Enhanced simulation method and device for entrained air in collision of honeycomb counterguard
By filling the solid units in the finite element barrier model and defining the stress-volume strain curve, the equivalent entrained air enhancement effect is solved, and the accuracy problem of the existing model is solved at different impact rates, achieving a higher accuracy virtual assessment.
Patent Information
- Application Number
- CN202411635030.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-02-28
Smart Images
Figure CN119538667A_ABST
Abstract
Description
Technical Field
[0001] One or more embodiments of the present specification relate to computer-aided engineering technology, and more particularly, to a method and device for simulating entrained air enhancement that collides with a honeycomb barrier. Background Art
[0002] With the rapid upgrading of computer software and hardware technology, the use of finite element simulation technology to replace real vehicle collision tests has gradually become an industry consensus. Many studies on virtual evaluation in the field of collision safety, including the refinement of vehicle modeling, dummy models, airbags and restraint systems, and collision barrier models, have been realized with the development of finite element simulation technology, shortening the company's R&D cycle, reducing testing costs, and verifying some scenarios that cannot be tested. However, the development of virtual evaluation has placed higher requirements on the accuracy of the finite element models of the original collision safety evaluation tools, such as the need for a higher-precision finite element barrier model, so that the virtual simulation barrier is more consistent with the barrier trolley in the actual collision process, so as to better guide the development of the whole vehicle in the virtual evaluation.
[0003] Honeycomb aluminum material is a composite material with honeycomb-like cells made of aluminum foil and high-strength adhesive. The most common cells are honeycomb hexagons. The thickness of aluminum foil is usually 0.03-0.08mm, the material is 3003H18, the yield strength is 140Mpa, and the tensile strength is 180Mpa. Although the strength of aluminum foil is very low, the strength of the eccentric performance is very high after being processed into honeycomb aluminum. The stiffness is more than 7 times that of ordinary metal plates, and the strength is more than 3-4 times that of ordinary metal plates. During the quasi-static eccentric extrusion process of honeycomb aluminum, the air entrained in the honeycomb aluminum is easy to leak as the pressure increases, which will not have much impact on the strength of the entire honeycomb aluminum. However, during the dynamic impact process, the air pressure entrained by the honeycomb aluminum increases very quickly, which to a certain extent improves the strength of the honeycomb aluminum barrier.
[0004] The first generation of finite element barrier models is mainly realized by the equivalent stiffness of solid solid units. The eccentric crushing performance of honeycomb aluminum and the air entrainment enhancement effect under dynamic impact are uniformly equivalent to the stress-strain curve of the solid unit. This equivalent method is mainly carried out for the working conditions of barrier calibration. For example, the side collision speed of the AE-MDB barrier is 50km / h. The corresponding solid barrier model mainly uses this working condition for stiffness equivalence. It does not consider the mechanical properties of the barrier under quasi-static and other speeds, which has certain limitations. The second generation of finite element barrier models is mainly realized by shell units. In the finite element modeling process, the aperture of honeycomb aluminum is enlarged by a certain proportion from the perspective of the number of finite element model units and computational efficiency. The mechanical simulation of static and dynamic eccentric crushing of honeycomb aluminum cannot take into account the air entrainment enhancement effect under different impact rates. Therefore, the simulation effect of the existing finite element barrier model is not good enough and cannot meet the more accurate simulation requirements of virtual evaluation. Summary of the invention
[0005] In order to solve the above problems, one or more embodiments of the present specification describe a method and device for simulating the enhancement of entrained air colliding with a honeycomb barrier.
[0006] According to a first aspect, there is provided a method for simulating entrained air enhancement impacting a honeycomb barrier, the method comprising: Determine the honeycomb aluminum aperture based on the preset design requirements, and construct the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture; Finite element modeling was performed based on the physical barrier size and honeycomb aluminum shell units to obtain a collision honeycomb barrier model; Obtaining a first curve obtained after dynamic impact simulation of the collision honeycomb barrier model and a second curve obtained after a dynamic impact trolley test of the physical barrier, and calculating difference data between the first curve and the second curve, wherein the first curve and the second curve are both loading force-deformation curves; Filling solid units into the honeycomb barrier area of the collision honeycomb barrier model, adjusting the unit parameters of the solid units, making the third curve of the solid units match the difference data, and obtaining a complete honeycomb barrier model, wherein the third curve is a stress-volume strain curve.
[0007] Preferably, after constructing the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture, it also includes: The unit thickness of the honeycomb aluminum shell unit is adjusted according to the unit grid width of the finite element model.
[0008] Preferably, the finite element modeling is performed according to the physical barrier size and the honeycomb aluminum shell unit to obtain the collision honeycomb barrier model, including: Finite element modeling was performed based on the physical barrier size and honeycomb aluminum shell units to create a preliminary collision honeycomb barrier model; A sealing plate and a trolley are added to the preliminary collision honeycomb barrier model to obtain a collision honeycomb barrier model.
[0009] Preferably, the finite element modeling is performed according to the physical barrier size and the honeycomb aluminum shell unit, and after the preliminary collision with the honeycomb barrier model, it also includes: A quasi-static crush simulation is performed on each honeycomb barrier block of the preliminary collision honeycomb barrier model, and the node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results, so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset strength range, and the fourth curve is a crushing force-displacement curve.
[0010] Preferably, the node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset intensity range, including: The node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results, so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset strength range, and when the crushing force increases, the loading force remains unchanged or the increase range does not exceed the preset range.
[0011] Preferably, the step of filling solid units into the honeycomb barrier region of the collision honeycomb barrier model, adjusting unit parameters of the solid units, and making the third curve of the solid units match the difference data to obtain a complete honeycomb barrier model comprises: Filling solid units into the honeycomb barrier region of the collision honeycomb barrier model so that the solid units overlap with the honeycomb barrier, the solid units being a constitutive model; The unit parameters of the entity unit are adjusted so that the third curve of the entity unit matches the difference data to obtain a complete honeycomb barrier model.
[0012] Preferably, the method further comprises: After adding at least one new collision speed condition, dynamic impact simulation is performed again on the complete honeycomb barrier model, and the complete honeycomb barrier model is verified according to the simulation results.
[0013] According to a second aspect, there is provided an entrained air enhancement simulation device for impacting a honeycomb barrier, the device comprising: The first construction module is used to determine the honeycomb aluminum aperture based on preset design requirements, and to construct the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture; The second building module is used to perform finite element modeling according to the physical barrier size and the honeycomb aluminum shell unit to obtain a collision honeycomb barrier model; A calculation module, used for obtaining a first curve obtained after the collision honeycomb barrier model is subjected to dynamic impact simulation and a second curve obtained after the physical barrier is subjected to dynamic impact trolley test, and calculating difference data between the first curve and the second curve, wherein the first curve and the second curve are both loading force-deformation curves; An adjustment module is used to fill solid units into the honeycomb barrier area of the collision honeycomb barrier model, adjust the unit parameters of the solid units, make the third curve of the solid units match the difference data, and obtain a complete honeycomb barrier model, wherein the third curve is a stress-volume strain curve.
[0014] According to a third aspect, there is provided an electronic device, comprising a processor and a memory; The processor is connected to the memory; The memory is used to store executable program code; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute the steps of the method provided in the first aspect or any possible implementation manner of the first aspect.
[0015] According to a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and the computer-readable storage medium stores instructions, which, when the instructions are executed on a computer or a processor, cause the computer or the processor to execute the method provided in the first aspect or any possible implementation of the first aspect.
[0016] The method provided in the embodiments of the present specification fills solid units in the collision honeycomb barrier model, and defines the relevant stress-volume strain curve through the solid units to equate the air entrapment enhancement effect caused by the dynamic crushing of the honeycomb barrier. At the same time, because the solid units will not recover after the external force simulated by the solid units is unloaded, it will not affect the further evaluation of the deformation of the honeycomb barrier. In this way, the change of the overall stiffness of the collision honeycomb barrier caused by the air entrapment enhancement in the honeycomb aluminum at different impact speeds can be more accurately simulated, which not only meets the quasi-static crushing requirements, but also can simulate the mechanical characteristics of the collision honeycomb barrier under different impact conditions and the accurate calculation of the honeycomb surface deformation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1It is a flow chart of a method for simulating entrained air enhancement in a collision honeycomb barrier in one embodiment of the present specification.
[0019] Figure 2 It is a curve diagram of the fourth curve in one embodiment of this specification.
[0020] Figure 3 It is a schematic diagram comparing the first curve and the second curve in one embodiment of this specification.
[0021] Figure 4 It is a curve diagram of the third curve in one embodiment of this specification.
[0022] Figure 5 It is a curve diagram of the simulation results after adding a new working condition in an embodiment of this specification.
[0023] Figure 6 It is a structural schematic diagram of an entrained air enhancement simulation device that collides with a honeycomb barrier in one embodiment of the present specification.
[0024] Figure 7 It is a structural diagram of an electronic device in one embodiment of this specification. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.
[0026] In the following introduction, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The following introduction provides multiple embodiments of the present application, and different embodiments can be replaced or combined, so the present application can also be considered to include all possible combinations of the same and / or different embodiments recorded. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present application should also be considered to include embodiments containing one or more of all other possible combinations of A, B, C, and D, although the embodiment may not be clearly recorded in the following text.
[0027] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements described without departing from the scope of the present application. Various processes or components may be appropriately omitted, substituted or added to each example. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, features described in some examples may be combined in other examples.
[0028] See also Figure 1 , Figure 1 : is a flow chart of a method for simulating air entrainment enhancement of a collision honeycomb barrier provided in an embodiment of the present application. In an embodiment of the present application, the method comprises: S101. Determine the aperture of the honeycomb aluminum based on preset design requirements, and construct a honeycomb aluminum shell unit using quadrilateral shell units according to the aperture of the honeycomb aluminum.
[0029] The execution entity of this application can be a cloud server.
[0030] In the embodiments of this specification, the staff will evaluate the finite element simulation calculation efficiency and calculation accuracy in advance according to the different finite element modeling software used and the specific objects to be simulated, and then set the corresponding design requirements, that is, set the corresponding parameter conditions. At the same time, a database can be pre-set in the cloud server, which stores the mapping relationship between different design requirements and honeycomb aluminum apertures. During the actual simulation, the cloud server can quickly determine the honeycomb aluminum aperture corresponding to the preset design requirements by querying the mapping relationship. Then, the modeling software will be modeled according to the quadrilateral shell unit combined with the honeycomb aluminum aperture to obtain a honeycomb aluminum shell unit, in which the honeycomb aluminum cross-section is a hexagon.
[0031] In one embodiment, after constructing the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture, it also includes: The unit thickness of the honeycomb aluminum shell unit is adjusted according to the unit grid width of the finite element model.
[0032] In the embodiments of this specification, the specific unit thickness of the honeycomb aluminum shell unit will be determined and adjusted according to the unit grid width of the finite element model. As an example, since the unit grid of the finite element model is usually selected to have a width of 3-8 mm, in order to ensure the stability of the calculation process and prevent the occurrence of negative volume problems caused by grid node penetration, the unit thickness of the honeycomb aluminum shell unit is not less than 0.25 mm in principle.
[0033] S102. Perform finite element modeling based on the actual barrier size and the honeycomb aluminum shell unit to obtain a collision honeycomb barrier model.
[0034] In the embodiment of this specification, after the honeycomb aluminum shell unit is constructed, the cloud server will determine the number and arrangement of the honeycomb aluminum shell units according to the physical barrier size of the actual object to be simulated, and then construct a collision honeycomb barrier model through finite element modeling. As an example, the collision honeycomb barrier model can be an AC-MDB (AdaptiveCollision Model for Micro-Droplets) collision honeycomb barrier model.
[0035] In one possible implementation, the finite element modeling is performed according to the physical barrier size and the honeycomb aluminum shell unit to obtain the collision honeycomb barrier model, including: Finite element modeling was performed based on the physical barrier size and honeycomb aluminum shell units to create a preliminary collision honeycomb barrier model; A sealing plate and a trolley are added to the preliminary collision honeycomb barrier model to obtain a collision honeycomb barrier model.
[0036] In the embodiments of this specification, generally speaking, the collision honeycomb barrier model to be simulated includes not only the honeycomb aluminum shell units that need to be focused on, but also a complete structure, so it also needs to include the barrier sealing plates corresponding to the barrier, structural adhesive connections, and a trolley for loading the barrier, etc. Therefore, the cloud server performs finite element modeling through the physical barrier size and honeycomb aluminum shell units to obtain a preliminary collision honeycomb barrier model, and then sets the corresponding sealing plates and trolleys in the preliminary collision honeycomb barrier model according to the actual data of the simulated physical object to obtain an assembled collision honeycomb barrier model.
[0037] In one possible implementation, the finite element modeling is performed based on the physical barrier size and the honeycomb aluminum shell unit, and after the preliminary collision with the honeycomb barrier model, it also includes: A quasi-static crush simulation is performed on each honeycomb barrier block of the preliminary collision honeycomb barrier model, and the node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results, so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset strength range, and the fourth curve is a crushing force-displacement curve.
[0038] In the embodiments of this specification, according to the requirements for the average strength of different areas of the collision honeycomb barrier, it is also necessary to perform node variable thickness processing on the preliminary collision honeycomb barrier model. Specifically, a quasi-static crush simulation is performed on each honeycomb barrier block in the model to obtain a fourth curve that characterizes the relationship between the crushing force and the displacement, and then the stiffness of the honeycomb barrier unit is adjusted by adjusting the node thickness, so as to adjust the shape of the fourth curve. The final adjustment goal is to make the preset proportion of the fourth curve within the preset strength range. The curve graph of the fourth curve during the adjustment process can be shown as follows: Figure 2 shown.
[0039] In one possible implementation, the node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation result so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset intensity range, including: The node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results, so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset strength range, and when the crushing force increases, the loading force remains unchanged or the increase range does not exceed the preset range.
[0040] In the embodiments of this specification, in addition to the fourth curve, the loading force of the model will also be read during the quasi-static crush simulation. In the process of adjusting the node thickness, in addition to keeping the fourth curve within the strength range, it is also necessary to ensure that the loading force remains unchanged as much as possible or can only increase slightly within a preset range during the gradual increase of the crushing force. Only the node thickness that meets the above two points is the final required node thickness. The node thickness obtained in this way not only meets the strength requirements, but also the loading force does not rise sharply under extreme crushing force, and the model is relatively convergent, which is of great help to the stability and accuracy of the model of the later honeycomb barrier under dynamic impact conditions.
[0041] S103, obtaining a first curve obtained after dynamic impact simulation of the collision honeycomb barrier model and a second curve obtained after dynamic impact trolley test of the physical barrier, and calculating difference data between the first curve and the second curve.
[0042] Wherein, the first curve and the second curve are both loading force-deformation curves.
[0043] In the embodiments of this specification, after the collision honeycomb barrier model is constructed, the model will be subjected to dynamic impact simulation to obtain the first curve of the model. At the same time, an actual dynamic impact trolley test will be performed on the relevant physical barrier to measure the corresponding second curve. Both the first curve and the second curve can include the loading force-deformation curve of the complete barrier and the loading force-deformation curve of each block. Then, the first curve will be compared with the second curve, such as Figure 3 As shown, the difference data corresponding to the difference between the curves is the impact force of the entrainment space enhancement on the honeycomb barrier.
[0044] S104, filling solid units into the honeycomb barrier area of the collision honeycomb barrier model, adjusting unit parameters of the solid units, making the third curve of the solid units match the difference data, and obtaining a complete honeycomb barrier model.
[0045] Wherein, the third curve is a stress-volume strain curve.
[0046] In the embodiment of this specification, in order to simulate the impact of collision force on entrained space enhancement, the cloud server will also fill a certain size of solid units in the honeycomb barrier area of the collision honeycomb barrier model, so as to equivalently simulate the entrained air enhancement characteristics through the material entity. After filling the solid unit, it is necessary to adjust the third curve of the solid unit by adjusting the unit parameters so that the third curve can match the difference data. Among them, the stress of the third curve can be regarded as the equivalent loading force and the volume strain can be regarded as the equivalent deformation. , In one possible implementation, the filling of solid units into the honeycomb barrier region of the collision honeycomb barrier model, adjusting the unit parameters of the solid units, making the third curve of the solid units match the difference data, and obtaining a complete honeycomb barrier model, comprises: Filling solid units into the honeycomb barrier region of the collision honeycomb barrier model so that the solid units overlap with the honeycomb barrier, the solid units being a constitutive model; The unit parameters of the entity unit are adjusted so that the third curve of the entity unit matches the difference data to obtain a complete honeycomb barrier model.
[0047] In the embodiments of this specification, the method of filling the solid unit is to overlap the solid unit with the honeycomb barrier in the modeling and simulation software, wherein the solid unit can be a constitutive model, specifically the MAT_CLOSED_CELL_FOAM material constitutive model can be selected, and the third curve of the solid unit, namely the stress-volume strain curve, is defined to be equivalent. The curve can be decomposed by the difference between the barrier test force and the simulation force without considering the air effect, that is, its force-displacement curve is evenly distributed on the AC-MDB barrier plane and converted into a relationship curve between stress and volume strain, such as Figure 4 In addition, in order to avoid the recovery of deformation of the solid unit due to external force unloading, the stress value of the tensile interval of the solid unit can be set to a larger value, such as 100-1000 times the compressive stress.
[0048] In one embodiment, the method further comprises: After adding at least one new collision speed condition, dynamic impact simulation is performed again on the complete honeycomb barrier model, and the complete honeycomb barrier model is verified according to the simulation results.
[0049] In the embodiments of the present specification, after obtaining the complete honeycomb barrier model, it can first be subjected to dynamic impact simulation again, and the newly simulated curve can be compared with the second curve again to determine whether the prediction accuracy of the simulation model meets the requirements. In addition, in order for the model to be able to simulate the mechanical characteristics of the collision honeycomb barrier under different impact conditions and accurately calculate the deformation of the honeycomb surface, in addition to obtaining the model according to a certain condition, it is also necessary to add a new collision speed condition to simulate again to further verify the accuracy of the complete honeycomb barrier model. For example, assume that the complete honeycomb barrier model is constructed according to the 50LCW condition, that is, the trolley hits the rigid wall at a speed of 50km / h. After obtaining the complete honeycomb barrier model, it can also be simulated and verified by the 40LCW condition, that is, the trolley hits the rigid wall at a speed of 40km / h. The obtained simulation result curve can be shown as follows. Figure 5 shown.
[0050] The following will be combined with the attached Figure 6, the entrained air enhancement simulation device for collision honeycomb barrier provided in the embodiment of the present application is introduced in detail. It should be noted that the attached Figure 6 The entrained air enhancement simulation device shown in the collision honeycomb barrier is used to implement the present application Figure 1 For the convenience of explanation, only the part related to the embodiment of the present application is shown. For the specific technical details not disclosed, please refer to the present application. Figure 1 The embodiment shown.
[0051] See also Figure 6 , Figure 6 Schematic diagram of the structure of a simulation device for entrained air enhancement that impacts a honeycomb barrier provided in an embodiment of the present application. Figure 6 As shown, the device comprises: The first construction module 601 is used to determine the honeycomb aluminum aperture based on preset design requirements, and to construct the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture; The second construction module 602 is used to perform finite element modeling according to the physical barrier size and the honeycomb aluminum shell unit to obtain a collision honeycomb barrier model; A calculation module 603 is used to obtain a first curve obtained after the collision honeycomb barrier model is subjected to dynamic impact simulation and a second curve obtained after the physical barrier is subjected to dynamic impact trolley test, and calculate the difference data between the first curve and the second curve, wherein the first curve and the second curve are both loading force-deformation curves; The adjustment module 604 is used to fill the honeycomb barrier area of the collision honeycomb barrier model with solid units, adjust the unit parameters of the solid units, make the third curve of the solid units match the difference data, and obtain a complete honeycomb barrier model, wherein the third curve is a stress-volume strain curve.
[0052] In one possible implementation, the first building module 601 is further specifically used for: The unit thickness of the honeycomb aluminum shell unit is adjusted according to the unit grid width of the finite element model.
[0053] In one possible implementation, the second building module 602 is specifically used to: Finite element modeling was performed based on the physical barrier size and honeycomb aluminum shell units to create a preliminary collision honeycomb barrier model; A sealing plate and a trolley are added to the preliminary collision honeycomb barrier model to obtain a collision honeycomb barrier model.
[0054] In one possible implementation, the second building module 602 is further configured to: A quasi-static crush simulation is performed on each honeycomb barrier block of the preliminary collision honeycomb barrier model, and the node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results, so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset strength range, and the fourth curve is a crushing force-displacement curve.
[0055] In one possible implementation, the second building module 602 is further configured to: The node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results, so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset strength range, and when the crushing force increases, the loading force remains unchanged or the increase range does not exceed the preset range.
[0056] In one possible implementation, the adjustment module 604 is specifically configured to: Filling solid units into the honeycomb barrier region of the collision honeycomb barrier model so that the solid units overlap with the honeycomb barrier, the solid units being a constitutive model; The unit parameters of the entity unit are adjusted so that the third curve of the entity unit matches the difference data to obtain a complete honeycomb barrier model.
[0057] In one embodiment, the device further comprises: The verification module is used to perform dynamic impact simulation on the complete honeycomb barrier model again after adding at least one new collision speed condition, and verify the complete honeycomb barrier model according to the simulation results.
[0058] Those skilled in the art can clearly understand that the technical solutions of the embodiments of the present application can be implemented with the help of software and / or hardware. The "unit" and "module" in this specification refer to software and / or hardware that can independently complete or cooperate with other components to complete specific functions, where the hardware can be, for example, a field programmable gate array (FPGA), an integrated circuit (IC), etc.
[0059] Each processing unit and / or module of the embodiments of the present application may be implemented by an analog circuit that implements the functions described in the embodiments of the present application, or may be implemented by software that executes the functions described in the embodiments of the present application.
[0060] See also Figure 7 , which shows a schematic diagram of the structure of an electronic device involved in an embodiment of the present application, the electronic device can be used to implement Figure 1 The method in the embodiment shown. Figure 7As shown, the electronic device 700 may include: at least one processor 701 , at least one network interface 704 , a user interface 703 , a memory 705 , and at least one communication bus 702 .
[0061] The communication bus 702 is used to realize the connection and communication between these components.
[0062] The user interface 703 may include a display screen (Display) and a camera (Camera). Optionally, the user interface 703 may also include a standard wired interface and a wireless interface.
[0063] The network interface 704 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).
[0064] Among them, the processor 701 may include one or more processing cores. The processor 701 uses various interfaces and lines to connect various parts of the entire electronic device 700, and executes various functions and processes data of the electronic device 700 by running or executing instructions, programs, code sets or instruction sets stored in the memory 705, and calling data stored in the memory 705. Optionally, the processor 701 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (ProgrammableLogic Array, PLA). The processor 701 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics central processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 701, and it can be implemented separately through a chip.
[0065] Among them, the memory 705 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 705 includes a non-transitory computer-readable storage medium. The memory 705 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 705 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 705 may optionally be at least one storage device located away from the aforementioned processor 701. As Figure 7 As shown, the memory 705 as a computer storage medium may include an operating system, a network communication module, a user interface module, and program instructions.
[0066] exist Figure 7 In the electronic device 700 shown, the user interface 703 is mainly used to provide an input interface for the user and obtain the data input by the user; and the processor 701 can be used to call the entrained air enhancement simulation application program of the collision honeycomb barrier stored in the memory 705, and specifically perform the following operations: Determine the honeycomb aluminum aperture based on the preset design requirements, and construct the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture; Finite element modeling was performed based on the physical barrier size and honeycomb aluminum shell units to obtain a collision honeycomb barrier model; Obtaining a first curve obtained after dynamic impact simulation of the collision honeycomb barrier model and a second curve obtained after a dynamic impact trolley test of the physical barrier, and calculating difference data between the first curve and the second curve, wherein the first curve and the second curve are both loading force-deformation curves; Filling solid units into the honeycomb barrier area of the collision honeycomb barrier model, adjusting the unit parameters of the solid units, making the third curve of the solid units match the difference data, and obtaining a complete honeycomb barrier model, wherein the third curve is a stress-volume strain curve.
[0067] The present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the above method are implemented. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a micro drive, and a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.
[0068] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.
[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0070] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.
[0071] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0072] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0073] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.
[0074] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by entering a program to instruct related hardware. The program may be stored in a computer-readable memory, and the memory may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.
[0075] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.
Claims
1. A method for simulating the enhanced entrained air impacting a honeycomb barrier, characterized in that: The method comprises: Determine the honeycomb aluminum aperture based on the preset design requirements, and construct the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture; Finite element modeling was performed based on the physical barrier size and honeycomb aluminum shell units to obtain a collision honeycomb barrier model; Obtaining a first curve obtained after dynamic impact simulation of the collision honeycomb barrier model and a second curve obtained after a dynamic impact trolley test of the physical barrier, and calculating difference data between the first curve and the second curve, wherein the first curve and the second curve are both loading force-deformation curves; Filling solid units into the honeycomb barrier area of the collision honeycomb barrier model, adjusting the unit parameters of the solid units, making the third curve of the solid units match the difference data, and obtaining a complete honeycomb barrier model, wherein the third curve is a stress-volume strain curve.
2. The method according to claim 1, characterized in that After constructing the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture, it also includes: The unit thickness of the honeycomb aluminum shell unit is adjusted according to the unit grid width of the finite element model.
3. The method according to claim 1, characterized in that: The finite element modeling is performed according to the physical barrier size and the honeycomb aluminum shell unit to obtain the collision honeycomb barrier model, including: Finite element modeling was performed based on the physical barrier size and honeycomb aluminum shell units to create a preliminary collision honeycomb barrier model; A sealing plate and a trolley are added to the preliminary collision honeycomb barrier model to obtain a collision honeycomb barrier model.
4. The method according to claim 3, characterized in that The finite element modeling is performed based on the physical barrier size and the honeycomb aluminum shell unit, and after the preliminary collision with the honeycomb barrier model, it also includes: A quasi-static crush simulation is performed on each honeycomb barrier block of the preliminary collision honeycomb barrier model, and the node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results, so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset strength range, and the fourth curve is a crushing force-displacement curve.
5. The method according to claim 4, characterized in that The step of adjusting the node thickness of the preliminary collision honeycomb barrier model according to the simulation result so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset intensity range includes: The node thickness of the preliminary collision honeycomb barrier model is adjusted according to the simulation results, so that the fourth curve of the preliminary collision honeycomb barrier model is within a preset strength range, and when the crushing force increases, the loading force remains unchanged or the increase range does not exceed the preset range.
6. The method according to claim 1, characterized in that The step of filling the honeycomb barrier region of the collision honeycomb barrier model with solid units, adjusting the unit parameters of the solid units, and matching the third curve of the solid units with the difference data to obtain a complete honeycomb barrier model includes: Filling solid units into the honeycomb barrier region of the collision honeycomb barrier model so that the solid units overlap with the honeycomb barrier, the solid units being a constitutive model; The unit parameters of the entity unit are adjusted so that the third curve of the entity unit matches the difference data to obtain a complete honeycomb barrier model.
7. The method according to claim 1, characterized in that The method further comprises: After adding at least one new collision speed condition, dynamic impact simulation is performed again on the complete honeycomb barrier model, and the complete honeycomb barrier model is verified according to the simulation results.
8. An entrained air enhancement simulation device that impacts a honeycomb barrier, characterized in that: The device comprises: The first construction module is used to determine the honeycomb aluminum aperture based on preset design requirements, and to construct the honeycomb aluminum shell unit using quadrilateral shell units according to the honeycomb aluminum aperture; The second building module is used to perform finite element modeling according to the physical barrier size and the honeycomb aluminum shell unit to obtain a collision honeycomb barrier model; A calculation module, used for obtaining a first curve obtained after the collision honeycomb barrier model is subjected to dynamic impact simulation and a second curve obtained after the physical barrier is subjected to dynamic impact trolley test, and calculating difference data between the first curve and the second curve, wherein the first curve and the second curve are both loading force-deformation curves; An adjustment module is used to fill solid units into the honeycomb barrier area of the collision honeycomb barrier model, adjust the unit parameters of the solid units, make the third curve of the solid units match the difference data, and obtain a complete honeycomb barrier model, wherein the third curve is a stress-volume strain curve.
9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.
10. A computer-readable storage medium having a computer program stored thereon, wherein the computer-readable storage medium has instructions stored therein, and when the instructions are executed on a computer or a processor, the computer or the processor executes the steps of the method according to any one of claims 1 to 7.