Performance analysis method and device for anti-impact cab and program product

Abstract

The invention discloses a performance analysis method and device for an anti-impact cab and a program product, and relates to the technical field of performance analysis of off-road vehicle cables.The method comprises the steps that typical working conditions are determined according to different shooting working conditions, and flow field calculation is conducted; building a typical structure calculation model, and calculating the material strength grade and the material thickness by taking the impact strength performance as a target; a direct integration method is collected, transient dynamic analysis is carried out, and a stress cloud picture and a displacement cloud picture of the cab are obtained; scanning resetting is adopted in live firing verification, comparison with an analysis result is carried out, and collected loads are screened; judging whether the transient dynamic analysis is consistent with a test result, and if not, performing transient dynamic analysis again; and judging whether the strength meets the requirement or not, and if not, re-building the calculation model. According to the performance analysis method and device for the anti-impact cab and the program product provided by the embodiment of the invention, the development and verification efficiency of the cab can be remarkably improved, and the development period is greatly shortened.

Description

Technical Field

[0001] The present application relates to the technical field of off-road vehicle cab performance analysis, and in particular to a performance analysis method for an impact-resistant cab, a performance analysis device for an impact-resistant cab, and a program product. Background Art

[0002] Artillery, as an important part of the modern warfare weapon system, plays an irreplaceable role. With the continuous development of the war form, the mobility of artillery has become an important performance indicator that everyone pays attention to. The outer skin of the traditional gun platform is a bulletproof armor structure. Although it has strong protection capabilities, it is slightly less maneuverable due to the heavy weight of the whole vehicle. Against this background, a new type of wheeled vehicle-mounted artillery came into being, which can not only provide powerful firepower coverage capabilities, but also have high maneuverability, becoming the darling of the new war form. Due to the layout conditions and performance characteristics of the new wheeled vehicle-mounted artillery, the muzzle is close to the cab during the artillery firing process. During the test, when collecting data by arranging sensors, it is easy to be affected by the shock wave and fall off, resulting in large errors in the data, affecting the accuracy of the analysis. It requires sufficient sample quantity and experience. The cycle of establishing CAE simulation analysis is long, and the analysis uncertainty and difficulty are large.

[0003] The patent CN113919059A discloses a method for analyzing a vehicle body under the action of a muzzle shock wave, which calculates the maximum stress borne by the vehicle body parts and the maximum displacement of key parts through simulation analysis, and also discloses a terminal device and storage medium to assist the above analysis method. The content of this invention completely relies on simulation analysis software, with complex and numerous requirements in the early stage, a long analysis cycle, and a large workload of repeated changes in the later design. It has not been simplified model theoretical calculation and is not highly integrated with experiments. Summary of the invention

[0004] The purpose of the present invention is to provide a performance analysis method, device and program product for an impact-resistant cab to solve the problems of complex extraction of effective stress load conditions, long CAE analysis cycle and large amount of later structural engineering adjustments when the muzzle fires shells at various positions relative to the cab.

[0005] The present invention provides the following scheme:

[0006] According to one aspect of the present invention, a performance analysis method for an impact-resistant cab is provided, the performance analysis method for an impact-resistant cab comprising:

[0007] Determine typical working conditions according to different shooting conditions and perform flow field calculations;

[0008] Build a calculation model for the typical structure, aiming to meet the impact resistance strength performance, and calculate the material strength grade and material thickness;

[0009] Adopt the direct integration method to conduct transient dynamic analysis and obtain the stress nephogram and displacement nephogram of the cab;

[0010] During the live ammunition shooting verification, use scanning and resetting, compare with the analysis results, and screen the collected loads;

[0011] Judge whether the transient dynamic analysis is consistent with the test results. If not, conduct the transient dynamic analysis again. If so, continue with the next step;

[0012] Judge whether the strength meets the requirements. If not, rebuild the calculation model.

[0013] Optionally, determine the typical working conditions according to different shooting conditions and conduct fluid field calculations, including:

[0014] To determine the working condition with the greatest impact of the shock wave on the platform cab for fluid field analysis and provide input conditions for subsequent work.

[0015] Optionally, build a calculation model for the typical structure, aiming to meet the impact resistance strength performance, and calculate the material strength grade and material thickness, including:

[0016] Build a calculation model for the typical structure, aiming to meet the impact resistance strength performance. Determine the material strength grade and material thickness of the selected sheet metal and structural beams through calculation, and complete the cab structure construction.

[0017] Optionally, build a calculation model for the typical structure, aiming to meet the impact resistance strength performance. Determine the material strength grade and material thickness of the selected sheet metal and structural beams through calculation, and complete the cab structure construction, including:

[0018] Establish a relational formula between the material size, material thickness, and material yield stress through calculation. Use the local characteristics of large cover parts and beams as the typical structure to establish a basic model. Select materials and adjust the structure according to the calculation results, aiming at weight and performance, calculate the material strength and material thickness of the selected sheet metal and structural beams, and build the cab structure.

[0019] Optionally, build a calculation model for the typical structure, aiming to meet the impact resistance strength performance, and calculate the material strength grade and material thickness, including:

[0020] The relationship between the material thickness of the outer panel material and the allowable stress of the material is as follows:

[0021]

[0022] Among them, σ represents the tensile stress on the beam area, [σ] represents the allowable stress, and σ ≤ [σ]. L represents the fixed length of the base section for beam analysis, t1 represents the width of the square area, and P max represents the ultimate pressure received by the selected area.

[0023] Optionally, a typical structure calculation model is built with the goal of meeting the impact resistance strength performance to calculate the material strength grade and the thickness of the material. It also includes:

[0024] The thickness of the beam is given by the following formula:

[0025]

[0026] Among them, σ represents the tensile stress on the beam area, [σ] represents the allowable stress, and σ ≤ [σ]. L represents the fixed length of the base section for beam analysis, b2, h2, and t2 represent the side lengths of the intercepted area, and P max represents the ultimate pressure received by the selected area.

[0027] Optionally, a typical structure calculation model is built with the goal of meeting the impact resistance strength performance to calculate the material strength grade and the thickness of the material. It also includes:

[0028] The cab is meshed, the possible typical deformation positions are marked, and the deformation schematic diagrams of the rear panel and the roof are scanned and confirmed at the marked points.

[0029] Optionally, in the live ammunition shooting verification, scanning and resetting are adopted to compare with the analysis results and screen the collected loads, including:

[0030] After the test, the deformation amounts of the rear panel and the roof of the cab at the marked points are scanned and confirmed and recorded.

[0031] According to the second aspect of the present invention, a performance analysis device for an impact-resistant cab is provided. The performance analysis device for the impact-resistant cab includes:

[0032] A first calculation module for determining typical working conditions according to different shooting working conditions and performing flow field calculations;

[0033] A second calculation module for building a typical structure calculation model with the goal of meeting the impact resistance strength performance to calculate the material strength grade and the thickness of the material;

[0034] An analysis module for performing transient dynamics analysis by using the direct integration method to obtain the stress nephogram and displacement nephogram of the cab;

[0035] A comparison module for adopting scanning and resetting in the live ammunition shooting verification to compare with the analysis results and screen the collected loads;

[0036] The first judgment module is used to judge whether the transient dynamics analysis is consistent with the test results. If not, the transient dynamics analysis is performed again. If so, the next step is continued;

[0037] The second judgment module is used to judge whether the strength meets the requirements. If not, the calculation model is built again.

[0038] According to three aspects of the present invention, a computer program product is provided, including a computer program which, when executed, is used to implement the performance analysis method of the shock-proof cab as described above.

[0039] Through the above solutions, the following beneficial technical effects are obtained:

[0040] 1. According to the isobaric distribution map of the flow field, the basic section is divided, the basic theoretical analysis model of the cab is established, and a fixed-size area is selected and simplified into a simply supported beam model for convenient calculation;

[0041] 2. By theoretical calculation, the relational formula between the material thickness, size and yield stress is established, the material grade and material specifications of the cab are determined, the local typical structures are determined, and the anti-shock wave structure types at different positions are confirmed with the ultimate impact load;

[0042] 3. Specific marker points are used for scanning and confirmation, and the variants are compared with the analysis results to improve the accuracy and credibility of subsequent analysis. Description of the Drawings

[0043] Figure 1 is the flow chart of the performance analysis method of the shock-proof cab provided by the embodiment of the present application;

[0044] Figure 2 is the cloud diagram of the muzzle shock wave air flow transmission provided by the embodiment of the present application;

[0045] Figure 3 is the schematic diagram of the force analysis of the selected outer plate area and beam area provided by the embodiment of the present application;

[0046] Figure 4 is the schematic diagram of the variant confirmation by scanning the marker points on the rear wall and the roof provided by the embodiment of the present application;

[0047] Figure 5 is the schematic diagram of the maximum stress cloud diagram of the roof and rear wall of the cab at different times provided by the embodiment of the present application;

[0048] Figure 6 is the flow chart of the first calculation operation in the performance analysis method of the shock-proof cab provided by the embodiment of the present application;

[0049] Figure 7 is the flow chart of the second calculation operation in the performance analysis method of the shock-proof cab provided by the embodiment of the present application;

[0050] Figure 8 It is a flowchart of the second calculation operation in the performance analysis method of the shock-proof cab provided by the embodiment of the present application;

[0051] Figure 9 It is a flowchart of the performance analysis method of the shock-proof cab provided by the embodiment of the present application;

[0052] Figure 10 It is a flowchart of the performance analysis method of the shock-proof cab provided by the embodiment of the present application;

[0053] Figure 11 It is a structural diagram of the performance analysis device of the shock-proof cab provided by the embodiment of the present application. Detailed implementation manners

[0054] Next, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] As Figure 1 shown, the embodiment of the present invention provides a performance analysis method for a shock-proof cab. Refer to Figure 1 , the performance analysis method of the shock-proof cab includes the following operating steps:

[0056] S11. Determine typical working conditions according to different shooting working conditions and perform flow field calculation.

[0057] S12. Build a typical structure calculation model and calculate the material strength grade and material thickness with the goal of meeting the impact strength performance.

[0058] S13. Adopt the direct integration method to perform transient dynamics analysis and obtain the stress nephogram and displacement nephogram of the cab.

[0059] S14. In live firing verification, use scanning and resetting, compare with the analysis results, and screen the collected loads.

[0060] S15. Judge whether the transient dynamics analysis is consistent with the test results. If not, re-perform the transient dynamics analysis. If so, continue to the next step.

[0061] S16. Judge whether the strength meets the requirements. If not, re-build the calculation model.

[0062] The object of the present invention is to provide a systematic strength performance analysis method for a cab under the action of shock waves, so as to solve the problems of complex extraction of effective stress load conditions, long CAE analysis cycle, and large amount of subsequent structural engineering adjustment when shells are fired at various positions of the cab relative to the muzzle. Through the calculation of this method, the basic structural strength performance of the cab corresponding to the impact in the early stage is improved, and then the cab is optimized by means of CAE analysis, which can significantly improve the development and verification efficiency of this type of cab and greatly shorten the research and development cycle.

[0063] In an embodiment of the present invention, as Figure 1 shown, it is a flow block diagram of a method for calculating the strength performance of a shock wave-proof cab. First, the positions of the muzzle closest to the cab are used as typical working conditions for subsequent calculations; according to the flow field analysis, the maximum pressure of the cab under this typical working condition is calculated. As Figure 2 shown, it is a schematic diagram of the muzzle shock wave gas flow transmission cloud map under a possible cab structure type.

[0064] The gas flow transmission cloud map is the basis for subsequent various analyses in this embodiment. Since the objective of the analysis in this embodiment is the stress and displacement generated in the cab after shell firing, after shell firing, the shock wave around the entire muzzle is the root cause of this stress and displacement. The gas flow transmission cloud map is the original data source for obtaining the stress and displacement of the whole cab and its parts.

[0065] The gas flow transmission cloud map should be collected within a short time after the shell is fired from the muzzle. If the collected gas flow transmission cloud map is collected a long time after shell firing, since the impact of the collected gas flow on the cab is very small at this time, it has little significance for subsequent analysis and is not recommended for use.

[0066] During the collection process of the gas flow transmission cloud map, it should also be noted that the collected data should be kept within the space around the cab as much as possible. Because in the technical solution provided in this embodiment, the analysis object is the stress and displacement of the cab under the action of shock waves. This means that if the collected gas flow transmission cloud map data is too far from the cab in terms of spatial distance, the collected gas flow transmission cloud map data has little practical significance for subsequent theoretical calculations and analyses.

[0067] After obtaining the gas flow transmission cloud map, the next step is to build a calculation model of the cab.

[0068] The goal of building the calculation model is to make the built calculation model corresponding to the real cab meet the requirements of impact strength.

[0069] As Figure 3 shown, the basic cross-section is intercepted with the local top cover skin area and the frame beam as the analysis basis.

[0070] The basic section is the basis for the subsequent theoretical load-bearing calculation of the cab rear wall and roof. The standard for the basic section is to be able to fully display the cab rear wall and roof without partial or excessive interception.

[0071] After completing the analysis of the basic section, you can then perform mesh division and theoretical calculations based on the basic section. Figure 4 As shown, the cab is gridded, possible typical deformation positions are marked, and the marked points on the rear enclosure and top cover are scanned to confirm the deformation diagram. After the test, the deformation amount of the marked points on the rear enclosure and top cover of the cab is scanned to confirm and record.

[0072] like Figure 5 As shown, taking the muzzle at the closest position to the cab as a reference (limit value), based on the direct integration method, a transient dynamic analysis of the cab is performed to obtain the stress cloud map and displacement cloud map of the cab.

[0073] It should be noted that, in this embodiment, the stress cloud map and displacement cloud map obtained here are the results of theoretical calculation. In this embodiment, it is necessary to compare the results of theoretical calculation, that is, the results of CAE analysis, with the stress values ​​and displacement values ​​obtained from actual tests to determine whether the calculation model of the originally constructed cab needs to be further adjusted.

[0074] Comparing the theoretical calculation results with the test results has another meaning, which is that the loads actually used in the test can be screened. Some test loads whose result data are not very meaningful for practical applications can be eliminated, so as to ensure that the actual experimental loads are meaningful loads and that the test operations are effective test operations.

[0075] In this embodiment, the confirmation of the test results includes two independent operation steps. In addition to comparing the theoretical calculation results with the test results, it also includes an operation step of strength confirmation.

[0076] In the strength confirmation operation step, the content of the confirmation is the strength of the constructed calculation model. If the strength meets the requirements, the constructed calculation model meets the requirements, and the execution process of the performance analysis method ends. If the strength does not meet the requirements, the constructed calculation model is unqualified and needs to return to S12 to be rebuilt.

[0077] like Figure 6 As shown, the embodiment of the present invention also provides an implementation of the first computing operation. Figure 6 , determine the typical working conditions according to different shooting conditions, and perform flow field calculations, including:

[0078] S61 is used to determine the working condition in which the cab of the platform is most affected by the shock wave, for fluid field analysis, and to provide input conditions for subsequent work.

[0079] The working condition in which the shock wave has the greatest impact can be determined by observing the degree of deformation of the cab after the test.

[0080] In addition to observing the degree of deformation of the cab after the test, there are other determination methods. For example, taking the driver's seat as the center, set the first three-dimensional boundary range; according to human physiological characteristics, set the second three-dimensional boundary range for tolerating intrusion; assign scores to the first and second three-dimensional boundary ranges.

[0081] According to statistics of battlefield explosion scenarios (including scenarios of passive attack explosions and active gunfire explosions), set up an experimental model; collect cab deformation data according to the experimental model. The deformation data includes the degree to which the cab intrudes into the first three-dimensional boundary range and the second three-dimensional boundary range after deformation, and evaluate the working condition most affected by the shock wave through preset score assignment. Another example is to take a certain sensitive device as the center, set the third three-dimensional boundary range, assign a score to the third three-dimensional boundary range; evaluate the working condition most affected by the shock wave through preset score assignment.

[0082] As Figure 7 shown, an embodiment of the present invention also provides an implementation manner of the second calculation operation. Refer to Figure 7 , build a typical structure calculation model, aiming to meet the impact strength performance, determine the material strength grade and material thickness of the selected sheet material and structural beam through calculation, and complete the cab structure construction, including:

[0083] S71, establish a relational formula between material size, material thickness and material yield stress through calculation, establish a basic model based on the local characteristics of large covering parts and beams, select materials and adjust the structure according to the calculation results, and calculate the material strength and material thickness of the selected sheet material and structural beam with weight and performance as the goals, and build the cab structure.

[0084] It should be noted that in this embodiment, the established relational formula includes: the relationship between the material thickness of the outer plate material and the allowable stress of the material, and the relationship between the material thickness of the beam and the allowable stress of the material.

[0085] Among them, the relationship between the material thickness of the outer plate material and the allowable stress of the material is:

[0086]

[0087] Among them, σ represents the tensile stress received in the beam area. [σ] represents the allowable stress, and σ ≤ [σ]. L represents the fixed length of the basic section for beam analysis. t1 represents the width of the square area. P maxIndicates the ultimate pressure received by the selected area.

[0088] Among them, the relationship between the material thickness of the beam and the allowable stress of the material is:

[0089]

[0090] Among them, σ represents the tensile stress received by the beam area. [σ] represents the allowable stress, and σ ≤ [σ]. L represents the fixed length of the cross-section of the beam analysis basis. b2, h2, and t2 represent the side lengths of the intercepted area.

[0091] Such as Figure 8 shown, the embodiment of the present invention also provides another implementation manner of the second calculation operation. Refer to Figure 8 , build a typical structure calculation model, aiming to meet the impact strength performance, and calculate the material strength grade and material thickness, including:

[0092] S81, determine whether the allowable stress of the outer plate material after the material meets the preset relationship.

[0093] S82, deduce the thickness of the beam from the preset formula.

[0094] Take the local top cover skin area and the frame beam to intercept the analysis basis cross-section, simplify the structure into a simply supported beam model, and the tensile stress received by the square area with side lengths b1 and h1 (h1 = t1) and the beam area with length L can be expressed as:

[0095]

[0096] Among them, M is the bending moment and W is the bending section coefficient. The received tensile stress should be less than the allowable stress [σ], that is, σ ≤ [σ].

[0097] The bending moment of the selected area can be expressed as:

[0098]

[0099] The bending section coefficient of the selected area can be expressed as:

[0100]

[0101] Among them, t1 is the outer plate thickness, and the uniformly distributed load of the selected area can be expressed as:

[0102]

[0103] Among them, P max is the ultimate pressure received by the selected area. By combining the above formulas, the relationship between the outer plate material thickness t1 and the allowable stress of the material is obtained as:

[0104]

[0105] As shown Figure 6 in the figure, a beam with a length of 500 mm is selected to analyze the basic section, and the section modulus of the selected area can be expressed as:

[0106]

[0107] Substitute W z and M max into it, and the relationship between the material thickness t2 of the beam and the allowable stress of the material can be obtained as:

[0108]

[0109] Select a beam with a fixed length L to analyze the basic section, and the thickness t2 of the beam can be calculated.

[0110] As shown Figure 9 in the figure, an embodiment of the performance analysis method of the anti-impact cab is also provided in the embodiment of the present invention. Refer to Figure 9 . The performance analysis method of the anti-impact cab includes the following operation steps:

[0111] S91. Determine the typical working conditions according to different shooting working conditions and perform the flow field calculation.

[0112] S92. Mesh the cab, mark the possible typical deformation positions, and scan and confirm the deformation schematic diagram of the marked points on the rear wall and the roof.

[0113] S93. Adopt the direct integration method to perform transient dynamics analysis to obtain the stress nephogram and displacement nephogram of the cab.

[0114] S94. After the test, scan and confirm the deformation amount of the marked points on the rear wall and the roof of the cab and record it.

[0115] S95. Judge whether the transient dynamics analysis is consistent with the test results. If not, perform the transient dynamics analysis again. If so, continue to execute the next step.

[0116] S96. Judge whether the strength meets the requirements. If not, rebuild the calculation model.

[0117] In the embodiment shown Figure 9 in the figure, in the operation step of originally establishing the calculation model of the cab, the operation of marking the typical deformation positions of the cab is included.

[0118] The advantage of marking typical deformation positions is that in the subsequent comparison operation between the theoretical calculation results and the test results, the comparison operation has a more specific target. In other words, the previous comparison operation was a comparison of the entire plane of the component. After the operation of marking the positions, the comparison operation will be embodied to one position point after another.

[0119] These typical deformation positions to be marked are typically obtained based on the summary of previous test data. For example, for the top cover plate of the cab, its central position is the most likely to deform. Then, the central position of the top cover plate should be marked as a typical deformation position.

[0120] It should be understood that if the typical deformation positions are marked during the establishment of the calculation model, then in the step of scanning and confirmation, the scanning and confirmation operation should also be mainly carried out with reference to the marked point information of these typical deformation positions.

[0121] More typically, in the plane that needs to be compared with each other, if there are several marked points of typical deformation positions, then in the operation steps of scanning and confirmation, the comparison information of several marked points should be recorded.

[0122] In addition to only referring to the deformation data in the previous test data, other reference data such as stress data and temperature data in the test data can also be further referred to.

[0123] It can be understood that during the process of withstanding the shock wave, the position points of stress concentration in the cab structure should also be important position points for data comparison. If the stress is concentrated at one or several points, the probability of large deformation at these points will be much higher than other positions of the cab structure.

[0124] In addition, during the test process, the concentrated high-temperature area should also be an important position point for data comparison.

[0125] On the premise of marking the typical deformation positions, the comparison operation between the test data and the theoretical calculation data should be a comparison operation based on the marked position data. That is to say, the original comparison and recording of the entire plane of the component have become the comparison and recording based on one position point after another.

[0126] As Figure 10 shown, another implementation manner of the performance analysis method of the shock-proof cab is also provided in the embodiment of the present invention. Refer to Figure 10 , the performance analysis method of the shock-proof cab includes the following operation steps:

[0127] S101, determine the typical working conditions according to different shooting working conditions, and perform flow field calculation.

[0128] S102. Build a typical structure calculation model and calculate the material strength grade and material thickness with the goal of meeting the impact strength performance.

[0129] S103. Use the direct integration method to perform transient dynamics analysis to obtain the stress nephogram and displacement nephogram of the cab.

[0130] S104. In live ammunition shooting verification, use scan reset, compare with the analysis results, and screen the collected loads.

[0131] S105. Judge whether the results of transient dynamics analysis are consistent with the test results. If so, execute S106; if not, execute S103.

[0132] S106. Judge whether the strength meets the requirements. If so, end the method operation; if not, execute S102.

[0133] In this embodiment, first determine the typical working conditions in the shooting working conditions and perform flow field calculation on the typical working conditions.

[0134] Specifically, to determine the working condition in which the cab of a certain gun-carrying platform is most affected by the shock wave for flow field analysis.

[0135] Which working condition is the one most affected by the shock wave can be determined by observing the deformation degree of the cab after the test. For example, if the deformation degree of the cab in one working condition is significantly higher than that in another working condition, then the working condition with the greater deformation degree should be regarded as the one more affected. For similar reasons, the working condition most affected by the shock wave should correspond to the working condition with the greatest deformation degree of the cab.

[0136] Next, according to the results of the flow field calculation, build a typical calculation model of the cab. The goal of building the calculation model is to meet the impact strength performance.

[0137] Then, perform the CAE analysis operation. Specifically, use the direct integration method to obtain the stress nephogram and displacement nephogram of the cab. The process of obtaining the stress nephogram and displacement nephogram is the process of transient dynamics analysis.

[0138] Also, in live ammunition shooting verification, use scan reset, compare the results of scan reset with the results of CAE analysis, and according to the comparison results, screen the test loads to remove the invalid test loads.

[0139] Finally, two-step confirmation is performed on whether the model meets the requirements. The first confirmation is to judge whether the results of transient dynamics analysis are consistent with the test results. The second confirmation is to confirm whether the structure meets the strength requirements. If there is a problem in any of the two-step confirmation operations, it is necessary to return to the corresponding step and re-execute the corresponding operation.

[0140] Specifically, if it is determined that the result of the transient dynamics analysis does not match the test result, the operation of performing the transient dynamics analysis is returned. If it is determined that the structure does not meet the requirements of the structural strength, the step of constructing the structural calculation model needs to be returned for execution.

[0141] As Figure 11 shown, the present invention also provides a performance analysis device for an impact-proof cab, including: a first calculation module 111, a second calculation module 112, an analysis module 113, a comparison module 114, a first judgment module 115, and a second judgment module 116.

[0142] The first calculation module 111 is used to determine typical working conditions according to different shooting working conditions and perform flow field calculation.

[0143] The second calculation module 112 is used to build a typical structural calculation model, aiming to meet the impact resistance strength performance, and calculate the material strength grade and material thickness.

[0144] The analysis module 113 is used to perform transient dynamics analysis by using the direct integration method to obtain the stress nephogram and displacement nephogram of the cab.

[0145] The comparison module 114 is used to perform scanning and resetting in the live firing verification, compare with the analysis result, and screen the collected loads.

[0146] The first judgment module 115 is used to judge whether the transient dynamics analysis is consistent with the test result. If not, the transient dynamics analysis is performed again. If so, the next step is continued.

[0147] The second judgment module 116 is used to judge whether the strength meets the requirements. If not, the calculation model construction is performed again.

[0148] In some embodiments, the first calculation module 111 includes: a flow field analysis unit.

[0149] The flow field analysis unit is used to determine the working condition where the platform cab is most affected by the shock wave, perform flow field analysis, and provide input conditions for subsequent work.

[0150] In some embodiments, the second calculation module 112 includes: a construction unit.

[0151] The construction unit is used to build a typical structural calculation model, aiming to meet the impact resistance strength performance, and determine the material strength grade and material thickness of the selected sheet material and structural beam through calculation to complete the cab structure construction.

[0152] In some embodiments, the construction unit is specifically used for:

[0153] Establish a relational formula among the material size, material thickness, and material yield stress through calculation. Take the local characteristics of large panel parts and beams as typical structures to establish a basic model. Select materials and adjust the structure according to the calculation results. Take weight and performance as the goals, calculate the material strength and thickness of the selected sheet materials and structural beams, and build the cab structure.

[0154] In some embodiments, the second calculation module 112 includes: a first relationship determination unit.

[0155] The first relationship determination unit is used for the material thickness of the outer panel material and the allowable stress of the material to satisfy the following relationship:

[0156]

[0157] Where, σ represents the tensile stress received in the beam area, [σ] represents the allowable stress, and σ ≤ [σ], L represents the fixed length of the basic cross-section for beam analysis, t1 represents the width of the square area, and P max represents the ultimate pressure received in the selected area.

[0158] In some embodiments, the second calculation module 112 further includes: a second relationship determination unit.

[0159] The second relationship determination unit is used for the thickness of the beam to be given by the following formula:

[0160]

[0161] Where, σ represents the tensile stress received in the beam area, [σ] represents the allowable stress, and σ ≤ [σ], L represents the fixed length of the basic cross-section for beam analysis, b2, h2, and t2 represent the side lengths of the intercepted area, and P max represents the ultimate pressure received in the selected area.

[0162] In some embodiments, the second calculation module 112 further includes: a mesh generation unit.

[0163] The mesh generation unit is used to generate a mesh for the cab, mark the possible typical deformation positions, and scan and confirm the deformation schematic diagram of the marking points on the rear panel and the roof panel.

[0164] In some embodiments, the comparison module 114 includes: a confirmation and recording unit.

[0165] The confirmation and recording unit is used to scan and confirm the deformation amount of the marking points on the rear panel and the roof panel of the cab after the test and record it.

[0166] It should be noted that although only some basic functional modules are disclosed in the embodiments of the present invention, it does not mean that the composition of the system is limited to the above basic functional modules. On the contrary, what the embodiments intend to express is that those skilled in the art can arbitrarily add one or more functional modules based on the above basic functional modules in combination with the prior art, forming an infinite number of embodiments or technical solutions. That is to say, the system is open rather than closed, and it cannot be considered that the protection scope of the claims of the present invention is limited to the disclosed basic functional modules just because only some individual basic functional modules are disclosed in the embodiments. At the same time, for the convenience of description, the above device is described by function as various units and modules respectively. Of course, when implementing the present invention, the functions of each unit and module can be implemented in the same or multiple software and / or hardware.

[0167] The embodiments of the present invention further provide an electronic device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor executes the program to implement the performance analysis method of the anti-shock cab as described above.

[0168] The embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and the program is executed by a processor to implement the performance analysis method of the anti-shock cab as described above.

[0169] The embodiments of the present invention further provide a computer program product, including a computer program, and when the program is executed, it is used to implement the performance analysis method of the anti-shock cab as described above.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for analyzing the performance of an impact-resistant cab, characterized in that, The performance analysis method of the shock-proof cab includes: Determine typical working conditions according to different shooting conditions and perform flow field calculations; Build a typical structure calculation model, aiming to meet the impact resistance strength performance, and calculate the material strength grade and thickness; Adopt the direct integration method to conduct transient dynamics analysis to obtain the stress nephogram and displacement nephogram of the cab; During live ammunition shooting verification, use scanning and resetting, compare with the analysis results, and screen the collected loads; Judge whether the transient dynamics analysis is consistent with the test results. If not, re-conduct the transient dynamics analysis. If so, continue with the next step; Judge whether the strength meets the requirements. If not, re-build the calculation model; 2. The method according to claim 1, characterized in that, Determine typical working conditions according to different shooting conditions and perform flow field calculations, including: To determine the working condition with the greatest impact of the shock wave on the platform cab for flow field analysis and provide input conditions for subsequent work.

3. The method according to claim 1, wherein Build a typical structure calculation model, aiming to meet the impact resistance strength performance, and calculate the material strength grade and thickness, including: Build a typical structure calculation model, aiming to meet the impact resistance strength performance. Through calculation, determine the material strength grade and thickness of the selected sheet materials and structural beams, and complete the cab structure construction.

4. The method according to claim 3, characterized in that, Build a typical structure calculation model, aiming to meet the impact resistance strength performance. Through calculation, determine the material strength grade and thickness of the selected sheet materials and structural beams, and complete the cab structure construction, including: Establish a relationship formula between material size, thickness and material yield stress through calculation. Take the local characteristics of large covering parts and beams as the typical structure to establish a basic model. According to the calculation results, select materials and adjust the structure. Take weight and performance as the goals, calculate the material strength and thickness of the selected sheet materials and structural beams, and build the cab structure.

5. The method according to claim 1, characterized in that, Build a typical structure calculation model, aiming to meet the impact resistance strength performance, and calculate the material strength grade and thickness, including: The thickness of the outer plate material and the allowable stress of the material satisfy the following relationship: Among them, σ represents the tensile stress on the beam area, [σ] represents the allowable stress, and σ ≤ [σ]. L represents the fixed length of the base section for beam analysis, t1 represents the width of the square area, and P max represents the ultimate pressure received by the selected area.

6. The method according to claim 5, characterized in that, Build a typical structure calculation model, aiming to meet the impact resistance strength performance, and calculate the material strength grade and thickness. It also includes: The thickness of the beam is given by the following formula: Among them, σ represents the tensile stress on the beam area, [σ] represents the allowable stress, and σ ≤ [σ]. L represents the fixed length of the basic cross-section for beam analysis. b2, h2, and t2 represent the side lengths of the intercepted area. P max represents the ultimate pressure received by the selected area.

7. The method according to claim 1, wherein Build a typical structure calculation model, aiming to meet the impact resistance strength performance, and calculate the material strength grade and thickness. It also includes: Perform mesh division on the cab, mark the possible typical deformation positions, and scan and confirm the deformation schematic diagram of the marking points on the rear panel and the roof.

8. The method according to claim 7, wherein During live ammunition shooting verification, use scanning and resetting, compare with the analysis results, and screen the collected loads, including: After the test, scan and confirm the deformation amount of the marking points on the rear panel and the roof of the cab and record it.

9. A performance analysis device for an impact-proof cab, characterized in that, The performance analysis device of the shock-proof cab includes: The first calculation module is used to determine typical working conditions according to different shooting conditions and perform flow field calculations; The second calculation module is used to build a typical structure calculation model, aiming to meet the impact resistance strength performance, and calculate the material strength grade and thickness; The analysis module is used to adopt the direct integration method to conduct transient dynamics analysis to obtain the stress nephogram and displacement nephogram of the cab; The comparison module is used to use scanning and resetting during live ammunition shooting verification, compare with the analysis results, and screen the collected loads; The first judgment module is used to judge whether the transient dynamics analysis is consistent with the test results. If not, perform the transient dynamics analysis again. If so, continue to execute the next step; The second judgment module is used to judge whether the strength meets the requirements. If not, rebuild the calculation model.

10. A computer program product, characterized in that, It includes a computer program which, when executed, is used to implement the performance analysis method of the shock-proof cab according to any one of claims 1 to 8.

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