Establishment method, device and equipment of side collision simplified model

Abstract

The method provided by the embodiment of the application comprises the following steps: obtaining a side collision simplified model by intercepting a side collision whole vehicle model; selecting a boundary node from the intercepting position of the side collision simplified model; determining a mark position corresponding to the boundary node in the side collision whole vehicle model; determining collision displacement data of the mark position in a side collision working condition; generating a collision displacement file according to the collision displacement data; applying the collision displacement file in the side collision simplified model to obtain collision displacement data of the boundary node; determining whether the side collision simplified model meets the accuracy requirement according to the correlation coefficient of the collision displacement data of the side collision whole vehicle model and the collision displacement data of the side collision simplified model; and re-intercepting the side collision simplified model if the side collision simplified model does not meet the accuracy requirement. The method provided by the application can more reasonably construct the side collision simplified model.

Description

Technical Field

[0001] This application relates to the field of automotive crashworthiness design, specifically to a method, apparatus, and equipment for establishing a simplified side-impact model. Background Technology

[0002] Vehicle crashworthiness is a major research area in the field of automotive passive safety. When a car is subjected to a side impact, the probability and severity of passenger injury are relatively high. Therefore, to ensure passenger safety to the greatest extent possible, vehicle crashworthiness simulation experiments are essential. Currently, conducting vehicle crashworthiness simulation experiments requires all the data from a full-vehicle model, which leads to longer simulation times. Therefore, it is possible to consider using a simplified model to replace the full-vehicle model. However, how to construct a more reasonable simplified model to replace the full-vehicle model is a problem that needs to be solved. Summary of the Invention

[0003] In view of this, this application provides a method, apparatus and equipment for establishing a simplified side-impact model, so as to construct a simplified side-impact model.

[0004] In a first aspect, embodiments of this application provide a method for establishing a simplified side-impact model, comprising: determining a cut-off position in a full-vehicle side-impact model to obtain a simplified side-impact model from the full-vehicle side-impact model based on the cut-off position; selecting boundary nodes from the cut-off position of the simplified side-impact model; determining a marker position corresponding to the boundary node in the full-vehicle side-impact model; determining collision displacement data of the marker position of the full-vehicle side-impact model under a side-impact condition; generating a collision displacement file based on the collision displacement data; applying the collision displacement file to the simplified side-impact model to reproduce the collision condition in the simplified side-impact model, thereby obtaining collision displacement data of the boundary node of the simplified side-impact model; determining a correlation coefficient between the collision displacement data of the full-vehicle side-impact model and the collision displacement data of the simplified side-impact model; determining whether the simplified side-impact model meets accuracy requirements based on the correlation coefficient; and if the simplified side-impact model does not meet accuracy requirements, re-determining the cut-off position in the full-vehicle side-impact model to re-cut the simplified side-impact model based on the re-determined cut-off position.

[0005] In one possible implementation, the intercepted location includes the central tunnel position of the side-impact vehicle model, the central tunnel position extending from the front to the rear of the side-impact vehicle model, and the side-impact vehicle model being symmetrical about the central tunnel position.

[0006] In one possible implementation, after extracting a simplified side-impact model from the full-vehicle side-impact model based on the extraction position, the remaining part of the full-vehicle side-impact model is the non-impact side model; before applying the collision displacement file to the simplified side-impact model to reproduce the collision condition and obtain the collision displacement data of the boundary nodes of the simplified side-impact model, the method further includes: determining a first centroid position of the full-vehicle side-impact model; determining a second centroid position of the simplified side-impact model, wherein the second centroid position is used to assign mass to the simplified side-impact model to obtain a first mass point; determining a third centroid position in the simplified side-impact model for simulating the non-impact side model based on the first centroid position and the second centroid position, wherein the third centroid position is used to assign mass to the non-impact side model to obtain a second mass point; and fusing the first mass point and the second mass point to make the simplified side-impact model have the same mass as the full-vehicle side-impact model.

[0007] In one possible implementation, determining a third centroid position for simulating the non-collision side model in the simplified side collision model based on the first centroid position and the second centroid position includes: mapping the first centroid position of the side collision vehicle model to the coordinate system of the simplified side collision model; determining first distance data between the first centroid position and the second centroid position based on the coordinates of the first centroid position and the second centroid position; and determining the coordinates of the third centroid position of the non-collision side model based on the mass of the simplified side collision model, the first distance data, and the mass of the non-collision side model.

[0008] In one possible implementation, the collision displacement file includes velocity parameters, which are the velocity parameters of a side impact barrier; generating the collision displacement file based on the collision displacement data includes: generating the collision displacement file from the collision displacement parameters using the keyword *INTERFACE_COMPONENT_NODE set in the simulation algorithm.

[0009] In one possible implementation, it is determined whether the mass increase parameter and hourglass energy of the side-impact vehicle model before and after the side-impact condition meet their respective thresholds; if not, it is determined that the side-impact vehicle model does not meet the accuracy requirements.

[0010] In one possible implementation, it is determined whether the mass increase parameter and hourglass energy of the simplified side collision model before and after the side collision condition meet their respective thresholds; if not, it is determined that the simplified side collision model does not meet the accuracy requirements.

[0011] In one possible implementation, determining the correlation coefficient between the collision displacement data of the full-scale side-impact vehicle model and the collision displacement data of the simplified side-impact model includes: generating a velocity curve at the B-pillar waistline position of the full-scale side-impact vehicle model based on the collision displacement data of the full-scale side-impact vehicle model; generating a velocity curve at the B-pillar waistline position of the simplified side-impact model based on the collision displacement data of the simplified side-impact model; and performing correlation fitting between the velocity curves at the B-pillar waistline position of the full-scale side-impact vehicle model and the velocity curves at the B-pillar waistline position of the simplified side-impact model to obtain the correlation coefficient.

[0012] In one possible implementation, the B-pillar waistline of the side-impact vehicle model is located on the pillar connecting the front and rear doors of the side-impact vehicle model, and the B-pillar waistline of the simplified side-impact model is located on the pillar connecting the front and rear doors of the simplified side-impact model. The horizontal axis of the velocity curve is time, and the vertical axis is velocity. The velocity curve is used to represent the velocity change of the relevant B-pillar waistline position under the side-impact condition.

[0013] In one possible implementation, if the simplified side-impact model meets the accuracy requirements, then the key structural components of the simplified side-impact model are determined. These key structural components include the B-pillar, front seat crossbeam, sill, and door anti-collision beam of the simplified side-impact model. Based on the collision deformation of the key structural components, the parameters to be optimized for the key structural components are determined. These parameters include the cross-sectional shape, thickness, and material grade of the key structural components. The key structural components of the simplified side-impact model are then optimized based on these parameters.

[0014] In one possible implementation, the B-pillar is a pillar connecting the front and rear doors of the simplified side-impact model; the front seat crossbeam is a crossbeam connecting the central passage of the simplified side-impact model and the sill beam; the sill is located directly below the door of the simplified side-impact model; and the door anti-collision beam is a crossbeam added to the internal structure of the door.

[0015] Secondly, embodiments of this application provide an apparatus for establishing a simplified side-impact model, comprising: a cutting module, configured to determine a cutting position in a side-impact vehicle model, so as to cut out a simplified side-impact model from the side-impact vehicle model according to the cutting position; a selection module, configured to select boundary nodes from the cutting position of the simplified side-impact model; a marking module, configured to determine marking positions corresponding to the boundary nodes in the side-impact vehicle model; a collision simulation module, configured to determine collision displacement data of the marking positions of the side-impact vehicle model under a side-impact condition; generate a collision displacement file based on the collision displacement data; and simulate the collision displacement data. The collision displacement file is applied to the simplified side collision model to reproduce the collision condition in the simplified side collision model, and the collision displacement data of the boundary nodes of the simplified side collision model is obtained; the processing module is used to determine the correlation coefficient between the collision displacement data of the full-vehicle side collision model and the collision displacement data of the simplified side collision model; based on the correlation coefficient, it is determined whether the simplified side collision model meets the accuracy requirements; and if the simplified side collision model does not meet the accuracy requirements, it is used to re-determine the interception position in the full-vehicle side collision model through the interception module, so as to re-intercept the simplified side collision model according to the re-determined interception position.

[0016] Thirdly, embodiments of this application provide an electronic device, including a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute the method described in any of the first aspects above.

[0017] Fourthly, embodiments of this application provide a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the method described in any of the first aspects.

[0018] The solution provided in this application involves obtaining a simplified side-collision model from a full-vehicle side-collision model, applying the collision displacement file obtained from the full-vehicle side-collision model to the simplified side-collision model to reproduce the side-collision condition, obtaining the collision displacement data of the boundary nodes of the simplified side-collision model, and constructing a simplified side-collision model that can replace the full-vehicle side-collision model based on the correlation coefficient between the collision displacement data of the full-vehicle side-collision model and the collision displacement data of the simplified side-collision model. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A flowchart illustrating a method for establishing a simplified side collision model provided in this application embodiment;

[0021] Figure 2 A schematic diagram of a side-impact vehicle model provided in an embodiment of this application;

[0022] Figure 3 A schematic diagram of a simplified side collision model provided in an embodiment of this application;

[0023] Figure 4 A schematic diagram showing the correlation fitting between the velocity curve at the B-pillar waistline position of a side-impact vehicle model and the velocity curve at the B-pillar waistline position of a simplified side-impact model, provided for an embodiment of this application.

[0024] Figure 5 An energy change curve of a simplified side-impact collision model provided in this application embodiment;

[0025] Figure 6 A flowchart illustrating another simplified side collision model creation method provided in this application embodiment;

[0026] Figure 7 A schematic diagram of a device for creating a simplified side collision model provided in an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0028] Specific implementation measures

[0029] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0030] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0031] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0033] Currently, when conducting car crashworthiness simulation experiments, all the data of the full-vehicle model in side impact is required, which will lead to a longer simulation experiment time. Therefore, it is possible to consider using a simplified side impact model to replace the full-vehicle model in side impact. However, how to construct a simplified side impact model that can replace the full-vehicle model in side impact more reasonably is a problem that needs to be solved.

[0034] To address the aforementioned problems, this application provides the following solution: A cutoff position is determined in the full-vehicle side-impact model to obtain a simplified side-impact model from the full-vehicle side-impact model based on the cutoff position; boundary nodes are selected from the cutoff position of the simplified side-impact model; marker positions corresponding to the boundary nodes are determined in the full-vehicle side-impact model; collision displacement data of the marker positions in the full-vehicle side-impact model are determined under a side-impact condition; a collision displacement file is generated based on the collision displacement data; the collision displacement file is applied to the simplified side-impact model to reproduce the collision condition in the simplified side-impact model, obtaining the collision displacement data of the boundary nodes of the simplified side-impact model; a correlation coefficient is determined between the collision displacement data of the full-vehicle side-impact model and the collision displacement data of the simplified side-impact model; based on the correlation coefficient, it is determined whether the simplified side-impact model meets the accuracy requirements; if the simplified side-impact model does not meet the accuracy requirements, a new cutoff position is determined in the full-vehicle side-impact model to re-cut the simplified side-impact model based on the newly determined cutoff position.

[0035] Guided by this approach, the following feasible implementation schemes are provided in this embodiment.

[0036] This application provides a method for establishing a simplified side collision model.

[0037] Specifically, such as Figure 1 The diagram shown is a flowchart of a method for establishing a simplified side collision model according to an embodiment of this application. Figure 1As shown, the method includes:

[0038] Step S101: Determine the cut-off position in the full-vehicle model of the side collision, so as to extract the simplified side collision model from the full-vehicle model of the side collision according to the cut-off position. After extracting the simplified side collision model from the full-vehicle model of the side collision according to the cut-off position, the remaining part of the full-vehicle model of the side collision is the non-collision side model.

[0039] The cut-off location includes the central tunnel of the side-impact vehicle model, which runs from the front to the rear of the model. The side-impact vehicle model is symmetrical about the central tunnel.

[0040] like Figure 2 The image shown is a schematic diagram of a side-impact vehicle model provided in an embodiment of this application. Figure 2 As shown, the position of the central tunnel can be determined in the side collision vehicle model. Based on the position of the central tunnel, the simplified side collision model and the non-collision side model can be extracted. The side collision barrier is used to perform side collision on the side collision vehicle model.

[0041] like Figure 3 The image shown is a schematic diagram of a simplified side collision model provided in an embodiment of this application. Figure 3 As shown, the simplified side collision model is based on Figure 2 The central tunnel position shown was extracted from the side-impact vehicle model.

[0042] Step S102: Select boundary nodes from the cut-off position of the simplified side collision model. One possible implementation is as follows: Figure 3 The cutoff point of the simplified side collision model shown is selected from the boundary nodes.

[0043] Step S103: Determine the marker positions corresponding to the boundary nodes in the side collision vehicle model.

[0044] To determine the marker positions corresponding to boundary nodes in a side-impact vehicle model, one possible implementation is to... Figure 2 In the side-impact vehicle model shown, determine the position corresponding to the boundary node of the simplified side-impact model at the cut-off location, and mark the position.

[0045] Step S104: Determine the collision displacement data of the marked positions of the vehicle model in the side collision under the side collision condition.

[0046] Step S105: Generate a collision displacement file based on the collision displacement data. The collision displacement file contains velocity parameters, which are the velocity parameters of the side impact barrier.

[0047] One possible implementation for generating a collision displacement file from collision displacement data involves setting the speed parameters of the side impact barrier; controlling the side impact barrier to perform a side collision on the vehicle model according to the speed parameters; determining the collision displacement data of the marked positions on the vehicle model under side collision conditions; and generating a collision displacement file based on the collision displacement data. Specifically, generating the collision displacement file from the collision displacement data can be achieved using the keyword *INTERFACE_COMPONENT_NODE set in the simulation algorithm.

[0048] Step S106: Apply the collision displacement file to the simplified side collision model to reproduce the side collision condition in the simplified side collision model and obtain the collision displacement data of the boundary nodes of the simplified side collision model.

[0049] One possible implementation is to use the keywords *INTERFACE_LINKING_EDGE and *INTERFACE_LINKING_FILE in the simulation algorithm. The keyword *INTERFACE_LINKING_EDGE is used to import the collision displacement file into the simplified side collision model, and the keyword *INTERFACE_LINKING_FILE is used to call the collision displacement file in the simplified side collision model to obtain the collision displacement data of the boundary nodes of the simplified side collision model.

[0050] Step S107: Determine the correlation coefficient between the collision displacement data of the full-vehicle side-impact model and the collision displacement data of the simplified side-impact model.

[0051] To determine the correlation coefficient between the collision displacement data of the full-scale side-impact vehicle model and the collision displacement data of the simplified side-impact model, one possible approach is to generate a velocity curve at the B-pillar waistline position of the full-scale side-impact vehicle model based on the collision displacement data of the full-scale side-impact vehicle model; generate a velocity curve at the B-pillar waistline position of the simplified side-impact model based on the collision displacement data of the simplified side-impact model; and perform correlation fitting between the velocity curves at the B-pillar waistline positions of the full-scale side-impact vehicle model and the simplified side-impact model to obtain the correlation coefficient.

[0052] In the side-impact full-vehicle model, the B-pillar waistline is located on the pillar connecting the front and rear doors of the side-impact full-vehicle model. In the side-impact simplified model, the B-pillar waistline is located on the pillar connecting the front and rear doors of the side-impact simplified model. The horizontal axis of the velocity curve represents time, and the vertical axis represents velocity. The velocity curve is used to represent the velocity change of the relevant B-pillar waistline position under the side-impact condition.

[0053] like Figure 4The diagram shown illustrates the correlation fitting between the velocity curve of the B-pillar waistline position of a full-vehicle model in a side-impact collision and the velocity curve of the B-pillar waistline position of a simplified side-impact collision model, as provided in an embodiment of this application. This correlation fitting diagram includes four reference criteria, a correlation coefficient, the velocity curve of the B-pillar waistline position of the full-vehicle model, and the velocity curve of the B-pillar waistline position of the simplified side-impact collision model.

[0054] The four reference criteria are Corridor Rating (the channel of the velocity curve), Phase Rating (the phase of the velocity curve), Magnitude Rating (the amplitude of the velocity curve), and Slope Rating (the slope of the velocity curve). These four criteria are used to compare the velocity curves at the B-pillar waistline position of the full-vehicle side-impact collision model with those of the simplified side-impact collision model to determine the correlation coefficient. One possible implementation is to obtain the four reference criteria and calculate their weighted average, which then becomes the correlation coefficient.

[0055] Step S108: Determine whether the simplified side collision model meets the accuracy requirements based on the correlation coefficient.

[0056] To determine whether the simplified side collision model meets the accuracy requirements, one possible approach is to determine whether the correlation coefficient is greater than or equal to a preset threshold of 0.85. If the correlation coefficient is greater than or equal to the preset threshold of 0.85, the simplified side collision model meets the accuracy requirements, and step S109 is executed; otherwise, the simplified side collision model does not meet the accuracy requirements, and step S110 is executed.

[0057] Specifically, such as Figure 4 In the correlation fitting diagram shown, when the four reference criteria are 0.940835, 0.961604, 0.97942, and 0.579797 respectively, the correlation coefficient can be determined to be 0.880498. The correlation coefficient at this time is greater than the preset threshold of 0.85, indicating that the established simplified side collision model meets the accuracy requirements.

[0058] Step S109: If the simplified side collision model meets the accuracy requirements, then optimize the key structural components of the simplified side collision model.

[0059] To optimize the key structural components of the simplified side-impact model, one possible approach is to identify the key structural components, including the B-pillar, front seat crossbeam, sill, and door anti-collision beam; determine the optimization parameters of the key structural components based on their collision deformation, including their cross-sectional shape, thickness, and material grade; and then optimize the key structural components of the simplified side-impact model based on these optimization parameters.

[0060] Among them, the B-pillar is the pillar connecting the front and rear doors of the simplified side collision model; the front seat crossbeam is the crossbeam connecting the central tunnel and the sill beam of the simplified side collision model; the sill is the position directly below the door of the simplified side collision model; and the door anti-collision beam is a crossbeam added to the internal structure of the door.

[0061] Step S110: If the simplified side collision model does not meet the accuracy requirements, the cut-off position is re-determined in the full vehicle model of the side collision, so as to re-cut the simplified side collision model according to the re-determined cut-off position.

[0062] In this embodiment of the application, the collision displacement file is applied to the simplified side collision model to reproduce the side collision condition in the simplified side collision model, thereby obtaining the collision displacement data of the boundary nodes of the simplified side collision model. Based on the correlation coefficient between the collision displacement data of the full-vehicle side collision model and the collision displacement data of the simplified side collision model, a simplified side collision model that can replace the full-vehicle side collision model is constructed.

[0063] In the process of constructing the simplified side-impact model in the above embodiments, in order to ensure that the constructed simplified side-impact model meets the accuracy requirements, in addition to considering the correlation coefficient between the collision displacement data of the full-vehicle side-impact model and the collision displacement data of the simplified side-impact model to determine whether the simplified side-impact model meets the accuracy requirements, it is also necessary to consider whether the full-vehicle side-impact model and the simplified side-impact model meet their respective accuracy requirements. Among them, the parameters considered may include the mass increase parameter and hourglass energy.

[0064] To determine whether a side-impact vehicle model meets its accuracy requirements, one possible approach is to check whether the mass increase parameter and hourglass energy of the side-impact vehicle model before and after the side-impact condition meet their respective thresholds. If not, the side-impact vehicle model is determined not to meet the accuracy requirements.

[0065] The mass increase parameter is the mass automatically added to the vehicle model during a side-impact collision by the simulation algorithm. If the mass increase parameter of the vehicle model during a side-impact collision is less than a preset first threshold, then the mass increase parameter meets the accuracy requirements. Optionally, the first threshold can be 5% of the mass of the vehicle model before the side-impact collision; otherwise, the mass increase parameter of the vehicle model during a side-impact collision does not meet the accuracy requirements.

[0066] Hourglass energy, calculated by the simulation algorithm during a side-impact collision, is a non-physical zero-energy deformation data resulting from the conversion of kinetic energy and internal deformation energy of the vehicle model. If the hourglass energy of the vehicle model is less than a preset second threshold, then the hourglass energy meets the accuracy requirements. Optionally, the second threshold can be 5% of the total energy of the vehicle model; otherwise, the hourglass energy does not meet the accuracy requirements.

[0067] To determine whether the simplified side-impact model meets its accuracy requirements, one possible approach is to determine whether the mass increase parameter and hourglass energy of the simplified side-impact model before and after the side-impact condition meet their respective thresholds; if not, then the simplified side-impact model is determined not to meet the accuracy requirements.

[0068] The mass increase parameter is the mass automatically added to the simplified side-impact model by the simulation algorithm when simulating a side-impact collision. If the mass increase parameter of the simplified side-impact model is less than a preset third threshold, then the mass increase parameter of the simplified side-impact model meets the accuracy requirements. Optionally, the third threshold can be 5% of the mass of the simplified side-impact model before the side-impact collision; otherwise, the mass increase parameter of the simplified side-impact model does not meet the accuracy requirements.

[0069] The hourglass energy is a non-physical zero-energy deformation data generated by the conversion of kinetic energy and internal deformation energy in a simplified side-impact model calculated by a simulation algorithm when simulating a side-impact collision. If the hourglass energy of the simplified side-impact model is less than a preset fourth threshold, then the hourglass energy of the simplified side-impact model meets the accuracy requirements. Optionally, the fourth threshold can be 5% of the total energy of the simplified side-impact model; otherwise, the hourglass energy of the simplified side-impact model does not meet the accuracy requirements.

[0070] like Figure 5 The figure shown is an energy change curve of a simplified side-impact model provided in an embodiment of this application. Figure 5As shown, the energy change curve includes the curve of the total energy of the simplified side collision model changing with time under the side collision condition and the curve of the hourglass energy changing with time. Each energy curve is smooth without abrupt changes, and the hourglass energy is less than 5% of the total energy of the simplified side collision model, which is less than the preset fourth threshold, indicating that the simplified side collision model meets the accuracy requirements.

[0071] like Figure 6 The diagram shows a flowchart of another method for establishing a simplified side-impact model provided in this application. In the process of constructing the simplified side-impact model, in order to reproduce the side-impact condition in the simplified side-impact model and obtain the collision displacement data of the boundary nodes of the simplified side-impact model, it is necessary to ensure that the simplified side-impact model and the full-vehicle side-impact model have the same centroid and mass. Therefore, before step S106, the following steps may be included:

[0072] Step S601: Determine the first center of gravity position of the vehicle model in the side impact collision.

[0073] Step S602: Determine the second centroid position of the simplified side-impact model. The second centroid position is used to assign mass to the simplified side-impact model to obtain the first mass point.

[0074] Step S603: Based on the first and second centroid positions, determine the third centroid position in the simplified side-collision model to simulate the non-collision side model. The third centroid position is used to assign mass to the non-collision side model to obtain the second mass point.

[0075] To determine the location of the third center of gravity for simulating the non-collision side model in a simplified side-impact model, one possible approach is to map the first center of gravity of the full-vehicle model in the side-impact model to the coordinate system of the simplified side-impact model; determine the first distance data of the first and second center of gravity locations based on their coordinates; and determine the coordinates of the third center of gravity of the non-collision side model based on its mass, the first distance data, and the mass of the non-collision side model.

[0076] Step S604: Merge the first mass point and the second mass point so that the simplified side collision model has the same mass as the full-vehicle side collision model.

[0077] Through the above steps, the constructed simplified side collision model can have the same centroid and mass as the full-vehicle side collision model, thus making the simplified side collision model have similar characteristics to the full-vehicle side collision model. When the collision displacement file is applied to the simplified side collision model, the side collision condition can be reproduced in the simplified side collision model, and the collision displacement data of the boundary nodes of the simplified side collision model can be obtained.

[0078] like Figure 7 The diagram shown is a structural schematic of a device for creating a simplified side collision model according to an embodiment of this application. Figure 7 As shown, the device for establishing the simplified side collision model may include: an interception module 701, a selection module 702, a marking module 703, a collision simulation module 704, and a processing module 705.

[0079] The interception module 701 is used to determine the interception position in the side collision vehicle model so as to intercept the simplified side collision model from the side collision vehicle model according to the interception position.

[0080] Select module 702, used to select boundary nodes from the cut-off position of the simplified model of side collision.

[0081] The marking module 703 is used to determine the marking positions corresponding to the boundary nodes in the side-impact vehicle model.

[0082] The collision simulation module 704 is used to determine the collision displacement data of the marked positions of the whole vehicle model in the side collision under the side collision condition; generate a collision displacement file based on the collision displacement data; apply the collision displacement file to the simplified side collision model to reproduce the collision condition in the simplified side collision model, and obtain the collision displacement data of the boundary nodes of the simplified side collision model.

[0083] Processing module 705 is used to determine the correlation coefficient between the collision displacement data of the full-vehicle model and the collision displacement data of the simplified side-collision model; to determine whether the simplified side-collision model meets the accuracy requirements based on the correlation coefficient; and to re-determine the interception position in the full-vehicle model through the interception module if the simplified side-collision model does not meet the accuracy requirements, so as to re-intercept the simplified side-collision model based on the re-determined interception position.

[0084] Figure 7 The apparatus for creating a simplified side-collision model provided in the illustrated embodiment can be used to execute the embodiments of this application. Figure 1 The implementation principle and technical effects of the method embodiment shown can be further referred to the relevant description in the method embodiment.

[0085] Corresponding to the above embodiments, this application also provides an electronic device. Figure 8This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 800 may include a processor 801, a memory 802, and a communication unit 803. These components communicate through one or more buses. Those skilled in the art will understand that the structure of the electronic device shown in the figure does not constitute a limitation on the embodiments of the present invention. It may be a bus-shaped structure or a star-shaped structure, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0086] like Figure 8 As shown, the aforementioned electronic device may include at least one processor; and at least one memory communicatively connected to the processor, wherein the memory stores program instructions executable by the processor, and the processor can execute the embodiments of the present invention by calling the program instructions. Figures 1-7 The embodiment shown provides a method for establishing a simplified side collision model.

[0087] The communication unit 803 is used to establish a communication channel, enabling the electronic device to communicate with other devices. It receives user data sent by other devices or sends user data to other devices.

[0088] The processor 801 serves as the control center of the electronic device, connecting various parts of the device via interfaces and lines. It executes software programs, instructions, and / or modules stored in the memory 802, and calls data stored in the memory to perform various functions and / or process data. The processor can be composed of integrated circuits (ICs), such as a single packaged IC or multiple packaged ICs with the same or different functions connected together. For example, the processor 801 may consist only of a central processing unit (CPU). In this embodiment, the CPU may have a single processing core or include multiple processing cores.

[0089] The memory 802 is used to store the execution instructions of the processor 801. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0090] When the execution instructions in memory 802 are executed by processor 801, the electronic device 800 is able to perform operations. Figure 1Some or all of the steps in the illustrated embodiments.

[0091] In a specific implementation, the present invention also provides a computer storage medium, wherein the computer storage medium may store a program, which, when executed, may include some or all of the steps in the various embodiments of the simulation scene generation method provided by the present invention. The storage medium may be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0092] In a specific implementation, the present invention also provides a computer program product, wherein the computer program product includes executable instructions, which, when executed on a computer, cause the computer to perform some or all of the steps in various embodiments of the simulation scene generation method provided by the present invention.

[0093] Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or certain parts of the embodiments of the present invention.

[0094] The same or similar parts between the various embodiments in this specification can be referred to mutually. In particular, the device embodiments and terminal embodiments are basically similar to the method embodiments, so the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

Claims

1. A method for establishing a simplified side-collision model, characterized in that, include: Determine the cut-off position in the full vehicle model of side impact, so as to obtain a simplified side impact model from the full vehicle model of side impact based on the cut-off position; Boundary nodes are selected from the cut-off positions of the simplified side collision model; In the side-impact vehicle model, determine the marker positions corresponding to the boundary nodes; Determine the collision displacement data of the marked position of the vehicle model in the side collision under the side collision condition; Generate a collision displacement file based on the collision displacement data; The collision displacement file is applied to the simplified side collision model to reproduce the collision condition in the simplified side collision model, thereby obtaining the collision displacement data of the boundary nodes of the simplified side collision model. Determine the correlation coefficient between the collision displacement data of the full-vehicle side-impact model and the collision displacement data of the simplified side-impact model; Based on the correlation coefficient, determine whether the simplified side collision model meets the accuracy requirements; If the simplified side collision model does not meet the accuracy requirements, the cut-off position is re-determined in the full vehicle side collision model, so that the simplified side collision model is re-cut according to the re-determined cut-off position. The determination of the correlation coefficient between the collision displacement data of the full-vehicle side-impact model and the collision displacement data of the simplified side-impact model includes: Based on the collision displacement data of the side-impact vehicle model, a velocity curve at the B-pillar waistline position of the side-impact vehicle model is generated. Based on the collision displacement data of the simplified side collision model, a velocity curve at the B-pillar waistline position of the simplified side collision model is generated. The velocity curve at the B-pillar waistline position of the full-vehicle model in the side collision and the velocity curve at the B-pillar waistline position of the simplified side collision model are fitted with a correlation coefficient. The B-pillar waistline of the full-vehicle model in the side collision is located on the pillar connecting the front and rear doors of the full-vehicle model in the side collision. The B-pillar waistline of the simplified side collision model is located on the pillar connecting the front and rear doors of the simplified side collision model. The horizontal axis of the velocity curve is time, and the vertical axis is velocity. The velocity curve is used to represent the velocity change of the relevant B-pillar waistline position under the side collision condition.

2. The method according to claim 1, characterized in that, The intercepted location includes the central tunnel position of the side-impact vehicle model, which extends from the front to the rear of the side-impact vehicle model, and the side-impact vehicle model is symmetrical about the central tunnel position.

3. The method according to claim 1, characterized in that, After obtaining the simplified side collision model from the side collision vehicle model according to the cut-off position, the remaining part of the side collision vehicle model is the non-collision side model. Before applying the collision displacement file to the simplified side collision model to reproduce the collision condition in the simplified side collision model and obtaining the collision displacement data of the boundary nodes of the simplified side collision model, the method further includes: Determine the first center of gravity position of the vehicle model involved in the side impact; Determine the second centroid position of the simplified side-impact model, wherein the second centroid position is used to assign mass to the simplified side-impact model to obtain a first mass point; Based on the first centroid position and the second centroid position, a third centroid position is determined in the simplified side collision model to simulate the non-collision side model, wherein the third centroid position is used to assign mass to the non-collision side model to obtain a second mass point; The first mass point and the second mass point are fused together so that the simplified side-impact model has the same mass as the full-vehicle side-impact model.

4. The method according to claim 3, characterized in that, Based on the first and second centroid positions, a third centroid position is determined in the simplified side-impact model to simulate the non-collision side model, including: Map the first centroid position of the side-impact vehicle model to the coordinate system of the simplified side-impact model; Based on the coordinates of the first centroid position and the second centroid position, determine the first distance data between the first centroid position and the second centroid position; Based on the mass of the simplified side-collision model, the first distance data, and the mass of the non-collision side model, the coordinates of the third centroid position of the non-collision side model are determined.

5. The method according to claim 1, characterized in that, The collision displacement file includes velocity parameters, which are the velocity parameters of a side impact barrier. The step of generating a collision displacement file based on the collision displacement data includes: using keywords set in the simulation algorithm. INTERFACE_COMPONENT_NODE is used to generate the collision displacement file from the collision displacement data.

6. The method according to claim 1, characterized in that, The method further includes: Determine whether the mass increase parameter and hourglass energy of the vehicle model before and after the side collision condition meet their respective thresholds. If the requirements are not met, then the side-impact vehicle model is determined to be non-compliant with accuracy requirements.

7. The method according to claim 1, characterized in that, The method further includes: Determine whether the mass increase parameter and hourglass energy of the simplified side collision model before and after the side collision condition meet their respective thresholds. If the requirements are not met, then the simplified side collision model is determined to be inconsistent with the accuracy requirements.

8. The method according to claim 1, characterized in that, The method further includes: If the simplified side collision model meets the accuracy requirements, then the key structural components of the simplified side collision model are determined. The key structural components include the B-pillar, front seat crossbeam, sill, and door anti-collision beam of the simplified side collision model. Based on the collision deformation of the key structural component, the parameters to be optimized for the key structural component are determined, including the cross-sectional shape, thickness, and material grade of the key structural component. The key structural components of the simplified side collision model are optimized based on the parameters to be optimized for the key structural components.

9. The method according to claim 8, characterized in that, The B-pillar is the pillar connecting the front and rear doors of the simplified side-impact model; the front seat crossbeam is the crossbeam connecting the central passage and the sill beam of the simplified side-impact model; the sill is located directly below the door of the simplified side-impact model; and the door anti-collision beam is a crossbeam added to the internal structure of the door.

10. A device for establishing a simplified side-collision model, characterized in that, include: The interception module is used to determine the interception position in the side collision full vehicle model, so as to intercept a simplified side collision model from the side collision full vehicle model according to the interception position; A selection module is used to select boundary nodes from the cut-off position of the simplified side collision model; The marking module is used to determine the marking position corresponding to the boundary node in the side-impact vehicle model; The collision simulation module is used to determine the collision displacement data of the marked position of the side collision vehicle model under the side collision condition; generate a collision displacement file based on the collision displacement data; apply the collision displacement file to the side collision simplified model to reproduce the collision condition in the side collision simplified model, and obtain the collision displacement data of the boundary node of the side collision simplified model. The processing module is used to determine the correlation coefficient between the collision displacement data of the full-vehicle side-impact model and the collision displacement data of the simplified side-impact model; determine whether the simplified side-impact model meets the accuracy requirements based on the correlation coefficient; and if the simplified side-impact model does not meet the accuracy requirements, re-determine the interception position in the full-vehicle side-impact model through the interception module, so as to re-intercept the simplified side-impact model based on the re-determined interception position. The determination of the correlation coefficient between the collision displacement data of the full-vehicle side-impact model and the collision displacement data of the simplified side-impact model includes: Based on the collision displacement data of the side-impact vehicle model, a velocity curve at the B-pillar waistline position of the side-impact vehicle model is generated. Based on the collision displacement data of the simplified side collision model, a velocity curve at the B-pillar waistline position of the simplified side collision model is generated. The velocity curve at the B-pillar waistline position of the full-vehicle model in the side collision and the velocity curve at the B-pillar waistline position of the simplified side collision model are fitted with a correlation coefficient. The B-pillar waistline of the full-vehicle model in the side collision is located on the pillar connecting the front and rear doors of the full-vehicle model in the side collision. The B-pillar waistline of the simplified side collision model is located on the pillar connecting the front and rear doors of the simplified side collision model. The horizontal axis of the velocity curve is time, and the vertical axis is velocity. The velocity curve is used to represent the velocity change of the relevant B-pillar waistline position under the side collision condition.

11. An electronic device, characterized in that, The device includes a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device performs the method according to any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 9.

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