a thrust spreading to the surroundings at this point in the second half of the explosion impact. Therefore, the inspection point has a displacement in the negative x direction in the second half of the explosion impact.

[0163] Similarly, by Figure 5 It can be seen that in the explosion impact of explosive detonation, the displacement in the y direction of the observation point gradually increases, and the displacement trend in the y direction of the gas ribs with different spacings is consistent during the explosion impact process. Figure 5 It can be seen that the air rib spacing has an effect on the air rib y-direction displacement, and as the air rib spacing decreases, the displacement of the tarpaulin in the negative y direction gradually increases, and Figure 5 The distance between the two different air ribs has little effect on the displacement of the tarpaulin in the y direction.

[0164] At the same time, through Figure 6 It can be seen that in the explosion impact of explosive detonation, the displacement of the observation point in the z direction gradually increases. The displacement trend of the gas ribs with different spacings in the z direction is consistent during the explosion impact process, and Figure 6 It can be seen that the air rib spacing has an impact on the air rib displacement in the z direction, that is, with the increase of the air rib spacing, the displacement of the tarpaulin in the z direction gradually increases, and the air rib spacing has a greater impact on the displacement of the tarpaulin in the z direction.

[0165] In addition, this embodiment also provides a schematic diagram of the maximum displacement comparison in the x, y, and z directions under different air rib spacings, see Figure 7 Therefore, through the aforementioned Figure 4-Figure 7 , we can obtain the analysis results of the influence of the air rib spacing on the mechanical performance of the tent.

[0166] After completing the explanation of the impact of structural damage factors on the analysis results, the structural load transfer analysis process is given below.

[0167] Among them, example structural load transfer analysis results may include but are not limited to: load transfer analysis results of shock waves on the air column of the target flexible protective structure, load transfer analysis results of shock waves on the air column and foundation of the target flexible protective structure, load transfer analysis results of the air column and foundation under wind load, and analysis results of the structural effect of explosion fragment load on the target flexible protective structure.

[0168] Among them, this embodiment is still based on the above-mentioned full-scale model finite element analysis model for analysis; specifically, the side shock wave load is used to analyze the transfer and distribution law of the entire tent load under the load.

[0169] Analysis of load transfer of shock wave to the air column of target flexible protective structure:

[0170] From the above analysis results of the air rib spacing, it can be seen that the explosion shock wave first acts on the tarpaulin, and the tarpaulin then transfers the load to the air ribs and the drawstrings; during the finite element simulation, the drawstrings and the tarpaulin produce large deformations under the action of the shock wave, and the deformation value reaches the material damage limit; the experimental phenomena observed after the explosion show that only the cracking and damage of the tarpaulin is observed, and no fracture and damage is observed at the drawstring part connecting the tarpaulin during the explosion impact process. This is because when the finite element analysis model is modeled, the connection boundary condition between the drawstring and the foundation is set as a fixed boundary condition, which is consistent with the initial assumption of the experiment. However, the observation results of the on-site experimental phenomena after the experiment show that the bolts connecting the drawstring and the foundation are pulled out of the soil under the action of the explosion impact load, and because the data value is not measured during the experiment, the boundary conditions of the finite element analysis model are not revised during the finite element simulation analysis; however, the comparative analysis results show that the drawstring is subjected to a large tensile force when subjected to the explosion impact load, and this load is transferred to the bolts connected to the foundation, so ensuring the connection performance of the foundation and the bolts helps to improve the overall stability of the structure.

[0171] Based on this, this embodiment provides a Mi ses stress cloud diagram of the gas rib under the impact of explosion, and its schematic diagram can be seen in Figure 8-Figure 10 As shown ( Figure 8-Figure 10 The stress diagrams are respectively corresponding to 1 / 3 explosion time, 2 / 3 explosion time and 13 / 3 explosion time); It can be seen from the stress cloud diagram that the bearing force action line of the membrane surface is along the normal direction of the membrane surface. When the external load is evenly distributed along the normal direction of the membrane surface, the membrane surface tension will be evenly reduced, and the deformation of the membrane surface will only undergo a small uniform change; when the external load is unevenly distributed, the shape of the membrane surface will change significantly to reduce the room volume and increase the internal and external pressure difference to balance the external load; however, since the stiffness of the flexible membrane material is very small, the load cannot be transferred to a larger range, and the local deformation and strain of the membrane material will be relatively large, resulting in stress concentration, which may cause the membrane material to tear. At this time, the load transfer and distribution law applied by the tarpaulin on the air column will change.

[0172] Analysis of load transfer of shock waves to the air column and foundation of the target flexible protective structure:

[0173] In this embodiment, a Mi ses stress cloud diagram is established for the drawstring of the tent for analysis, such as Fig.11 As shown by Fig.11 It can be seen that the maximum reaction force of the pull belt occurs at the air ribs at both ends; at the same time, see Fig.16 As shown, this embodiment will Fig.16 The red pull belt is named No. 1, and the rest of the pull belts are named counterclockwise. Under the impact of the shock wave load, the curve of the pull belt reaction force changing with time is as follows: Fig.12 As shown, from Fig.12The maximum reaction force of the tie can be obtained, and this maximum reaction force is the load exerted by the tie on the foundation studs.

[0174] Similarly, for the load transfer analysis between the air column and the foundation under load:

[0175] In this embodiment, the standard value of wind load of the target flexible protective structure is determined according to the basic wind pressure, namely:

[0176] w k =β z μ s μ z w0 (9)

[0177] In the above formula (9), w k represents the standard value of wind load, β z ,μ s ,μ z , w0 represents the wind vibration coefficient, wind load body shape coefficient, wind pressure height variation coefficient and basic wind pressure in turn, where the aforementioned β z ,μ s ,μ z They are 1, 1.3 and 1.9 respectively.

[0178] In this way, after calculating the standard value of wind load, it can be used to analyze the most unfavorable load of each connecting component in the tent; this embodiment still generates the Mi ses stress cloud diagram of each connecting member (i.e., air rib, tarpaulin, etc.) at the moment of maximum stress; then, according to the aforementioned stress cloud diagram, the most unfavorable load of each connection is analyzed; among them, this embodiment analyzes and concludes that: the vertical end air rib at the connection between the air column and the foundation is the most unfavorable position, and the two side drawstrings at the connection between the drawstring and the foundation are the most unfavorable positions.

[0179] Further, the structural effect of blast fragment load on the target flexible protective structure is analyzed:

[0180] This embodiment obtains the arrival time of fragments and the completion time of fragments at different distances of the longitudinal projection from the explosion center to the shelter (i.e., the air rib tent) through simulation analysis, such as Fig.13 and Fig.14 shown; from Fig.13 and Fig.14 It can be seen that after the explosion of the low-resistance explosive bomb, the fragments always arrive at different positions of the shelter before the shock wave, and the time for the fragments to complete their action does not exceed 22.5 milliseconds, while the shock wave reaches the corresponding position of the shelter after 45 milliseconds, which is much later than the arrival and action time of the fragments; therefore, there is no problem of the combined action of the shock wave and the fragments.

[0181] Based on this, the aforementioned simulation protection performance data can be summarized as follows:

[0182] Based on the air rib spacing, the full-process displacement-time curve of the inflatable arch structure under the action of the explosion impact was tracked respectively, and the following results were obtained: when the air rib spacing is at a first fixed value, the displacements of the explosion impact in the y and z directions are both less than a certain spacing (the spacing can be obtained based on the aforementioned full-process displacement-time curve), and the displacement in the x direction is slightly greater than a certain spacing. When the air rib spacing is at a second fixed value, the finite element simulation results do not converge, which may be due to the fact that under the action of the explosion impact, the tarpaulin has a large displacement, resulting in non-convergence of the results. In this embodiment, the numerical value of the aforementioned air rib spacing is not disclosed, and only the analysis process of the air rib spacing is described.

[0183] The results of load transfer analysis of tarpaulin under explosion impact are as follows: when the explosion impact acts, the external load is unevenly distributed, the shape of the membrane surface will change significantly, and the air ribs balance the external load by reducing the volume of the tent room and increasing the pressure difference between the inside and outside of the air ribs. Since the stiffness of the flexible membrane material is very small, the load cannot be transferred to a larger range, and the local deformation and strain of the membrane material will be relatively large, resulting in stress concentration, which may cause the membrane material to tear. At this time, the load transfer and distribution rules applied by the tarpaulin on the air column will change.

[0184] In this way, through the aforementioned step S3, the finite element analysis model can be used to obtain the simulated protection performance data of the target flexible protective structure; then, in order to ensure the accuracy of the simulation, the present embodiment also needs to obtain its actual protection performance data, and combine the aforementioned simulated protection performance data to perform feedback optimization of the finite element analysis model, wherein the feedback optimization process can be but is not limited to as shown in the following step S4.

[0185] S4. Based on the structural data, the actual protection performance data of the target flexible protection structure is obtained, and according to the actual protection performance data and the simulated protection performance data, the finite element analysis model of the target flexible protection structure is optimized to obtain an optimized finite element analysis model.

[0186] In this embodiment, in order to effectively evaluate the overall failure mode and load transfer law of the air rib tent structure, a scaled model test was carried out. The schematic diagram of the site layout can be found in Fig.15 As shown, at the same time, the measured waveforms of different pressure measuring points are collected to obtain the actual protection performance data. In this way, the actual protection performance data can be obtained through the aforementioned scaled model test.

[0187] Then, in combination with the aforementioned simulated protection performance data, the finite element analysis model can be optimized to obtain an optimized finite element analysis model; wherein, this embodiment corrects the model based on the error between the actual protection performance data and the simulated protection performance data, and after correction, continues the simulation process to obtain new simulated protection performance data, and then compares again to determine whether it is necessary to continue model optimization; wherein, if the error between the new simulated protection performance data and the actual protection performance data is still greater than the calibration condition, then it is necessary to continue the optimization until the error between the two is less than or equal to the calibration condition; at this time, the obtained optimized finite element analysis model can be used as the final model; of course, the aforementioned calibration conditions can be specifically set according to actual use, and are not limited to the aforementioned examples.

[0188] In this embodiment, the model modification process is:

[0189] Step 1: Call ANSYS software to compare the actual protection performance data with the finite element analysis data (i.e., simulated protection performance data), and based on the calculation method and parameters of the finite element analysis, obtain the difference between the simulated protection performance data and the actual protection performance data.

[0190] Step 2: Based on the difference in step 1, the calculation method and parameters of the finite element analysis are adjusted to obtain an optimized finite element analysis model; in this embodiment, the model is improved by optimizing the flexible structure topology and dynamic calculation model parameters; wherein, the improved finite element analysis calculation method includes adjusting the flexible structure topology unit type and material properties, as well as the load and constraint application method, and adjusting the finite element analysis parameters.

[0191] Step 3: Use the optimized finite element analysis model to perform simulation again, so as to compare and analyze the actual protection simulation data with the simulation data obtained by the optimized finite element analysis model again, until the error between the simulated protection performance data and the actual protection performance data is less than the calibration condition; in this way, the calculation method can be continuously optimized and the model parameters can be adjusted in the aforementioned process to improve the accuracy of the finite element analysis.

[0192] Furthermore, if the actual protection performance data does not meet the minimum protection performance, then it is necessary to optimize the structural data to obtain the optimized structural data, and then execute steps S3 and S4 again to obtain the finite element analysis model again, and perform feedback optimization of the model again to obtain the optimized finite element analysis model.

[0193] Thus, after the optimization processing of the finite element analysis model is completed based on the aforementioned step S4, the effective protective performance data of the air rib tent can be obtained based on this, and the process can be but not limited to as shown in the following step S5.

[0194] S5. Utilize the optimized finite element analysis model to obtain the effective protection performance data of the target flexible protection structure, so as to obtain the safety protection performance verification result of the target flexible protection structure based on the effective protection performance data; in this embodiment, if the effective protection performance data meets the standard performance data, then the safety protection performance verification result of the target flexible protection structure can be generated as passed, otherwise, failed; at the same time, the structural data in the aforementioned step S2 can also be sent to the production end, so that the production end can produce the air rib tent based on this structural data; or the aforementioned structural data can be visualized to complete the acquisition of the structural data of the air rib tent.

[0195] Thus, through the design method of the flexible protective structure described in detail in the aforementioned steps S1 to S5, the present invention calculates the load parameters of the air rib tent by setting usage scenario conditions such as wind, snow and explosion impact; then, according to the load parameters, the structural data of the air rib tent is determined, and based on this, its corresponding finite element analysis model is established; then, based on the finite element analysis model, the simulated protection performance data of the air rib tent is obtained; then, its actual protection performance data is obtained, and combined with the aforementioned simulated protection performance data, the finite element analysis model is optimized to obtain the optimized finite element analysis model; finally, the simulation of the safety protection performance of the air rib tent can be completed based on the optimized finite element analysis model; thus, the present invention uses the error between its simulation data and the actual data to feedback the optimized finite element analysis model of the air rib tent, so that the accuracy of the constructed analysis model can be improved; based on this, the accuracy of the simulation is greatly improved, thereby ensuring the reliability of the obtained safety protection performance data, and therefore, it is very suitable for large-scale application and promotion.

[0196] like Fig.17 As shown, the second aspect of this embodiment provides a hardware device for implementing the design method of the flexible protective structure described in the first aspect of the embodiment, including:

[0197] The load parameter calculation unit is used to calculate the load parameters of the target flexible protective structure based on the application scenario of the target flexible protective structure.

[0198] The tent structure acquisition unit is used to determine the structural data of the target flexible protective structure according to the load parameters.

[0199] The simulation unit is used to establish a finite element analysis model of the target flexible protective structure using the structural data of the target flexible protective structure, and obtain simulated protective performance data of the target flexible protective structure based on the finite element analysis model.

[0200] A feedback optimization unit is used to obtain actual protection performance data of the target flexible protection structure based on the structural data, and optimize the finite element analysis model of the target flexible protection structure according to the actual protection performance data and the simulated protection performance data to obtain an optimized finite element analysis model.

[0201] The simulation unit is also used to use the optimized finite element analysis model to obtain effective protection performance data of the target flexible protection structure, so as to obtain the safety protection performance verification result of the target flexible protection structure based on the effective protection performance data.

[0202] The working process, working details and technical effects of the device provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0203] like Fig.18 As shown, the third aspect of this embodiment provides another design device for a flexible protective structure. Taking the device as an electronic device as an example, it includes: a memory, a processor and a transceiver that are communicatively connected in sequence, wherein the memory is used to store computer programs, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute the design method of the flexible protective structure as described in the first aspect of the embodiment.

[0204] The working process, working details and technical effects of the electronic device provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0205] The fourth aspect of this embodiment provides a storage medium storing instructions for the design method of a flexible protective structure described in the first aspect of the embodiment, that is, the storage medium stores instructions, and when the instructions are run on a computer, the design method of a flexible protective structure described in the first aspect of the embodiment is executed.

[0206] The working process, working details and technical effects of the storage medium provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0207] The fifth aspect of this embodiment provides a computer program product comprising instructions, which, when executed on a computer, causes the computer to execute the method for designing a flexible protective structure as described in the first aspect of the embodiment, wherein the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0208] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A design method for a flexible protective structure, characterized in that: include: Calculating the load parameters of the target flexible protective structure based on the application scenario of the target flexible protective structure; Determining structural data of the target flexible protective structure according to the load parameters; Using the structural data of the target flexible protective structure, a finite element analysis model of the target flexible protective structure is established, and based on the finite element analysis model, simulated protection performance data of the target flexible protective structure is obtained; Based on the structural data, actual protection performance data of the target flexible protection structure is obtained, and according to the actual protection performance data and the simulated protection performance data, a finite element analysis model of the target flexible protection structure is optimized to obtain an optimized finite element analysis model; Using the optimized finite element analysis model, effective protection performance data of the target flexible protection structure is obtained, so as to obtain a safety protection performance verification result of the target flexible protection structure according to the effective protection performance data; Based on the application scenario of the target flexible protective structure, the load parameters of the target flexible protective structure are calculated, including: Based on the application scenario, obtaining the wind resistance level and snow resistance level of the target flexible protective structure; According to the wind resistance level, the ambient wind speed is determined, and according to the snow resistance level, the thickness of the covered snow is determined; According to the application scenario, the explosion shock wave load and the explosion fragment load of the target flexible protective structure are calculated; Generate the load parameters of the target flexible protective structure by using the ambient wind speed, the snow cover thickness, the explosion shock wave load and the explosion fragment load; According to the application scenario, the explosion shock wave load of the target flexible protective structure is calculated, including: According to the application scenario, obtaining explosion parameters; Based on the explosion parameters, the overpressure peak value of the incident shock wave acting on the target flexible protective structure during the ground explosion is calculated; Calculating the overpressure action time according to the overpressure peak value of the incident shock wave; Utilizing the incident shock wave overpressure peak value, calculating the ground reflected shock wave overpressure peak value acting on the target flexible protective structure during ground explosion; Calculating the structural load of the target flexible protective structure during ground explosion according to the overpressure peak value of the ground reflected shock wave and the overpressure action time; The explosion shock wave load is obtained by using the overpressure peak value of the ground reflected shock wave and the structural load.

2. The method according to claim 1, characterized in that The explosion parameters include: the distance between the target flexible protective structure and the explosion center point and the explosive TNT charge; Among them, based on the explosion parameters, the incident shock wave overpressure peak acting on the target flexible protective structure during the ground explosion is calculated, including: According to the following formula (1), the overpressure peak value of the incident shock wave is calculated; （1） In the above formula (1), represents the incident shock wave overpressure peak value, Indicates the explosive TNT charge, Indicates the distance between the target flexible protective structure and the explosion center point, All represent constants; Correspondingly, the peak value of the incident shock wave overpressure is used to calculate the peak value of the ground reflected shock wave overpressure acting on the target flexible protective structure during the ground explosion, which includes: According to the following formula (2), the overpressure peak value of the ground reflected shock wave is calculated; （2） In the above formula (2), represents the peak overpressure value of the ground reflected shock wave, and All represent constants.

3. The method according to claim 1, characterized in that The explosion parameters include: the amount of explosive TNT, wherein the overpressure action time is calculated based on the overpressure peak value of the incident shock wave, including: The overpressure action time is calculated according to the following formula (3); （3） In the above formula (3), represents the overpressure action time, represents the incident shock wave overpressure peak value, represents the explosive TNT charge, and All represent constants.

4. The method according to claim 1, characterized in that: The structural load of the target flexible protective structure during the ground explosion is calculated according to the overpressure peak value of the ground reflected shock wave and the overpressure action time, including: Obtaining the natural circular frequency and allowable ductility ratio of the structural components of the target flexible protective structure; The dynamic coefficient is calculated according to the self-vibration circular frequency, the allowable ductility ratio and the overpressure action time, and according to the following formula (4); （4） In the above formula (4), represents the dynamic coefficient, represents the natural circular frequency, represents the allowable ductility ratio, Indicates the overpressure action time; The structural load is calculated based on the dynamic coefficient and the overpressure peak value of the ground reflected shock wave.

5. The method according to claim 1, characterized in that Based on the finite element analysis model, the simulated protection performance data of the target flexible protection structure is obtained, including: According to the finite element analysis model, the target flexible protective structure is subjected to a structural damage factor influence analysis process, so as to obtain a structural damage factor influence analysis result after the structural damage factor influence analysis process, wherein the structural damage factor influence analysis result includes an analysis result of the influence of the rib diameter on the stress performance of the target flexible protective structure, an analysis result of the influence of the air pressure on the stress performance of the target flexible protective structure, and an analysis result of the influence of the air rib spacing on the stress performance of the target flexible protective structure; Using the finite element analysis model, a structural load transfer analysis is performed on the target flexible protective structure, so as to obtain a structural load transfer analysis result after the structural load transfer analysis, wherein the structural load transfer analysis result includes a load transfer analysis result of the shock wave on the air column of the target flexible protective structure, a load transfer analysis result of the shock wave on the air column and foundation of the target flexible protective structure, a load transfer analysis result of the air column and foundation under the action of wind load, and an analysis result of the structural action of the explosion fragment load on the target flexible protective structure; The simulated protection performance data of the target flexible protective structure is generated by using the structural damage factor impact analysis results and the structural load transfer analysis results.

6. A design device for a flexible protective structure, characterized in that: include: A load parameter calculation unit, used to calculate the load parameter of the target flexible protective structure based on the application scenario of the target flexible protective structure; A tent structure acquisition unit, used to determine the structural data of the target flexible protective structure according to the load parameters; A simulation unit, used to establish a finite element analysis model of the target flexible protective structure using the structural data of the target flexible protective structure, and obtain simulated protection performance data of the target flexible protective structure based on the finite element analysis model; A feedback optimization unit is used to obtain actual protection performance data of the target flexible protection structure based on the structural data, and optimize the finite element analysis model of the target flexible protection structure according to the actual protection performance data and the simulated protection performance data to obtain an optimized finite element analysis model; The simulation unit is further used to obtain effective protection performance data of the target flexible protection structure by using the optimized finite element analysis model, so as to obtain a safety protection performance verification result of the target flexible protection structure according to the effective protection performance data; Based on the application scenario of the target flexible protective structure, the load parameters of the target flexible protective structure are calculated, including: Based on the application scenario, obtaining the wind resistance level and snow resistance level of the target flexible protective structure; According to the wind resistance level, the ambient wind speed is determined, and according to the snow resistance level, the thickness of the covered snow is determined; According to the application scenario, the explosion shock wave load and the explosion fragment load of the target flexible protective structure are calculated; Generate the load parameters of the target flexible protective structure by using the ambient wind speed, the snow cover thickness, the explosion shock wave load and the explosion fragment load; According to the application scenario, the explosion shock wave load of the target flexible protective structure is calculated, including: According to the application scenario, obtaining explosion parameters; Based on the explosion parameters, the overpressure peak value of the incident shock wave acting on the target flexible protective structure during the ground explosion is calculated; Calculating the overpressure action time according to the overpressure peak value of the incident shock wave; Utilizing the incident shock wave overpressure peak value, calculating the ground reflected shock wave overpressure peak value acting on the target flexible protective structure during ground explosion; Calculating the structural load of the target flexible protective structure during ground explosion according to the overpressure peak value of the ground reflected shock wave and the overpressure action time; The explosion shock wave load is obtained by using the overpressure peak value of the ground reflected shock wave and the structural load.

7. An electronic device, characterized in that: include: A memory, a processor and a transceiver which are sequentially connected in communication, wherein the memory is used to store a computer program, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute the design method of a flexible protective structure as described in any one of claims 1 to 5.

8. A computer program product comprising instructions, characterized in that When the instructions are executed on a computer, the computer is caused to execute the method for designing a flexible protective structure as claimed in any one of claims 1 to 5.

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