A method for analyzing the safety performance of seat backrests

Abstract

The embodiment of the present invention discloses a method for analyzing the safety performance of a seat backrest, which uses the rules of simulating the whole vehicle collision test in CAE analysis software to simulate the force of the seat model, thereby calculating the normal force of the seat belt model perpendicular to the adjustment handle model, and then comparing the normal force of the seat belt model perpendicular to the adjustment handle model with the design unlocking force of the adjustment handle to judge the safety performance of the seat to be analyzed. This method simulates and analyzes the movement process of the seat belt waist belt at the junction of the backrest adjustment handle and the side cover of the seat cushion during the collision in CAE analysis software, and quickly checks the matching of the backrest adjustment handle and the side cover of the seat cushion, avoiding the change of the seat-related structure caused by the backrest unlocking problem in the later stage and repeated actual vehicle collision test verification, which greatly reduces the seat development cost and can effectively shorten the development cycle.

Description

Technical Field

[0001] The invention relates to the technical field of safety performance evaluation of automobile seats, and in particular to a method for analyzing the safety performance of a seat back. Background Art

[0002] The seat is one of the important components of the passive safety restraint system of the car. It is generally composed of a headrest, a backrest, a cushion and related frames. Its function is to provide stable support for the occupants during a car collision, thereby protecting the occupants' safety. However, during the product design process of the seat, it was found that when the design and matching of the seat back adjustment handle and the side cover of the seat cushion are unreasonable, it is easy to cause the seat belt to slide into the end face of the back adjustment handle during a collision, causing the backrest to be unlocked, which increases the risk of occupant injury. In the later stage of product design, the problem of backrest unlocking can only be solved by optimizing the seat shape, re-changing the mold, and repeatedly conducting collision tests and verifications. Obviously, the cost of seat development has increased significantly. Summary of the invention

[0003] In order to solve the existing technical problems, an embodiment of the present invention provides a method for analyzing the safety performance of a seat backrest. The movement process of the seat belt lap belt at the junction of the backrest adjustment handle and the seat cushion side cover during a collision is simulated and analyzed in the CAE analysis software. The method quickly checks the matching of the backrest adjustment handle and the seat cushion side cover to avoid changes in seat-related structures and repeated tests and verifications caused by backrest unlocking problems in the later stage, which greatly reduces the seat development cost and can effectively shorten the development cycle.

[0004] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0005] An embodiment of the present invention provides a method for analyzing the safety performance of a seat back, the method comprising:

[0006] According to the R point information and adjustment travel range of the seat to be analyzed, and in accordance with the vehicle collision test rules, the position of the seat model and the position of the dummy model are located in the CAE analysis software, wherein the seat model includes the backrest adjustment handle model and the seat cushion side cover model;

[0007] According to the positions of the seat belt retractor outlet, D-ring, buckle and seat belt anchor point relative to the seat to be analyzed, and in accordance with the vehicle collision test rules, the position of the seat belt model relative to the seat model and the dummy model is located in the CAE analysis software, wherein the seat belt model includes the lap belt model;

[0008] According to the position of the safety belt model relative to the seat model and the dummy model, determine the initial position of the lap belt model on the backrest adjustment handle model;

[0009] The whole vehicle collision process is simulated in CAE analysis software using the seat model, dummy model and seat belt model. In this process, in response to the waist belt model sliding into the end surface of the backrest adjustment handle model, the normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated;

[0010] The safety performance of the seat to be analyzed is determined by comparing the normal force of the seat belt model perpendicular to the backrest adjustment handle model and the designed unlocking force of the backrest adjustment handle.

[0011] Preferably, the calculation of the normal force of the seat belt model perpendicular to the backrest adjustment handle model includes:

[0012] The horizontal contact force and vertical contact force between the seat belt model and the backrest adjustment handle model are calculated in the CAE analysis software;

[0013] Determine the rotation design angle of the backrest adjustment handle according to the model of the seat to be analyzed;

[0014] According to the horizontal contact force and the vertical contact force and the rotation design angle of the backrest adjustment handle, the normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated.

[0015] Preferably, the positioning of the seat model and the dummy model in CAE according to the R point information and the adjustment travel range of the seat to be analyzed and the vehicle collision test rules includes:

[0016] Receiving manually inputted model of the seat to be analyzed, and determining R point information and adjustment travel range of the seat according to the model of the seat to be analyzed;

[0017] According to the R point information and adjustment travel range of the seat to be analyzed and in accordance with the vehicle collision test rules, the position of the seat model and the position of the dummy model are located in CAE.

[0018] Preferably, the seat model, R-point information and adjustment travel range, as well as the designed unlocking force of the backrest adjustment handle are all built-in data.

[0019] Preferably, the seat model, dummy model and seat belt model are all built-in model data.

[0020] The embodiment of the present invention further provides a device for analyzing the safety performance of a seat back, comprising:

[0021] The first positioning module is used to locate the position of the seat model and the position of the dummy model in the CAE analysis software according to the R point information and the adjustment travel range of the seat to be analyzed and the vehicle collision test rules;

[0022] The second positioning module is used to locate the position of the seat belt model relative to the seat model and the dummy model in the CAE analysis software according to the positions of the seat belt retractor outlet, D-ring, buckle and seat belt anchor point relative to the seat to be analyzed and in accordance with the vehicle collision test rules;

[0023] A determination module, used for determining an initial position of the lap belt model on the backrest adjustment handle model according to the position of the seat belt model relative to the seat model and the dummy model;

[0024] A simulation calculation module is used to simulate the whole vehicle collision process in CAE analysis software by using the seat model, the dummy model and the seat belt model. In this process, in response to the waist belt model sliding into the end surface of the backrest adjustment handle model, the normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated;

[0025] The comparison and judgment module is used to compare the normal force of the seat belt model perpendicular to the backrest adjustment handle model and the designed unlocking force of the backrest adjustment handle to judge the safety performance of the seat to be analyzed.

[0026] An embodiment of the present invention further provides a computer device, comprising: a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is used to implement the method described in item when running the computer program.

[0027] The embodiment of the present invention further provides a computer storage medium storing an executable program, and when the executable program is executed by a processor, the method described is implemented.

[0028] The above-mentioned embodiment provides a method for analyzing the safety performance of a seat back, which simulates and analyzes the movement of a seat belt at the junction of a backrest adjustment handle and a seat cushion side cover during a collision in CAE analysis software, and quickly verifies the matching of the backrest adjustment handle and the seat cushion side cover, thereby avoiding changes in seat-related structures caused by backrest unlocking problems in the later stage and repeated actual vehicle collision test verification, greatly reducing the seat development cost and effectively shortening the development cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a flow chart of a method provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the structure of a seat model, a dummy model and a seat belt model positioned in CAE analysis software provided by an embodiment of the present invention;

[0031] Figure 3 A force analysis diagram of a seat model, a dummy model and a seat belt model provided in one embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the basic state structure of a seat model provided by an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the structure of a seat model after optimization of the first solution provided by an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the structure of the seat model after optimization of the second solution provided by one embodiment of the present invention;

[0035] Figure 7 A schematic diagram of the structure of the seat model after optimization of the third solution provided by one embodiment of the present invention;

[0036] Figure 8 A schematic diagram of seat structure optimization and analysis results provided by an embodiment of the present invention;

[0037] Fig. 9 A schematic diagram of the structure of a device provided by an embodiment of the present invention;

[0038] Fig.10 A schematic diagram of the structure of a computer device provided by an embodiment of the present invention; DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] A method for analyzing the safety performance of a seat back provided in an embodiment of the present invention belongs to the technical field of safety performance evaluation of automobile seats, and the application scenario can be: safety performance evaluation of seat design in automobile passive safety and other scenarios. It can be understood that in the prior art, a seat is one of the important components of a passive safety restraint system of an automobile, and is generally composed of a headrest, a backrest, a seat cushion and a related frame. Its function is to provide stable support for the occupants during a car collision, thereby protecting the safety of the occupants. However, in the product design process of the seat, it was found that when the design matching of the seat back adjustment handle and the side cover of the seat cushion is unreasonable, it is easy to cause the seat belt to slide into the end face of the back adjustment handle during a collision, causing the backrest to be unlocked, and there is a risk of increasing occupant injury. In the later stage of product design, the problem of backrest unlocking can only be solved by optimizing the seat shape, re-changing the mold, and repeatedly performing collision tests and verifications, and the cost of seat development is obviously increased.

[0042] Based on this, how to reduce the cost of safety performance evaluation of car seats has become a technical problem that needs to be solved urgently.

[0043] It should be noted that the method is performed by a computer device. It should be noted that the computer device here refers to any device with a computing and processing function, including but not limited to a fixed terminal device or a mobile terminal device. The fixed terminal device may include but is not limited to a desktop computer or a computer device, and the mobile terminal device may include but is not limited to a mobile phone, a tablet computer, a wearable device or a laptop computer, etc.

[0044] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] refer to Figure 1 , an embodiment of the present invention provides a method for analyzing the safety performance of a seat back, the method comprising:

[0046] S11: According to the R point information and the adjustment travel range of the seat to be analyzed and in accordance with the vehicle collision test rules, the position of the seat model and the position of the dummy model are located in the CAE analysis software, wherein the seat model includes a backrest adjustment handle model and a seat cushion side cover model;

[0047] S12: according to the positions of the seat belt retractor outlet, the D-ring, the buckle and the seat belt anchor point relative to the seat to be analyzed, and in accordance with the vehicle collision test rules, locate the position of the seat belt model relative to the seat model and the dummy model in the CAE analysis software, wherein the seat belt model includes a lap belt model;

[0048] S13: determining an initial position of the lap belt model on the backrest adjustment handle model according to the position of the seat belt model relative to the seat model and the dummy model;

[0049] S14: using the seat model, the dummy model and the seat belt model to simulate the whole vehicle collision process in the CAE analysis software, in this process, in response to the waist belt model sliding into the end surface of the backrest adjustment handle model, the normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated;

[0050] S15: Compare the normal force of the seat belt model perpendicular to the backrest adjustment handle model and the designed unlocking force of the backrest adjustment handle to determine the safety performance of the seat to be analyzed.

[0051] refer to Figure 2 , Figure 2 This is a structural schematic diagram of the seat model, dummy model and seat belt model located in the CAE analysis software, in which there are a dummy model 4, a backrest adjustment handle model 1, a seat cushion side cover model 3 and a waist belt model 2.

[0052] For example, in the CAE analysis software, according to the actual vehicle collision test situation, the seat model, dummy model, backrest adjustment handle model, seat cushion side cover model, seat belt model and lap belt model are retrieved and positioned, and then the forces on the previous models are simulated using the rules for simulating the vehicle collision test in the CAE analysis software, and then the forces are calculated to obtain the normal force of the seat belt model perpendicular to the backrest adjustment handle model, and then, the normal force of the seat belt model perpendicular to the backrest adjustment handle model and the designed unlocking force of the backrest adjustment handle are compared to judge the safety performance of the seat to be analyzed.

[0053] Specifically, in one case, refer to Figure 3 and Figure 4 , the rotation design angle θ of the backrest adjustment handle is 14.7°. When the seat structure is in the basic state, the calculated positive normal force Fn of the seat belt perpendicular to the backrest adjustment handle is 51.2N, which is greater than the design unlocking force Fd (30N) of the backrest adjustment handle. There is indeed a risk of backrest unlocking, so it is necessary to reasonably optimize the seat structure; after optimizing the seat structure, the optimized seat structure reference Figure 5 , optimized the side cover of the seat cushion, analyzed and calculated the positive normal force Fn to be 35.5N, which is greater than the design unlocking force Fd (30N) of the backrest adjustment handle, and there is still an unlocking risk; the seat structure will continue to be optimized in the future, and the optimized seat structure will refer to Figure 6 and Figure 7 The Fn calculated by analysis is 0N, and there is no risk of unlocking the backrest. Figure 6 The seat structure and shape of the current model are quite different from the overall interior style of the current model, and the match is unreasonable, so the use of Figure 7 The seat structure and shape of the seat. Figure 3 and Figure 4 The seat structure is the basic state. Figure 5This is the seat structure of Scheme 1. Figure 6 This is the seat structure of Option 2. Figure 7 This is the seat structure of option three.

[0054] In general, this method simulates and analyzes the movement of the seat belt at the junction of the backrest adjustment handle and the seat cushion side cover during a collision in the CAE analysis software, and quickly verifies the matching of the backrest adjustment handle and the seat cushion side cover, thereby avoiding changes in seat-related structures caused by backrest unlocking problems in the later stage and repeated actual vehicle collision test verification, which greatly reduces the seat development cost and can effectively shorten the development cycle.

[0055] In some embodiments, the calculating of the normal force of the seat belt model perpendicular to the backrest adjustment handle model includes:

[0056] The horizontal contact force and vertical contact force between the seat belt model and the backrest adjustment handle model are calculated in the CAE analysis software;

[0057] Determine the rotation design angle of the backrest adjustment handle according to the model of the seat to be analyzed;

[0058] According to the horizontal contact force and the vertical contact force and the rotation design angle of the backrest adjustment handle, the normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated.

[0059] Exemplary, reference Figure 3 The specific process of the above embodiment is as follows:

[0060] 1. Fx is the horizontal X-direction contact force between the seat belt and the backrest adjustment handle, Fz is the vertical Z-direction contact force between the seat belt and the backrest adjustment handle, Fn is the normal force of the seat belt perpendicular to the backrest adjustment handle, Fa is the axial force of the seat belt parallel to the backrest adjustment handle, θ is the angle between the line connecting the end face of the backrest adjustment handle and the rotation center and the horizontal direction, that is, the rotation design angle of the backrest adjustment handle, and Fd is the design unlocking force of the backrest adjustment handle; the contact forces Fx and Fz between the seat belt and the backrest adjustment handle are decomposed as follows:

[0061]

[0062]

[0063] 2. When the normal force of the seat belt perpendicular to the backrest adjustment handle is positive and greater than the designed unlocking force of the handle, there is a risk of the backrest adjustment handle being unlocked. Therefore, the backrest should at least meet the following conditions to prevent unlocking:

[0064]

[0065] 3. If the calculated normal force Fn of the seat belt perpendicular to the backrest adjustment handle is greater than the handle design unlocking force Fd, repeat the above analysis steps by optimizing the backrest adjustment handle structure and the seat cushion side cover structure until the backrest adjustment performance test requirements are met.

[0066] In some embodiments, locating the position of the seat model and the position of the dummy model in CAE according to the R point information and the adjustment travel range of the seat to be analyzed and the vehicle collision test rules includes:

[0067] Receiving manually inputted model of the seat to be analyzed, and determining R point information and adjustment travel range of the seat according to the model of the seat to be analyzed;

[0068] According to the R point information and adjustment travel range of the seat to be analyzed and in accordance with the vehicle collision test rules, the position of the seat model and the position of the dummy model are located in CAE.

[0069] It should be noted that the seat model, R-point information and adjustment travel range, as well as the designed unlocking force of the backrest adjustment handle are all built-in data.

[0070] It should be noted that the seat model, dummy model and seat belt model are all built-in model data. When used, the model data can be retrieved according to the seat model to be evaluated, which speeds up the calculation process.

[0071] like Fig. 9 As shown, an embodiment of the present invention further provides a device for analyzing the safety performance of a seat back, comprising:

[0072] A first positioning module 91 is used to locate the position of the seat model and the position of the dummy model in the CAE analysis software according to the R point information and the adjustment travel range of the seat to be analyzed and in accordance with the vehicle collision test rules;

[0073] A second positioning module 92 is used to locate the position of the seat belt model relative to the seat model and the dummy model in the CAE analysis software according to the positions of the seat belt retractor outlet, the D-ring, the buckle and the seat belt anchor point relative to the seat to be analyzed and in accordance with the vehicle collision test rules;

[0074] A determination module 93, for determining an initial position of the lap belt model on the backrest adjustment handle model according to the position of the seat belt model relative to the seat model and the dummy model;

[0075] A simulation calculation module 94 is used to simulate the whole vehicle collision process in CAE analysis software using the seat model, the dummy model and the seat belt model. In this process, in response to the waist belt model sliding into the end surface of the backrest adjustment handle model, a normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated;

[0076] The comparison and judgment module 95 is used to compare the normal force of the seat belt model perpendicular to the backrest adjustment handle model and the designed unlocking force of the backrest adjustment handle to judge the safety performance of the seat to be analyzed.

[0077] It should be noted that the description of the above device items is similar to the description of the above method items, and the description of the beneficial effects of the same method is not repeated. For technical details not disclosed in the device embodiment of the present invention, please refer to the description of the method embodiment of the present invention.

[0078] The present invention also provides a specific embodiment, referring to Figure 2-8 , in order to further understand this method.

[0079] At present, the matching design of the seat back adjustment handle and the side cover of the seat cushion only considers the strength of the seat connector, the comfort of wearing the seat belt and the aesthetics of the interior design, while ignoring the risk of the back adjustment handle being unlocked during a collision. The backrest unlocking problem is usually tested through actual slide and vehicle collision tests, which has high test costs and long inspection cycles. The application of the present invention can detect the backrest unlocking problem in the early stage of design, greatly reducing the matching design risk of the backrest adjustment handle and the side cover of the seat cushion.

[0080] The initial plan for the seat back adjustment handle and seat cushion side cover of a certain model in this case is shown in Figure 3 The design rotation angle θ of the backrest adjustment handle is 14.7°. The basic scheme is used to conduct a tooling collision test. After the test, it is observed that the seat belt slides into the gap between the backrest adjustment handle and the side cover of the seat cushion. The backrest has been unlocked and tilted forward seriously. In view of this problem, the analysis method of the present invention is applied to calculate that the positive normal force Fn of the seat belt perpendicular to the backrest adjustment handle is 51.2N, which is greater than the design unlocking force Fd (30N) of the backrest adjustment handle. There is indeed a risk of backrest unlocking. Therefore, it is necessary to reasonably optimize the seat structure. Figure 4 Option 1: Optimize the side cover of the seat cushion. Figure 6 and Figure 7 They are Option 2 and Option 3: both optimize the seat cushion side cover and the backrest adjustment handle structure. Fn is calculated and compared with Fd to determine the backrest unlocking risk. For specific results, see Figure 8. For Scheme 1, during the collision simulation, the seat belt slid into the gap between the backrest adjustment handle and the side cover of the seat cushion. The forward normal force Fn was calculated to be 35.5N, which was greater than the design unlocking force Fd (30N) of the backrest adjustment handle. There was still an unlocking risk. The seat structure was subsequently optimized. The Fn calculated for Schemes 2 and 3 was 0N, and there was no unlocking risk for the backrest. Since the styling of Scheme 2 was quite different from the overall interior styling style of the vehicle and the match was unreasonable, Scheme 3 was used for collision test verification. The final test results showed that the backrest was not unlocked.

[0081] like Fig.10 As shown, an embodiment of the present invention further provides a computer device, including a processor 101 and a memory 102 for storing a computer program that can be run on the processor, wherein the processor is used to implement the method described above when running the computer program.

[0082] In some embodiments, the memory 102 in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDRSDRAM), enhanced synchronous DRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus DRAM (DRRAM). The memory 102 of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0083] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 101. The above processor 101 may be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor are combined to be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 102, and the processor 101 reads the information in the memory 102 and completes the steps of the above method in combination with its hardware.

[0084] In some embodiments, the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present application, or a combination thereof.

[0085] For software implementation, the techniques described herein can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0086] Another embodiment of the present invention provides a computer storage medium, the computer readable storage medium stores an executable program, and when the executable program is executed by the processor 101, the steps applied to the method can be implemented. Figure 1 One or more of the methods shown.

[0087] In some embodiments, the computer storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0088] It should be noted that the technical solutions described in the embodiments of the present invention can be combined arbitrarily without conflict.

[0089] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for analyzing the safety performance of a seat back, characterized in that: The method comprises: According to the R point information and adjustment travel range of the seat to be analyzed, and in accordance with the vehicle collision test rules, the position of the seat model and the position of the dummy model are located in the CAE analysis software, wherein the seat model includes the backrest adjustment handle model and the seat cushion side cover model; According to the positions of the seat belt retractor outlet, D-ring, buckle and seat belt anchor point relative to the seat to be analyzed, and in accordance with the vehicle collision test rules, the position of the seat belt model relative to the seat model and the dummy model is located in the CAE analysis software, wherein the seat belt model includes the lap belt model; According to the position of the safety belt model relative to the seat model and the dummy model, determine the initial position of the lap belt model on the backrest adjustment handle model; The whole vehicle collision process is simulated in CAE analysis software using the seat model, dummy model and seat belt model. In this process, in response to the waist belt model sliding into the end surface of the backrest adjustment handle model, the normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated; The safety performance of the seat to be analyzed is determined by comparing the normal force of the seat belt model perpendicular to the backrest adjustment handle model and the designed unlocking force of the backrest adjustment handle.

2. The method according to claim 1, characterized in that The calculation to obtain the normal force of the seat belt model perpendicular to the backrest adjustment handle model includes: The horizontal contact force and vertical contact force between the seat belt model and the backrest adjustment handle model are calculated in the CAE analysis software; Determine the rotation design angle of the backrest adjustment handle according to the model of the seat to be analyzed; According to the horizontal contact force and the vertical contact force and the rotation design angle of the backrest adjustment handle, the normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated.

3. The method according to claim 1, characterized in that The method of locating the position of the seat model and the position of the dummy model in CAE according to the R point information and the adjustment travel range of the seat to be analyzed and the vehicle collision test rules includes: Receiving manually inputted model of the seat to be analyzed, and determining R point information and adjustment travel range of the seat according to the model of the seat to be analyzed; According to the R point information and adjustment travel range of the seat to be analyzed and in accordance with the vehicle collision test rules, the position of the seat model and the position of the dummy model are located in CAE.

4. The method according to claim 3, characterized in that The seat model, R-point information and adjustment travel range, as well as the designed unlocking force of the backrest adjustment handle are all built-in data.

5. The method according to claim 1, characterized in that: The seat model, dummy model and seat belt model are all built-in model data.

6. A device for analyzing the safety performance of a seat back, implementing the method for analyzing the safety performance of a seat back as claimed in any one of claims 1 to 5, characterized in that: include: The first positioning module is used to locate the position of the seat model and the position of the dummy model in the CAE analysis software according to the R point information and the adjustment travel range of the seat to be analyzed and the vehicle collision test rules; The second positioning module is used to locate the position of the seat belt model relative to the seat model and the dummy model in the CAE analysis software according to the positions of the seat belt retractor outlet, D-ring, buckle and seat belt anchor point relative to the seat to be analyzed and in accordance with the vehicle collision test rules; A determination module, used for determining an initial position of the lap belt model on the backrest adjustment handle model according to the position of the seat belt model relative to the seat model and the dummy model; A simulation calculation module is used to simulate the whole vehicle collision process in CAE analysis software by using the seat model, the dummy model and the seat belt model. In this process, in response to the waist belt model sliding into the end surface of the backrest adjustment handle model, the normal force of the seat belt model perpendicular to the backrest adjustment handle model is calculated; The comparison and judgment module is used to compare the normal force of the seat belt model perpendicular to the backrest adjustment handle model and the designed unlocking force of the backrest adjustment handle to judge the safety performance of the seat to be analyzed.

7. A computer device, characterized in that: include: A processor and a memory for storing a computer program that can be run on the processor, wherein the processor implements the method according to any one of claims 1 to 5 when running the computer program.

8. A computer storage medium, characterized in that: An executable program is stored, and when the executable program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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