Automobile bumper lateral pressure simulation simplified analysis method and device

Abstract

The application relates to the technical field of automobiles, in particular to a simulation simplified analysis method and device for lateral pressure of an automobile bumper, which comprises the following steps: when a target vehicle is in a low-temperature and low-speed test working condition, a target bumper body is intercepted to a target length, and a vehicle simulation simplified analysis model is built according to the bumper body and material properties thereof; a first target stress interval of the bumper body and at least one lateral connecting bolt is determined through the model, the first target stress interval is compared with a second target stress interval obtained from a preset whole-vehicle simulation analysis model, and stress and deformation results of the bumper body and the lateral connecting bolt are output according to a comparison result. Therefore, the problems that in the related art, the research scene and analysis dimension of bumper stress are obviously limited, the actual guiding value of stress analysis results for engineering design is reduced, and the demand of bumper multi-working-condition structure design and safety checking cannot be met are solved.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to a simplified analysis method and apparatus for simulating lateral pressure on automotive bumpers. Background Technology

[0002] Current research on the stress of automotive bumpers mainly focuses on surface stiffness and the verification of local stiffness and strength under the pressure of the indenter. Some studies also focus on the stress changes of the bumper assembly caused by icing conditions. These studies are often carried out through simulation analysis and rely on adjusting structural parameters and local thickening to optimize the performance of the bumper. Overall, no specific research has been conducted on the stress of the bumper in low-temperature environments.

[0003] Therefore, the research scenarios and analysis dimensions of bumper stress in related technologies are obviously limited, and there is a lack of systematic consideration for stress analysis under multiple working conditions. As a result, the bumper structural design can only refer to the stress data of a single or a few scenarios, which reduces the comprehensive guiding value of the stress analysis results for actual engineering design, and this needs to be solved urgently. Summary of the Invention

[0004] This application provides a simplified analysis method and apparatus for simulating lateral pressure on automotive bumpers, which addresses the significant limitations in the research scenarios and analysis dimensions of bumper forces in related technologies. This reduces the practical guiding value of the force analysis results for engineering design and fails to meet the needs of multi-condition structural design and safety verification of bumpers.

[0005] The first aspect of this application provides a simplified simulation analysis method for the lateral pressure of an automobile bumper, comprising the following steps: when the target vehicle is under test conditions where the target temperature is lower than a preset temperature and the target vehicle speed is lower than a preset vehicle speed, the target bumper body of the target vehicle is cut into a target length; based on the target length of the bumper body and the material properties of the target length of the bumper body, a simplified vehicle simulation analysis model is established; based on the simplified vehicle simulation analysis model, a first target stress range of the target length of the bumper body and at least one lateral connecting bolt is determined, and the first target stress range is compared with a second target stress range of the target bumper body and at least one lateral connecting bolt obtained by the target vehicle based on the preset vehicle simulation analysis model, so as to output the stress and deformation results of the target bumper body and at least one lateral connecting bolt according to the comparison results.

[0006] Based on the above technical means, the embodiments of this application can establish a simplified analysis model by cutting the target length of the bumper and comparing it with the whole vehicle simulation range, which not only improves the simulation efficiency but also ensures the accuracy of the results, providing a reliable basis for bumper structure design and safety verification.

[0007] Optionally, in one embodiment of this application, before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained by the target vehicle based on a preset vehicle simulation analysis model, the method further includes: when the target vehicle is under the test condition, acquiring the lateral pressure of the target vehicle under static friction and the material properties of the target bumper body of the target vehicle; establishing a vehicle simulation analysis model based on the lateral pressure and the material properties of the target bumper body; using the vehicle simulation analysis model to perform lateral pressure simulation analysis on the target vehicle to obtain a first simulation analysis result; and determining the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis result.

[0008] Based on the above technical means, the embodiments of this application can accurately obtain the lateral pressure and bumper material properties based on the test conditions, and determine the second target stress range through whole vehicle simulation analysis, providing a realistic, accurate and reliable benchmark for subsequent stress range comparison, and ensuring the engineering reference value of the final analysis results.

[0009] Optionally, in one embodiment of this application, determining the first target stress range of the bumper body of the target length and at least one lateral connecting bolt based on the vehicle simulation simplified analysis model includes: setting the material properties corresponding to the bumper body of the target length, and simulating the bolts connecting the bumper body of the target length to the wheel arches and fenders of the target vehicle using at least one beam element to establish the vehicle simulation simplified analysis model; applying lateral pressure at a target angle to the bumper body of the target length based on the vehicle simulation simplified analysis model, wherein the pressure-bearing area of ​​the bumper body of the target length is a preset pressure-bearing area, to perform a simulation simplified analysis on the target vehicle; and determining the first target stress range of the bumper body of the target length and at least one lateral connecting bolt based on the simulation simplified analysis results.

[0010] Based on the above technical means, the embodiments of this application can model and simulate by accurately setting the low-temperature material properties, restoring the bolt connection with beam elements and loading lateral pressure according to the standard working conditions, so as to efficiently and accurately determine the first target stress range and provide accurate data support that fits the actual working conditions for subsequent range comparison.

[0011] Optionally, in one embodiment of this application, before determining the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis result, the method further includes: setting the material properties corresponding to the target bumper body, and simulating the bolts connecting the target bumper body to the wheel arches and fenders of the target vehicle using at least one beam element to establish the vehicle simulation analysis model; based on the vehicle simulation analysis model, applying a lateral pressure of a target angle to the target bumper body, wherein the pressure-bearing area of ​​the target bumper body is a preset pressure-bearing area, to perform simulation analysis on the target vehicle and obtain the first simulation analysis result.

[0012] Based on the above technical means, the embodiments of this application can build a whole vehicle simulation model by matching the corresponding material properties of the bumper, accurately simulating the bolt connection with beam units, and applying lateral pressure according to the standard working conditions to complete the simulation, providing realistic and reliable simulation data support for the subsequent determination of the second target stress range.

[0013] Optionally, in one embodiment of this application, determining the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis result includes: applying lateral pressure of the target angle to the bumper body of another vehicle based on the vehicle simulation analysis model to perform simulation analysis on the other vehicle and obtain the second simulation analysis result of the other vehicle; and determining the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis result and the second simulation analysis result of the other vehicle.

[0014] Based on the above technical means, the embodiments of this application can determine the second target stress range by integrating the side pressure simulation analysis results of the target vehicle and other vehicles, expanding the sample size, making the range more universal and reliable, and providing a solid and comprehensive benchmark for subsequent stress range comparison.

[0015] A second aspect of this application provides a simplified simulation analysis device for the lateral pressure of an automobile bumper, comprising: a processing module, configured to extract a target length of the target bumper body of the target vehicle when the target vehicle is under test conditions where the target temperature is lower than a preset temperature and the target vehicle speed is lower than a preset vehicle speed; a modeling module, configured to establish a simplified vehicle simulation analysis model based on the target length of the bumper body and the material properties of the target length of the bumper body; and an analysis module, configured to determine a first target stress range of the target length of the bumper body and at least one lateral connecting bolt based on the simplified vehicle simulation analysis model, and compare the first target stress range with a second target stress range of the target bumper body and at least one lateral connecting bolt obtained by the target vehicle based on a preset vehicle simulation analysis model, so as to output the stress and deformation results of the target bumper body and at least one lateral connecting bolt according to the comparison results.

[0016] Based on the above technical means, the embodiments of this application can establish a simplified analysis model by cutting the target length of the bumper and comparing it with the whole vehicle simulation range, which not only improves the simulation efficiency but also ensures the accuracy of the results, providing a reliable basis for bumper structure design and safety verification.

[0017] Optionally, in one embodiment of this application, the apparatus further includes: a first acquisition module, configured to, before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained based on a preset vehicle simulation analysis model, acquire the lateral pressure of the target vehicle under static friction and the material properties of the target bumper body when the target vehicle is in the test condition; and a first establishment module, configured to, before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained based on a preset vehicle simulation analysis model, acquire the lateral pressure and the material properties of the target bumper body. The material properties are used to establish a vehicle simulation analysis model; the second acquisition module is used to perform lateral pressure simulation analysis on the target vehicle using the vehicle simulation analysis model before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained by the target vehicle based on the preset vehicle simulation analysis model, and obtain a first simulation analysis result; the determination module is used to determine the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis result before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained by the preset vehicle simulation analysis model.

[0018] Based on the above technical means, the embodiments of this application can accurately obtain the lateral pressure and bumper material properties based on the test conditions, and determine the second target stress range through whole vehicle simulation analysis, providing a realistic, accurate and reliable benchmark for subsequent stress range comparison, and ensuring the engineering reference value of the final analysis results.

[0019] Optionally, in one embodiment of this application, the analysis module includes: a setting unit, configured to set the material properties corresponding to the bumper body of the target length, and simulate the bolts connecting the bumper body of the target length to the wheel arches and fenders of the target vehicle through at least one beam element to establish a simplified simulation analysis model of the vehicle; a processing unit, configured to apply lateral pressure of a target angle to the bumper body of the target length based on the simplified simulation analysis model of the vehicle, wherein the pressure-bearing area of ​​the bumper body of the target length is a preset pressure-bearing area, to perform a simplified simulation analysis of the target vehicle; and a first determining unit, configured to determine the first target stress range of the bumper body of the target length and at least one lateral connecting bolt based on the simplified simulation analysis results.

[0020] Based on the above technical means, the embodiments of this application can model and simulate by accurately setting the low-temperature material properties, restoring the bolt connection with beam elements and loading lateral pressure according to the standard working conditions, so as to efficiently and accurately determine the first target stress range and provide accurate data support that fits the actual working conditions for subsequent range comparison.

[0021] Optionally, in one embodiment of this application, the apparatus further includes: a second establishment module, configured to, before determining the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis result, set the material properties corresponding to the target bumper body, and simulate the bolts connecting the target bumper body to the wheel arches and fenders of the target vehicle using at least one beam element to establish the vehicle simulation analysis model; and a third acquisition module, configured to, before determining the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis result, apply a lateral pressure of a target angle to the target bumper body based on the vehicle simulation analysis model, wherein the pressure-bearing area of ​​the target bumper body is a preset pressure-bearing area, to perform simulation analysis on the target vehicle and obtain the first simulation analysis result.

[0022] Based on the above technical means, the embodiments of this application can build a whole vehicle simulation model by matching the corresponding material properties of the bumper, accurately simulating the bolt connection with beam units, and applying lateral pressure according to the standard working conditions to complete the simulation, providing realistic and reliable simulation data support for the subsequent determination of the second target stress range.

[0023] Optionally, in one embodiment of this application, the determining module includes: an acquisition unit, configured to apply lateral pressure of the target angle to the bumper body of another vehicle based on the vehicle simulation analysis model, so as to perform simulation analysis on the other vehicle and obtain a second simulation analysis result of the other vehicle; and a second determining unit, configured to determine the second target force range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis result and the second simulation analysis result of the other vehicle.

[0024] Based on the above technical means, the embodiments of this application can determine the second target stress range by integrating the side pressure simulation analysis results of the target vehicle and other vehicles, expanding the sample size, making the range more universal and reliable, and providing a solid and comprehensive benchmark for subsequent stress range comparison.

[0025] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the simplified analysis method for simulating lateral pressure of a car bumper as described in the above embodiments.

[0026] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described simplified analysis method for simulating lateral pressure on a car bumper.

[0027] A fifth aspect of this application provides a computer program product, including a computer program that, when executed, is used to implement the simplified analysis method for simulating lateral pressure on an automobile bumper as described above.

[0028] This application embodiment can, when the target vehicle is under low-temperature and low-speed testing conditions, extract the target bumper body as the target length, and build a simplified vehicle simulation analysis model based on the bumper body and its material properties. This model determines the first target stress range of the bumper body and at least one lateral connecting bolt, and compares it with the second target stress range obtained from a preset whole-vehicle simulation analysis model. Based on the comparison results, the stress and deformation results of the bumper body and lateral connecting bolts are output, effectively improving the efficiency and simulation accuracy of bumper stress analysis and enhancing the practical guiding value of the analysis results for engineering design. Therefore, it solves the problem that related technologies have significant limitations in the research scenarios and analysis dimensions of bumper stress, reducing the practical guiding value of stress analysis results for engineering design and failing to meet the needs of multi-condition structural design and safety verification of bumpers.

[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0031] Figure 1 This is a flowchart illustrating a simplified analysis method for simulating lateral pressure on an automobile bumper according to an embodiment of this application. Figure 2 This is a schematic diagram of a bumper model cut off at 1 / 2 of the bumper body according to a specific embodiment of this application; Figure 3 This is a schematic diagram of the tooling dimensions for lateral loading according to a specific embodiment of this application; Figure 4 This is a schematic diagram of lateral loading at different angles according to a specific embodiment of this application; Figure 5 A flowchart illustrating a simplified analysis method for simulating lateral pressure on a car bumper according to a specific embodiment of this application; Figure 6 This is a schematic diagram of a simplified analysis device for simulating lateral pressure on an automobile bumper, provided according to an embodiment of this application. Figure 7 This is a structural schematic diagram of a vehicle provided according to an embodiment of this application. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0033] The following describes a simplified simulation analysis method and apparatus for lateral pressure on automotive bumpers according to embodiments of this application, with reference to the accompanying drawings. Addressing the limitations in the research scenarios and analysis dimensions of bumper stress mentioned in the background section, which reduces the practical guiding value of stress analysis results for engineering design and fails to meet the needs of multi-condition structural design and safety verification of bumpers, this application provides a simplified simulation analysis method for lateral pressure on automotive bumpers. In this method, when the target vehicle is under low-temperature, low-speed testing conditions, the target bumper body is selected as the target length. A simplified vehicle simulation analysis model is built based on the bumper body and its material properties. The model determines the first target stress range of the bumper body and at least one lateral connecting bolt. This range is compared with the second target stress range obtained from a preset whole-vehicle simulation analysis model. Based on the comparison results, the stress and deformation results of the bumper body and the lateral connecting bolts are output, effectively improving the efficiency and accuracy of bumper stress analysis and enhancing the practical guiding value of the analysis results for engineering design. This solves the problem that the research scenarios and analysis dimensions of bumper stress in related technologies are obviously limited, which reduces the practical guiding value of stress analysis results for engineering design and fails to meet the needs of multi-condition structural design and safety verification of bumpers.

[0034] Specifically, Figure 1 This is a flowchart illustrating a simplified analysis method for simulating lateral pressure on an automobile bumper, as provided in an embodiment of this application.

[0035] like Figure 1 As shown, the simplified analysis method for simulating the lateral pressure of a car bumper includes the following steps: In step S101, when the target vehicle is in a test condition where the target temperature is lower than the preset temperature and the target vehicle speed is lower than the preset vehicle speed, the target bumper body of the target vehicle is cut into the target length.

[0036] In this embodiment, the preset temperature is the temperature of a frigid environment, which can be set by relevant technical personnel and is not specifically limited here; the preset vehicle speed is the speed when turning in a slippery environment and scraping against other vehicles or obstacles at low speed, which can be less than 4 km / h, which can be set by relevant technical personnel and is not specifically limited here; the target bumper body includes the front and rear bumper bodies of the vehicle; the target length is half the length.

[0037] It is understood that, in the embodiments of this application, when the target vehicle is under test conditions where the target temperature is below a certain temperature and the target vehicle speed is below a certain speed, the target bumper body of the target vehicle can be cut off to the target length. For example, in the simulation test model, the front and rear bumper bodies of the vehicle model can be cut off by half. Thus, by cutting off half the length of the bumper body, the simulation model can be simplified, the analysis efficiency can be improved, and the core stress characteristics can be preserved.

[0038] In step S102, a simplified analysis model for vehicle simulation is established based on the target length of the bumper body and the material properties of the target length of the bumper body.

[0039] It is understood that the embodiments of this application can establish a simplified vehicle simulation analysis model based on the half-length bumper body that has been cut off in the above steps and its corresponding low-temperature material properties. For example, the half-length bumper body is first used as the core simulation object, and it is given material properties that match the low-temperature test, that is, the measured stress-strain performance of PPT resin under the corresponding test conditions (-10℃ / -20℃ / -30℃ / -40℃ / -50℃). This ensures that the material properties fit the actual state under the severe cold environment, thereby avoiding the interference of redundant structures on the stress analysis and reducing the simulation hardware resource occupation and analysis cost.

[0040] In step S103, based on the simplified analysis model of vehicle simulation, the first target stress range of the bumper body and at least one lateral connecting bolt of the target length is determined, and the first target stress range is compared with the second target stress range of the target bumper body and at least one lateral connecting bolt obtained by the target vehicle based on the preset vehicle simulation analysis model, so as to output the stress and deformation results of the target bumper body and at least one lateral connecting bolt according to the comparison results.

[0041] In this embodiment, the first target stress range is the stress condition of the bumper body and the beam unit of the connecting bolts, which are determined by the simplified analysis model of vehicle simulation at half the length; the second target stress range is the stress range of the bumper body and beam unit at different low temperatures, obtained through large-sample simulations of multiple vehicle models, multiple low temperature gradients, and multiple side pressure angles.

[0042] It is understood that the embodiments of this application can determine the first target stress range of the bumper body of the target length and at least one lateral connecting bolt based on a simplified analysis model of vehicle simulation, for example, as... Figure 2As shown, in this embodiment, half of the model element of the bumper body can be cut off, and the corresponding low-temperature material properties can be defined. Here, the bolts connecting the bumper to the wheel arch and fender are replaced by rigid constraint bolt holes, and rigid elements are connected with beam elements. Other mounting points of the bumper to the body are also constrained by rigid elements. Then, the other side of the beam element and the other mounting points of the bumper to the body are constrained. Next, lateral loading is applied to the simplified vehicle simulation analysis model, such as... Figure 3 As shown, the loading fixture measures 50mm x 50mm, and the loading position is located at the center line of the bumper side. Figure 4 As shown, the loading angles are 30°, 45°, and 60°. Based on the calculation results, the stress conditions of the bumper body and the connecting bolt beam unit are determined. The stress conditions of the half-length bumper body and the connecting bolt beam unit are compared with the stress range of the bumper body and beam unit at different low temperatures. For example, it can be determined whether the maximum stress / deformation of the body exceeds the limit, whether the core stress of the bolt is within the safe upper limit, whether the stress trends of the two are consistent, and whether the numerical deviation is ≤10% within the engineering allowable range. Finally, based on the comparison results, the following output is provided: If the above judgment meets the engineering design and safety verification requirements, the specific stress values ​​and deformation distribution of the bumper body and the lateral connecting bolts are output; if the engineering design and safety verification requirements are not met, the bumper body structure is optimized until the optimized bumper body meets the requirements.

[0043] Therefore, based on the material properties of PPT resin in the bumper under different low-temperature environments, this application conducts simulation analysis on the bumper body. The material properties of PPT resin change under low-temperature environments, making it more prone to brittle fracture. Thus, through this analysis method, the stress and deformation of the bumper body under low-temperature environments can be effectively obtained, providing a basis for the structural design and verification of the bumper body. In other words, the embodiments of this application not only accurately verify the effectiveness of the simplified simulation model, but also quickly obtain the core stress and deformation data of the bumper body and the lateral connecting bolts, providing a reliable basis for structural design optimization and safety verification, while significantly improving simulation efficiency and reducing R&D costs.

[0044] Optionally, in one embodiment of this application, before comparing the first target stress range with the second target stress range of the target bumper body and at least one lateral connecting bolt obtained based on a preset vehicle simulation analysis model, the method further includes: acquiring the lateral pressure of the target vehicle under static friction conditions and the material properties of the target bumper body when the target vehicle is under test conditions; establishing a vehicle simulation analysis model based on the lateral pressure and the material properties of the target bumper body; performing lateral pressure simulation analysis on the target vehicle using the vehicle simulation analysis model to obtain a first simulation analysis result; and determining the second target stress range of the target bumper body and at least one lateral connecting bolt based on the first simulation analysis result.

[0045] In actual implementation, this application embodiment can calculate that when a car turns in a wet and slippery environment and scrapes against other vehicles or obstacles at low speeds (<4km / h), the friction coefficient between the tire and the ground is approximately static, and the coefficient of friction is 0.3. Therefore, the lateral pressure is calculated as: lateral pressure = force on a single tire × 0.3, where force on a single tire = vehicle mass ÷ 4 × g. Secondly, the low-temperature tensile properties (i.e., stress-strain properties) of PPT resin, the material of the car bumper body, are summarized under different extreme cold temperatures. Next, a complete vehicle simulation analysis model is established, where the bumper body material is defined according to different extreme cold temperatures. The bolts connecting the bumper to the wheel arches and fenders are replaced with beam elements to measure the stress on these bolts under rear lateral pressure conditions, used for subsequent data summarization and to determine whether there is a risk of detachment under low-temperature lateral pressure conditions. Finally, using the vehicle simulation analysis model, a lateral pressure simulation analysis is performed on the target vehicle to obtain the first simulation analysis result in the following steps. Based on the first simulation analysis result, the second target stress range of the target bumper body and at least one lateral connecting bolt is determined. Therefore, this embodiment of the application first obtains the lateral pressure and bumper material properties under test conditions, establishes a whole vehicle simulation model, and determines the second target stress range through simulation analysis, providing a reliable benchmark for the subsequent comparison of the two major stress ranges, and ensuring the accuracy of the final output results and their engineering reference value.

[0046] Optionally, in one embodiment of this application, determining the first target stress range of the bumper body of the target length and at least one lateral connecting bolt based on a simplified vehicle simulation analysis model includes: setting the material properties corresponding to the bumper body of the target length, and simulating the bolts connecting the bumper body of the target length to the wheel arches and fenders of the target vehicle using at least one beam element to establish a simplified vehicle simulation analysis model; applying lateral pressure at a target angle to the bumper body of the target length based on the simplified vehicle simulation analysis model, wherein the pressure-bearing area of ​​the bumper body of the target length is a preset pressure-bearing area, to perform a simplified simulation analysis of the target vehicle; and determining the first target stress range of the bumper body of the target length and at least one lateral connecting bolt based on the simplified simulation analysis results.

[0047] As one possible approach, this embodiment can be based on a simplified vehicle simulation analysis model with a bumper body of half its length as the core, assigning it the material properties of low-temperature measured PPT resin, simulating lateral connecting bolts using beam elements, and setting constraints that conform to actual installation boundaries. First, lateral pressures (with a pressure area of ​​50mm × 50mm) at target angles of 30°, 45°, and 60° are applied to the model. After simulation calculations, the maximum stress, maximum deformation, and stress distribution characteristics of the bumper body of half its length are extracted. Simultaneously, core stress data such as shear force, bending stress, and axial force corresponding to at least one lateral connecting bolt are obtained from the beam element. These are integrated to form a first target stress range (including the stress range and fluctuation range under various working conditions). Thus, this embodiment, by setting realistic material properties, accurately simulating bolt connections using beam elements, and conducting simplified simulation analysis based on the target angle and preset pressure area, efficiently determines a reliable first target stress range, providing accurate and working-condition-appropriate core data support for subsequent comparative verification.

[0048] Optionally, in one embodiment of this application, before determining the second target stress range of the target bumper body and at least one lateral connecting bolt based on the first simulation analysis result, the method further includes: setting the material properties corresponding to the target bumper body, and simulating the bolts connecting the target bumper body to the wheel arches and fenders of the target vehicle using at least one beam element to establish a vehicle simulation analysis model; based on the vehicle simulation analysis model, applying lateral pressure of a target angle to the target bumper body, wherein the pressure-bearing area of ​​the target bumper body is a preset pressure-bearing area, to perform simulation analysis on the target vehicle and obtain the first simulation analysis result.

[0049] In some embodiments, the bumper body material can be defined according to different extreme cold temperatures. The bolts connecting the bumper to the wheel arches and fenders can be replaced with beam units to measure the stress on the bolts under rear side pressure conditions. This data is used for subsequent data summarization and to determine whether there is a risk of detachment under low-temperature side pressure conditions. Finally, using a vehicle simulation analysis model, a lateral pressure simulation analysis is performed on the target vehicle, i.e., side pressure loading is applied. The loading fixture size is 50mm×50mm, the loading position is located at the center line of the bumper side, and the loading angles are 30°, 45°, and 60°, respectively, to obtain the stress range of the bumper body and beam units of the target vehicle. By setting the corresponding material properties of the target bumper and using beam units to accurately simulate the bolt connections to establish a whole vehicle simulation model, simulation is carried out according to the target angle and the preset pressure area, providing accurate and reliable first simulation analysis results to support the subsequent determination of the second target stress range.

[0050] Optionally, in one embodiment of this application, determining the second target stress range of the target bumper body and at least one lateral connecting bolt based on the first simulation analysis result includes: applying lateral pressure of a target angle to the bumper body of other vehicles based on a vehicle simulation analysis model to perform simulation analysis on other vehicles and obtain the second simulation analysis result of other vehicles; and determining the second target stress range of the target bumper body and at least one lateral connecting bolt based on the first simulation analysis result and the second simulation analysis result of other vehicles.

[0051] In some embodiments, this application can also apply lateral pressure of a target angle to the bumper body of other vehicles based on a vehicle simulation analysis model. By expanding the calculation sample size through different vehicles, the stress on the bumper body under lateral pressure and the stress on the bolts connected to the side are obtained under different low temperature conditions. The above calculations are then summarized to obtain the stress range of the bumper body and beam unit at different low temperature temperatures. By integrating the simulation analysis results of the target vehicle and other vehicles, the sample size is expanded to determine the second target stress range, making it more universal and reliable, and providing a solid benchmark for subsequent comparative verification.

[0052] For example, the working principle of the embodiments of this application will be described in detail below with a specific example.

[0053] Step S501: Test the material properties of the bumper material at low temperatures.

[0054] Step S502: Lateral pressure, where, lateral pressure = total vehicle mass ÷ 4 × g × 0.3.

[0055] Step S503: Full vehicle simulation analysis model, define the low temperature material properties of the front and rear bumpers, and use beam elements to connect the front and rear bumpers to the wheel arches and fenders.

[0056] Step S504: Lateral pressure, at a 30-degree angle, with a force-bearing area of ​​50 x 50.

[0057] Step S505: Lateral pressure, at a 45-degree angle, with a force-bearing area of ​​50 x 50.

[0058] Step S506: Lateral pressure, at a 60-degree angle, with a force-bearing area of ​​50 x 50.

[0059] Step S507: Expand the sample and repeat the calculations in the above steps.

[0060] Step S508: Summarize the stress range of the bumper and beam.

[0061] Step S509: Take 1 / 2 of the bumper body and define the low-temperature material properties.

[0062] Step S510: Constraints: The wheel arch and fender connection points are connected with beams, and the other end of the beams is constrained as well as other connection points of the bumper body.

[0063] Step S511: Loading: Lateral pressure, applied at 30 degrees, 45 degrees and 60 degrees respectively.

[0064] Step S512: Determine whether the bumper body and bolts meet the requirements. If the bumper body and bolts meet the requirements, output the stress and deformation of the bumper body in a low-temperature environment; otherwise, proceed to step S513.

[0065] Step S513: Sample optimization, i.e., optimizing the bumper body structure.

[0066] The simplified analysis method for lateral pressure simulation of automotive bumpers proposed in this application allows for the selection of a target bumper body as the target length when the target vehicle is under low-temperature and low-speed testing conditions. A simplified vehicle simulation analysis model is then built based on the bumper body and its material properties. This model determines the first target stress range of the bumper body and at least one lateral connecting bolt. This first target stress range is compared with the second target stress range obtained from a pre-set whole-vehicle simulation analysis model. Based on the comparison results, the stress and deformation results of the bumper body and the lateral connecting bolts are output, effectively improving the efficiency and accuracy of bumper stress analysis and enhancing the practical guidance value of the analysis results for engineering design. This solves the problem that related technologies have significant limitations in the research scenarios and analysis dimensions of bumper stress, reducing the practical guidance value of stress analysis results for engineering design and failing to meet the needs of multi-condition structural design and safety verification of bumpers.

[0067] Next, referring to the accompanying drawings, a simplified analysis device for simulating the lateral pressure of an automobile bumper according to an embodiment of this application is described.

[0068] Figure 6 This is a block diagram of a simplified analysis device for simulating the lateral pressure of an automobile bumper according to an embodiment of this application.

[0069] like Figure 6 As shown, the simplified analysis device 10 for simulating the lateral pressure of a car bumper includes: a processing module 100, a setup module 200, and an analysis module 300.

[0070] Specifically, the processing module 100 is used to cut the target bumper body of the target vehicle into the target length when the target vehicle is in a test condition where the target temperature is lower than the preset temperature and the target vehicle speed is lower than the preset vehicle speed.

[0071] Module 200 is established to create a simplified analysis model for vehicle simulation based on the target length of the bumper body and its material properties.

[0072] The analysis module 300 is used to determine the first target stress range of the bumper body and at least one lateral connecting bolt of the target length based on the simplified analysis model of vehicle simulation, and compare the first target stress range with the second target stress range of the bumper body and at least one lateral connecting bolt obtained by the target vehicle based on the preset vehicle simulation analysis model, so as to output the stress and deformation results of the target bumper body and at least one lateral connecting bolt according to the comparison results.

[0073] Optionally, in one embodiment of this application, the apparatus 10 of this application embodiment further includes: a first acquisition module, a first establishment module, a second acquisition module, and a determination module.

[0074] The first acquisition module is used to acquire the lateral pressure of the target vehicle under static friction and the material properties of the target bumper body of the target vehicle when the target vehicle is in the test condition, before comparing the first target stress range with the second target stress range of the target vehicle obtained based on the preset vehicle simulation analysis model.

[0075] The first module is used to establish a vehicle simulation analysis model based on lateral pressure and the material properties of the target bumper body before comparing the first target stress range with the second target stress range of the target bumper body and at least one lateral connecting bolt obtained from the preset vehicle simulation analysis model.

[0076] The second acquisition module is used to perform lateral pressure simulation analysis on the target vehicle using the vehicle simulation analysis model before comparing the first target stress range with the second target stress range of the target bumper body and at least one lateral connecting bolt obtained based on the preset vehicle simulation analysis model, and obtain the first simulation analysis result.

[0077] The determination module is used to determine the second target stress range of the target bumper body and at least one lateral connecting bolt based on the first simulation analysis results before comparing the first target stress range with the second target stress range of the target bumper body and at least one lateral connecting bolt obtained by the target vehicle based on a preset vehicle simulation analysis model.

[0078] Optionally, in one embodiment of this application, the analysis module 300 includes: a setting unit, a processing unit, and a first determining unit.

[0079] The setting unit is used to set the material properties corresponding to the bumper body of the target length, and to simulate the bolts connecting the bumper body of the target length to the wheel arches and fenders of the target vehicle through at least one beam element to establish a simplified analysis model for vehicle simulation.

[0080] The processing unit is used to apply lateral pressure at a target angle to the bumper body of the target length based on a simplified vehicle simulation analysis model. The pressure area of ​​the bumper body of the target length is a preset pressure area, so as to perform a simplified simulation analysis of the target vehicle.

[0081] The first determining unit is used to determine the first target stress range of the bumper body of the target length and at least one lateral connecting bolt based on the simplified analysis results of the simulation.

[0082] Optionally, in one embodiment of this application, the apparatus 10 of this application embodiment further includes: a second establishing module and a third acquiring module.

[0083] The second establishment module is used to set the material properties corresponding to the target bumper body before determining the second target stress range of the target bumper body and at least one lateral connecting bolt based on the first simulation analysis results, and to simulate the bolts connecting the target bumper body to the wheel arch and fender of the target vehicle through at least one beam element to establish a vehicle simulation analysis model.

[0084] The third acquisition module is used to apply lateral pressure of the target angle to the target bumper body based on the vehicle simulation analysis model before determining the second target stress range of the target bumper body and at least one lateral connecting bolt based on the first simulation analysis result. The pressure area of ​​the target bumper body is a preset pressure area, so as to perform simulation analysis on the target vehicle and obtain the first simulation analysis result.

[0085] Optionally, in one embodiment of this application, the determining module includes: an acquisition unit and a second determining unit.

[0086] The acquisition unit is used to apply lateral pressure at a target angle to the bumper body of other vehicles based on the vehicle simulation analysis model, so as to perform simulation analysis on other vehicles and obtain the second simulation analysis results of other vehicles.

[0087] The second determining unit is used to determine the second target stress range of the target bumper body and at least one lateral connecting bolt based on the first simulation analysis results and the second simulation analysis results of other vehicles.

[0088] It should be noted that the foregoing explanation of the simplified analysis method for lateral pressure simulation of automobile bumpers also applies to the simplified analysis device for lateral pressure simulation of automobile bumpers in this embodiment, and will not be repeated here.

[0089] The simplified simulation analysis device for lateral pressure of automotive bumpers proposed in this application can, when the target vehicle is under low-temperature and low-speed testing conditions, extract the target bumper body as the target length and build a simplified vehicle simulation analysis model based on the bumper body and its material properties. This model determines the first target stress range of the bumper body and at least one lateral connecting bolt, and compares it with the second target stress range obtained from a preset whole-vehicle simulation analysis model. Based on the comparison results, the stress and deformation results of the bumper body and the lateral connecting bolts are output, effectively improving the efficiency and accuracy of bumper stress analysis and enhancing the practical guiding value of the analysis results for engineering design. This solves the problem that related technologies have significant limitations in the research scenarios and analysis dimensions of bumper stress, reducing the practical guiding value of stress analysis results for engineering design and failing to meet the needs of multi-condition structural design and safety verification of bumpers.

[0090] Figure 7 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include: The memory 701, the processor 702, and the computer program stored on the memory 701 and executable on the processor 702.

[0091] When the processor 702 executes the program, it implements the simplified analysis method for simulating the lateral pressure of the car bumper provided in the above embodiments.

[0092] Furthermore, the vehicle also includes: Communication interface 703 is used for communication between memory 701 and processor 702.

[0093] The memory 701 is used to store computer programs that can run on the processor 702.

[0094] The memory 701 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0095] If the memory 701, processor 702, and communication interface 703 are implemented independently, then the communication interface 703, memory 701, and processor 702 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized into address buses, data buses, control buses, etc. For ease of representation, Figure 7 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0096] Optionally, in a specific implementation, if the memory 701, processor 702, and communication interface 703 are integrated on a single chip, then the memory 701, processor 702, and communication interface 703 can communicate with each other through an internal interface.

[0097] The processor 702 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0098] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described simplified analysis method for simulating the lateral pressure of a car bumper.

[0099] This embodiment also provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned simplified analysis method for simulating the lateral pressure of a car bumper.

[0100] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0101] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0102] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0103] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0104] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0105] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0106] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0107] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A simplified analysis method for simulating lateral pressure on a car bumper, characterized in that, Includes the following steps: When the target vehicle is under test conditions where the target temperature is lower than the preset temperature and the target vehicle speed is lower than the preset vehicle speed, the target bumper body of the target vehicle is cut off as the target length. Based on the target length of the bumper body and the material properties of the target length of the bumper body, a simplified analysis model for vehicle simulation is established. Based on the simplified vehicle simulation analysis model, a first target stress range for the target length bumper body and at least one lateral connecting bolt is determined. The first target stress range is then compared with a second target stress range for the target bumper body and at least one lateral connecting bolt obtained from a preset vehicle simulation analysis model. Based on the comparison results, the stress and deformation results of the target bumper body and at least one lateral connecting bolt are output.

2. The method according to claim 1, characterized in that, Before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained based on a preset vehicle simulation analysis model, the process further includes: When the target vehicle is under the test conditions, the lateral pressure of the target vehicle under static friction and the material properties of the target bumper body of the target vehicle are obtained. A vehicle simulation analysis model is established based on the lateral pressure and the material properties of the target bumper body. Using the vehicle simulation analysis model, a lateral pressure simulation analysis is performed on the target vehicle to obtain the first simulation analysis result; Based on the first simulation analysis results, the second target stress range of the target bumper body and the at least one lateral connecting bolt is determined.

3. The method according to claim 1, characterized in that, The determination of the first target stress range for the bumper body of the target length and at least one lateral connecting bolt based on the simplified analysis model of the vehicle simulation includes: Set the material properties corresponding to the bumper body of the target length, and simulate the bolts connecting the bumper body of the target length to the wheel arches and fenders of the target vehicle through at least one beam element to establish a simplified analysis model for vehicle simulation. Based on the vehicle simulation simplified analysis model, a lateral pressure of a target angle is applied to the bumper body of the target length, wherein the pressure-bearing area of ​​the bumper body of the target length is a preset pressure-bearing area, so as to perform a simplified simulation analysis of the target vehicle. Based on the simplified analysis results of the simulation, the first target stress range of the bumper body and at least one lateral connecting bolt of the target length is determined.

4. The method according to claim 2, characterized in that, Before determining the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis results, the method further includes: Set the material properties corresponding to the target bumper body, and simulate the bolts connecting the target bumper body to the wheel arches and fenders of the target vehicle through at least one beam element to establish the vehicle simulation analysis model; Based on the vehicle simulation analysis model, a lateral pressure of a target angle is applied to the target bumper body, wherein the pressure-bearing area of ​​the target bumper body is a preset pressure-bearing area, so as to perform simulation analysis on the target vehicle and obtain the first simulation analysis result.

5. The method according to claim 4, characterized in that, The step of determining the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis results includes: Based on the vehicle simulation analysis model, lateral pressure at the target angle is applied to the bumper body of other vehicles to perform simulation analysis on the other vehicles and obtain the second simulation analysis results of the other vehicles. Based on the first simulation analysis results and the second simulation analysis results of the other vehicles, the second target stress range of the target bumper body and the at least one lateral connecting bolt is determined.

6. A simplified analysis device for simulating lateral pressure on a car bumper, characterized in that, include: The processing module is used to cut the target bumper body of the target vehicle into the target length when the target vehicle is in a test condition where the target temperature is lower than the preset temperature and the target vehicle speed is lower than the preset vehicle speed. A module is established to create a simplified analysis model for vehicle simulation based on the target length of the bumper body and the material properties of the bumper body. The analysis module is used to determine the first target stress range of the bumper body and at least one lateral connecting bolt of the target length based on the simplified analysis model of the vehicle simulation, and compare the first target stress range with the second target stress range of the target bumper body and at least one lateral connecting bolt obtained by the target vehicle based on the preset vehicle simulation analysis model, so as to output the stress and deformation results of the target bumper body and at least one lateral connecting bolt according to the comparison results.

7. The apparatus according to claim 6, characterized in that, Also includes: The first acquisition module is used to acquire the lateral pressure of the target vehicle under static friction and the material properties of the target bumper body of the target vehicle when the target vehicle is in the test condition, before comparing the first target stress range with the second target stress range of the target vehicle obtained based on the preset vehicle simulation analysis model and the target bumper body of the target vehicle. The first establishment module is used to establish a vehicle simulation analysis model based on the lateral pressure and the material properties of the target bumper body before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained by the target vehicle based on the preset vehicle simulation analysis model. The second acquisition module is used to perform lateral pressure simulation analysis on the target vehicle using the vehicle simulation analysis model before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained by the target vehicle based on the preset vehicle simulation analysis model, and obtain the first simulation analysis result. The determination module is used to determine the second target stress range of the target bumper body and the at least one lateral connecting bolt based on the first simulation analysis results before comparing the first target stress range with the second target stress range of the target bumper body and the at least one lateral connecting bolt obtained by the target vehicle based on a preset vehicle simulation analysis model.

8. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and capable of running on the processor, the processor executing the program to implement the simplified analysis method for simulating lateral pressure of an automobile bumper as described in any one of claims 1-5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the simplified analysis method for simulating the lateral pressure of an automobile bumper as described in any one of claims 1-5.

10. A computer program product, comprising a computer program, characterized in that, The computer program is executed by a processor to implement the simplified analysis method for simulating lateral pressure on an automobile bumper as described in any one of claims 1-5.

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