Simplified modeling methods, systems, storage media, and electronic devices for automotive side impacts

Abstract

This invention relates to a simplified modeling method, system, storage medium, and electronic device for vehicle side impact collisions. The method includes: when a moving barrier collides with the side of a vehicle, acquiring a complete vehicle model and dividing the model into a collision-deformed portion and a non-collision-deformed portion; dividing the non-collision-deformed portion into a simplified vehicle portion and the tires on the non-collision side, and acquiring the center of mass position of the simplified vehicle portion; constructing a mass point at the center of mass position and connecting the mass point to the collision-deformed portion and the tires on the non-collision side, respectively, to obtain a simplified vehicle model; and generating a simplified vehicle side impact collision model based on the simplified vehicle model and the moving barrier. This invention simplifies the vehicle side impact collision model by simplifying the vehicle's structure and dividing the model into regions, thus improving modeling speed. The simplified model retains the deformation portion of the vehicle during the collision, reducing simulation time while accurately simulating the collision contact response process between the vehicle and the moving barrier.

Description

Technical Field

[0001] This invention relates to the field of automotive crashworthiness technology, and more particularly to a simplified modeling method, system, storage medium, and electronic device for automotive side impacts. Background Technology

[0002] Vehicle crashworthiness is a major research area in the field of automotive passive safety. Vehicle crashworthiness simulation is primarily used to simulate the deformation of the vehicle body during full-vehicle crash tests. The side-impact simulation model mainly consists of the entire vehicle and a moving barrier. Currently, the main modeling method for side-impact collisions is to use finite element method (FEM) software to create a full-vehicle side-impact simulation model. The disadvantages of this method are: modeling the entire vehicle requires complete vehicle data. Due to the complexity and numerous ribs in the vehicle data, side-impact modeling requires significant manpower and time, leading to delays in crashworthiness optimization simulations and hindering project development. Furthermore, the small mesh size and large number of meshes in the model result in long computation times for the entire side-impact model, which is detrimental to rapid optimization of vehicle crashworthiness.

[0003] Therefore, there is an urgent need to provide a technical solution to address the aforementioned technical problems. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a simplified modeling method, system, storage medium, and electronic device for automobile side collisions.

[0005] The technical solution of the simplified modeling method for vehicle side collisions of the present invention is as follows:

[0006] S1. When the moving barrier collides with the side of the target vehicle, the first full vehicle model of the target vehicle after the collision is obtained, and the first full vehicle model is divided into the original collision deformation part on the collision side and the original non-collision deformation part on the non-collision side.

[0007] S2. Based on the structure of the target vehicle, the original non-collision deformed part is divided into a preset simplified vehicle part and the vehicle tire on the non-collision side, and the centroid position of the preset simplified vehicle part is obtained.

[0008] S3. Construct a target mass point at the center of mass position with the same mass as the preset simplified car part, and connect the target mass point to the original collision deformation part and the car tire on the non-collision side respectively to obtain the simplified car model of the target car.

[0009] S4. Based on the simplified car model and the moving barrier, generate a simplified side collision model of the target car when it collides with the moving barrier from the side.

[0010] The beneficial effects of the simplified modeling method for vehicle side collisions of the present invention are as follows:

[0011] The method of the present invention simplifies the side collision model of a car by simplifying the structure of the car and dividing the area, thereby improving the modeling speed. The simplified whole vehicle model retains the deformed parts of the whole vehicle in the collision, which can accurately simulate the collision contact response process between the whole vehicle and the moving barrier while reducing the model simulation time.

[0012] Based on the above scheme, the simplified modeling method for vehicle side collisions of the present invention can be further improved as follows.

[0013] Furthermore, the step of connecting the target mass point to the original collision deformation portion and the non-collision side of the vehicle tire includes:

[0014] Based on a rigid connection method, the target mass point is connected to the original collision deformation part and the car tire on the non-collision side, respectively.

[0015] Furthermore, it also includes:

[0016] S5. Based on the first simulation results of the target vehicle during the collision process generated by the complete side collision model and the second simulation results of the target vehicle during the collision process generated by the simplified side collision model, the simplified side collision model is iteratively optimized until the preset optimization conditions are met, thus obtaining the optimized simplified side collision model.

[0017] Furthermore, the first simulation result includes: the intrusion velocity curve and the intrusion displacement curve of the first B-pillar; the second simulation result includes: the intrusion velocity curve and the intrusion displacement curve of the second B-pillar; S5 includes:

[0018] S51. Obtain the intrusion velocity curve and the intrusion displacement curve of the first B-pillar during the collision process generated by the target vehicle based on the complete side collision model of the vehicle, and obtain the intrusion velocity curve and the intrusion displacement curve of the second B-pillar during the collision process generated by the target vehicle based on the simplified side collision model of the vehicle.

[0019] S52. Determine whether the difference between the first intrusion velocity peak value in the first B-pillar intrusion velocity curve and the second intrusion velocity peak value in the second B-pillar intrusion velocity curve is less than a first threshold, and obtain a first determination result; determine whether the changing trend of the first B-pillar intrusion velocity curve is the same as the changing trend of the second B-pillar intrusion velocity curve, and obtain a second determination result; determine whether the difference between the first displacement peak value in the first B-pillar intrusion displacement curve and the second displacement peak value in the second B-pillar intrusion displacement curve is less than a second threshold, and obtain a third determination result; determine whether the changing trend of the first B-pillar intrusion displacement curve is the same as the changing trend of the second B-pillar intrusion displacement curve, and obtain a fourth determination result;

[0020] S53. When the first judgment result is negative, or the second judgment result is negative, or the third judgment result is negative, or the fourth judgment result is negative, adjust the division ratio of the original collision deformation part and the original non-collision deformation part, and return to execute S1 until the first judgment result is positive, the second judgment result is positive, the third judgment result is positive, and the fourth judgment result is positive, and the optimized simplified collision model of the car side is obtained.

[0021] The technical solution of the simplified modeling system for vehicle side collisions of the present invention is as follows:

[0022] It includes: an acquisition module, a first processing module, a second processing module, and a generation module;

[0023] The acquisition module is used to: when the moving barrier collides with the side of the target vehicle, acquire the first whole vehicle model of the target vehicle after the collision, and divide the first whole vehicle model into the original collision deformation part on the collision side and the original non-collision deformation part on the non-collision side.

[0024] The first processing module is used to: based on the structure of the target vehicle, divide the original non-collision deformed part into a preset simplified vehicle part and the vehicle tire on the non-collision side, and obtain the centroid position of the preset simplified vehicle part;

[0025] The second processing module is used to: construct a target mass point at the center of mass position with the same mass as the preset simplified car part, and connect the target mass point to the original collision deformation part and the car tire on the non-collision side respectively to obtain a simplified car model of the target car;

[0026] The generation module is used to: generate a simplified side collision model of the target vehicle when it collides with the moving barrier from the side, based on the simplified vehicle model and the moving barrier.

[0027] The advantages of the simplified modeling system for side collisions of automobiles of the present invention are as follows:

[0028] The system of the present invention simplifies the side collision model of a car by simplifying the structure of the car and dividing the area, thereby improving the modeling speed. The system retains the deformed parts of the car in the collision in the simplified whole vehicle model, which can accurately simulate the collision contact response process between the whole vehicle and the moving barrier while reducing the model simulation time.

[0029] Based on the above solution, the simplified modeling system for side collisions of automobiles of the present invention can be further improved as follows.

[0030] Furthermore, the second processing module is specifically used for:

[0031] Based on a rigid connection method, the target mass point is connected to the original collision deformation part and the car tire on the non-collision side, respectively.

[0032] Furthermore, it also includes: an optimization module;

[0033] The optimization module is used to: iteratively optimize the simplified side-collision model of the vehicle based on the first simulation result of the target vehicle during the collision process generated by the complete side-collision model of the vehicle and the second simulation result of the target vehicle during the collision process generated by the simplified side-collision model of the vehicle, until the preset optimization conditions are met, and obtain the optimized simplified side-collision model of the vehicle.

[0034] Furthermore, the first simulation results include: the intrusion velocity curve and the intrusion displacement curve of the first B-pillar; the second simulation results include: the intrusion velocity curve and the intrusion displacement curve of the second B-pillar; the optimization module includes: a first optimization module, a second optimization module, and a third optimization module;

[0035] The first optimization module is used to: obtain the first B-pillar intrusion speed curve and the first B-pillar intrusion displacement curve during the collision process generated by the target vehicle based on the complete side collision model of the vehicle, and obtain the second B-pillar intrusion speed curve and the second B-pillar intrusion displacement curve during the collision process generated by the target vehicle based on the simplified side collision model of the vehicle.

[0036] The second optimization module is used to: determine whether the difference between the first intrusion velocity peak value in the first B-pillar intrusion velocity curve and the second intrusion velocity peak value in the second B-pillar intrusion velocity curve is less than a first threshold, and obtain a first determination result; determine whether the changing trend of the first B-pillar intrusion velocity curve is the same as the changing trend of the second B-pillar intrusion velocity curve, and obtain a second determination result; determine whether the difference between the first displacement peak value in the first B-pillar intrusion displacement curve and the second displacement peak value in the second B-pillar intrusion displacement curve is less than a second threshold, and obtain a third determination result; determine whether the changing trend of the first B-pillar intrusion displacement curve is the same as the changing trend of the second B-pillar intrusion displacement curve, and obtain a fourth determination result;

[0037] The third optimization module is used to: adjust the division ratio of the original collision deformation part and the original non-collision deformation part when the first judgment result is negative, the second judgment result is negative, the third judgment result is negative, or the fourth judgment result is negative, and return to call the acquisition module until the first judgment result is positive, the second judgment result is positive, the third judgment result is positive, and the fourth judgment result is positive, so as to obtain the optimized simplified collision model of the car side.

[0038] The technical solution of a storage medium according to the present invention is as follows:

[0039] The storage medium stores instructions that, when read by a computer, cause the computer to execute the steps of the simplified modeling method for side collisions of a vehicle as described in this invention.

[0040] The technical solution of an electronic device according to the present invention is as follows:

[0041] The invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the computer program, it causes the computer to perform the steps of the simplified modeling method for side-impact collisions of a vehicle as described in this invention. Attached Figure Description

[0042] Figure 1 This is a flowchart illustrating the simplified modeling method for vehicle side collisions according to an embodiment of the present invention.

[0043] Figure 2 This is a schematic diagram of the moving barrier model in the simplified modeling method for vehicle side collisions according to an embodiment of the present invention.

[0044] Figure 3 This is a schematic diagram of the structure of the first vehicle model in the simplified modeling method for side collisions of automobiles according to an embodiment of the present invention;

[0045] Figure 4This is a schematic diagram of the left and right side boundary lines of a vehicle in the simplified modeling method for side collisions according to an embodiment of the present invention.

[0046] Figure 5 This is a schematic diagram of the simplified vehicle side collision model in the simplified vehicle side collision modeling method of this invention.

[0047] Figure 6 This is a comparison diagram of the intrusion velocity curve of the first B-pillar of the complete side-impact model of a car and the intrusion velocity curve of the second B-pillar of the simplified side-impact model of a car in the simplified modeling method of the present invention.

[0048] Figure 7 This is a comparison diagram of the first B-pillar intrusion displacement curve of the complete vehicle side collision model and the second B-pillar intrusion displacement curve of the simplified vehicle side collision model in the simplified modeling method of the present invention.

[0049] Figure 8 This is a schematic diagram of the simplified modeling system for vehicle side collisions according to an embodiment of the present invention;

[0050] Explanation of icon numbers:

[0051] 1. The dividing line between the left and right sides of the car; 2. The tires of the car on the non-collision side; 3. Rigid unit; 4. Target mass; 5. A 50-70mm wide area at the edge of the original collision deformation part; 6. Moving barrier. Detailed Implementation

[0052] like Figure 1 As shown, the simplified modeling method for vehicle side collisions according to an embodiment of the present invention includes the following steps:

[0053] S1. When the moving barrier collides with the side of the target vehicle, obtain the first full vehicle model of the target vehicle after the collision, and divide the first full vehicle model into the original collision deformation part on the collision side and the original non-collision deformation part on the non-collision side.

[0054] Mobile barriers are general-purpose, movable obstacle avoidance devices, belonging to the category of barriers used in automotive collisions. Based on their scope of use, mobile barriers are divided into: obstacle avoidance devices designed and used by individual companies (such as the barrier invented by Geely Automobile) and standardized obstacle avoidance devices required by regulations. Based on whether the barrier itself can move, mobile barriers are divided into: rigid barriers that simulate immovable walls in car-to-wall collisions, and movable barriers that simulate another vehicle impacting the target vehicle in car-to-car collisions.

[0055] In this embodiment, the model structure of the moving barrier is as follows: Figure 2As shown; the target car is the car to be modeled after the collision; the first complete vehicle model is the complete vehicle model created after the target car has collided with the side, and the structural diagram of the first complete vehicle model is shown below. Figure 3 As shown; the original collision deformation part is the side where the target vehicle directly collides with the moving barrier, and this side is called the collision side; the original non-collision deformation part is the side where the target vehicle does not collide with the moving barrier, and this side is called the non-collision side.

[0056] In step S1, the following points need to be explained: ① The process of constructing a full-vehicle model after a side collision is existing technology and will not be elaborated upon here. ② As... Figure 4 As shown, the division of the first vehicle model into two parts is based on the left and right dividing lines of the car. By default, the left and right sides are evenly distributed in the initial division, but this can be continuously adjusted according to needs to improve the accuracy of the simplified side collision model of the car. ③ The area where the target car collides (collision side) can be any door side of the entire car, which can be the left side of the car (i.e., the side of the driver's seat) or the right side of the car (i.e., the side of the passenger seat), without any restrictions.

[0057] Specifically, when a moving barrier collides with the side of a target vehicle, a first full-vehicle model of the vehicle after the collision is obtained. Based on the characteristic that the portion between the non-collision side of the vehicle and the left-right dividing line of the target vehicle typically does not deform, the first full-vehicle model is divided using the left-right dividing line into the original collision deformation portion on the collision side and the original non-collision deformation portion on the non-collision side. For example... Figure 4 As shown, assuming the target car collides with a moving barrier on its left side, the original collision deformation is the area to the left of the car's left-right boundary, and the original non-collision deformation is the area to the right of the car's left-right boundary. Dividing the car into collision deformation and non-collision deformation parts allows for different treatment of different parts when building a side-impact model.

[0058] In this embodiment, the following points need to be explained regarding the characteristics used when a moving barrier collides with the side of a target vehicle: ① This characteristic refers to the deformation, such as dents, that occurs on the vehicle body when the collision side is impacted. ② The deformation process of the vehicle's components consumes the energy of the collision (the reason for energy consumption is that the components are impacted, i.e., subjected to force, and cannot withstand it, thus deforming and displacing. According to Newton's law of motion, energy = force × displacement, it can be seen that the deformation process of the components absorbs a portion of the collision energy). Therefore, as the collision process progresses, more and more components deform and consume energy until the kinetic energy provided by the moving barrier is no longer sufficient to force the components on the vehicle body to deform. ③ The deformation exhibited on the vehicle body in ② above decreases in intensity from the side of the collision contact to the side that is not impacted, gradually decreasing to 0. ④ Generally, under the side impact conditions specified by regulations, the impact deformation drops to 0 near the centerline on the left and right sides of the vehicle body. ⑤ The function of this characteristic is to clarify that the vehicle will not deform approximately near the centerline on the left and right sides of the vehicle body, thus providing a theoretical basis for simplifying the non-collision side.

[0059] S2. Based on the structure of the target vehicle, the original non-collision deformed part is divided into a preset simplified vehicle part and the vehicle tire on the non-collision side, and the centroid position of the preset simplified vehicle part is obtained.

[0060] The simplified portion of the vehicle in the original collision deformation includes all parts except the tires on the non-collision side, such as the seats, doors, and overhead and footwell components on the non-collision side of the driver's cab. The center of gravity position refers to the coordinates of the simplified portion of the vehicle relative to the entire simplified portion.

[0061] In step S2, the following points need to be explained: ① The process of obtaining the centroid position of the preset simplified part of the car is existing technology, and the specific process will not be elaborated here. ② The structural characteristics of the car are used to divide parts with similar structural motion postures into the same region, and parts with significantly different structural motion postures into different regions; the purpose of dividing into different regions is to process different parts of the car differently during modeling. In this embodiment, the part with significantly different structural motion postures is the car tire.

[0062] Specifically, based on the structure of the target vehicle, the original non-collision deformed part is divided into two parts: one is the pre-defined simplified vehicle part, and the other is the vehicle tire on the non-collision side. After the division, the centroid analysis of the pre-defined simplified vehicle part is performed to obtain the centroid position of the pre-defined simplified vehicle part.

[0063] S3. Construct a target mass point at the center of mass that has the same mass as the preset simplified car part, and connect the target mass point to the original collision deformation part and the car tire on the non-collision side to obtain the simplified car model of the target car.

[0064] The target mass is a point with mass used to replace a pre-defined simplified part of the vehicle. The target mass has the same mass as the pre-defined simplified part. The connection between the target mass and the original collision deformation part and the tire on the non-collision side is a rigid connection.

[0065] Specifically, a target mass point with the same mass as the preset simplified car part is set at the center of mass position of the preset simplified car part, and the target mass point is fixedly connected to the original collision deformation part and the car tire on the non-collision side by a rigid connection method. The preset simplified car part is then deleted from the first whole vehicle model, and finally a simplified car model of the target car is obtained.

[0066] S4. Based on the simplified car model and the moving barrier, generate a simplified side collision model of the target car when it collides with the moving barrier from the side.

[0067] Specifically, such as Figure 5 As shown, a simplified car model and a moving barrier are combined to generate a simplified side collision model of the target car when it collides with the moving barrier from the side.

[0068] Preferably, the step of connecting the target mass point to the original collision deformation portion and the non-collision side of the vehicle tire includes:

[0069] Based on a rigid connection method, the target mass point is connected to the original collision deformation part and the car tire on the non-collision side, respectively.

[0070] In this embodiment, the rigid connection method is achieved through Rigid units. Specifically, the target mass is fixedly connected to the original collision deformation portion and the tire on the non-collision side using Rigid units. When connecting the original collision deformation portion, the Rigid unit connects a 50-70mm wide area along the edge of the original collision deformation portion. After the connection is completed, the target mass acts as a substitute for the preset simplified part of the car in the simplified side collision model. This connection method is mainly based on the consideration that using Rigid units to connect the target mass to the collision deformation portion and the tire on the non-collision deformation portion respectively ensures that the weight of the simplified model is consistent with the weight of the complete model. Retaining the original collision deformation portion ensures that the crashworthiness characteristics of the simplified side collision model, such as vehicle body deformation, B-pillar intrusion velocity, and B-pillar intrusion displacement, are consistent with the crashworthiness characteristics of the complete model. Connecting the Rigid unit to the 50-70mm wide edge of the original collision deformation portion avoids hardening the edge of the original collision deformation portion by the Rigid unit while ensuring the connection effect. In addition, retaining the tires on the non-collision side of the car ensures that the simplified side-impact model of the car will not roll over abnormally after being impacted by a moving barrier.

[0071] Besides using Rigid units for fixation, XtraNode type contacts can also be defined for fixation. Specifically, XtraNode type contacts are used to fix the target mass to the original collision deformation part and the tire on the non-collision side of the car. When connecting the original collision deformation part, the rim of the tire on the non-collision side is set as a rigid body, and the rim and the 50-70mm wide area of ​​the edge of the original collision deformation part and the target mass are connected by XtraNode type contacts. After the connection is completed, the target mass acts as a substitute for the preset simplified part of the car in the simplified side collision model. This connection is mainly because using XtraNode type contacts to connect the target mass to the collision deformation part and the tire in the non-collision deformation part respectively can ensure that the weight of the simplified model is consistent with the weight of the complete model. Retaining the original collision deformation part can ensure that the crashworthiness characteristics of the simplified side collision model, such as the body deformation, B-pillar intrusion velocity, and B-pillar intrusion displacement value during the collision, are consistent with the crashworthiness characteristics of the complete model. The XtraNode type of contact connects to the edge of the original collision deformation part with a width of 50-70mm. This avoids hardening of the edge of the original collision deformation part due to excessive connection and ensures the connection effect.

[0072] It's important to note that XtraNode type contact is a type of contact in automotive collision models. During collision model simulation, the contact type between two objects needs to be input (common contact types include Automatic singlesurface, Automatic surface to surface, etc.). After the contact type of the two objects is defined during the model building phase, the software will calculate and determine the positional relationship between the two objects according to the defined contact type, determining whether contact or compression has occurred. If no contact is defined and only a force (such as gravity) is applied, the two objects will pass through each other's interiors. XtraNode contact controls the relative position between a rigid body and another deformable body, ensuring no change in position. Therefore, when using this type of contact, the wheel hub is first set as a rigid body.

[0073] More preferably, it also includes:

[0074] S5. Based on the first simulation results of the target vehicle during the collision process generated by the complete side collision model and the second simulation results of the target vehicle during the collision process generated by the simplified side collision model, the simplified side collision model is iteratively optimized until the preset optimization conditions are met, thus obtaining the optimized simplified side collision model.

[0075] The first simulation result is the simulation result obtained by simulating the collision of the target vehicle based on the complete side collision model of the vehicle; the second simulation result is the simulation result obtained by simulating the collision of the target vehicle based on the simplified side collision model of the vehicle generated in this embodiment.

[0076] In step S5, the following points need to be explained: ① The complete side-impact model of a car consists of a first full-vehicle model and a moving barrier. The specific construction process is existing technology and will not be elaborated here. ② Using the simplified side-impact model generated in this embodiment, the car crashworthiness simulation test was completed in 11 hours on a 20-core HP workstation; while using the complete side-impact model, the car crashworthiness simulation test took 17 hours to complete on the same workstation. ③ Because the target car's full-vehicle model was structurally simplified during modeling, the simulation accuracy of the collision process simulated by the model will inevitably be affected. To improve the simulation accuracy, the constructed model needs to be calibrated. The simplified side-impact model is based on the simplified car model; therefore, the first simulation result of the complete side-impact model can be used as standard data to calibrate the simplified side-impact model, thereby improving its accuracy.

[0077] Preferably, the first simulation result includes: the intrusion velocity curve and the intrusion displacement curve of the first B-pillar; the second simulation result includes: the intrusion velocity curve and the intrusion displacement curve of the second B-pillar; S5 includes:

[0078] S51. Obtain the intrusion velocity curve and the intrusion displacement curve of the first B-pillar during the collision process generated by the target vehicle based on the complete side collision model of the vehicle, and obtain the intrusion velocity curve and the intrusion displacement curve of the second B-pillar during the collision process generated by the target vehicle based on the simplified side collision model of the vehicle.

[0079] Specifically, such as Figure 6 As shown, a comparison chart of the vehicle's B-pillar intrusion speed curves is constructed based on the first B-pillar intrusion speed curve generated during the collision process from the complete side-impact model of the target vehicle and the second B-pillar intrusion speed curve generated during the collision process from the simplified side-impact model of the target vehicle. Figure 7 As shown, a comparison chart of B-pillar intrusion displacement curves is constructed based on the first B-pillar intrusion displacement curve generated during the collision process of the target vehicle according to the complete side collision model and the second B-pillar intrusion displacement curve generated during the collision process of the target vehicle according to the simplified side collision model.

[0080] In step S51, the following points need to be explained: ① Figure 6 The horizontal axis represents the time point of the collision process, and the vertical axis represents the B-pillar intrusion velocity during the collision process; the dashed line represents the first B-pillar intrusion velocity curve, and the solid line represents the second B-pillar intrusion velocity curve. ② Figure 7 The horizontal axis represents the time point of the collision process, and the vertical axis represents the B-pillar intrusion displacement value during the collision process; the dashed line represents the first B-pillar intrusion displacement curve, and the solid line represents the second B-pillar intrusion displacement curve.

[0081] S52. Determine whether the difference between the first intrusion velocity peak in the first B-pillar intrusion velocity curve and the second intrusion velocity peak in the second B-pillar intrusion velocity curve is less than a first threshold, and obtain a first determination result; determine whether the changing trend of the first B-pillar intrusion velocity curve is the same as the changing trend of the second B-pillar intrusion velocity curve, and obtain a second determination result; determine whether the difference between the first displacement peak in the first B-pillar intrusion displacement curve and the second displacement peak in the second B-pillar intrusion displacement curve is less than a second threshold, and obtain a third determination result; determine whether the changing trend of the first B-pillar intrusion displacement curve is the same as the changing trend of the second B-pillar intrusion displacement curve, and obtain a fourth determination result.

[0082] Among them, the first intrusion speed peak is the peak value in the first B-pillar intrusion speed curve; the second intrusion speed peak is the peak value in the second B-pillar intrusion speed curve; the changing trend includes an upward trend and a downward trend.

[0083] In step S52, the following points need to be explained: ① The interval between each time point is 0.04S. In this embodiment, the curve uses 0-0.12S. The time interval can be adjusted according to user needs and is not limited here. ② The first threshold and the second threshold are set and adjusted according to user needs and are not limited here.

[0084] S53. When the first judgment result is negative, or the second judgment result is negative, or the third judgment result is negative, or the fourth judgment result is negative, adjust the division ratio of the original collision deformation part and the original non-collision deformation part, and return to execute S1 until the first judgment result is positive, the second judgment result is positive, the third judgment result is positive, and the fourth judgment result is positive, and the optimized simplified collision model of the car side is obtained.

[0085] Specifically, when the preset optimization conditions are not met, the division ratio of the original collision deformation part and the original non-collision deformation part of the target car is continuously corrected, thereby reducing the error between the first B-pillar intrusion velocity curve and the first B-pillar intrusion displacement curve corresponding to the simplified model and the second B-pillar intrusion velocity and the second B-pillar intrusion displacement curve of the complete model, until the error is less than the corresponding preset threshold.

[0086] The technical solution of this embodiment simplifies the side collision model of a car by simplifying the structure of the car and dividing the area, thereby improving the modeling speed. The simplified whole vehicle model retains the deformed parts of the whole vehicle in the collision, which can accurately simulate the collision contact response process between the whole vehicle and the moving barrier while reducing the model simulation time.

[0087] like Figure 8 As shown, the simplified modeling system 200 for side collisions of automobiles according to an embodiment of the present invention includes: an acquisition module 210, a first processing module 220, a second processing module 230, and a generation module 240;

[0088] The acquisition module 210 is used to: when the moving barrier collides with the side of the target vehicle, acquire the first whole vehicle model of the target vehicle after the collision, and divide the first whole vehicle model into the original collision deformation part on the collision side and the original non-collision deformation part on the non-collision side.

[0089] The first processing module 220 is used to: based on the structure of the target vehicle, divide the original non-collision deformed part into a preset simplified vehicle part and the vehicle tire on the non-collision side, and obtain the centroid position of the preset simplified vehicle part;

[0090] The second processing module 230 is used to: construct a target mass point at the center of mass position with the same mass as the preset simplified car part, and connect the target mass point to the original collision deformation part and the car tire on the non-collision side respectively to obtain a simplified car model of the target car;

[0091] The generation module 240 is used to: generate a simplified side collision model of the target vehicle when it collides with the moving barrier on the side, based on the simplified vehicle model and the moving barrier.

[0092] Preferably, the second processing module 230 is specifically used for:

[0093] Based on a rigid connection method, the target mass point is connected to the original collision deformation part and the car tire on the non-collision side, respectively.

[0094] Preferably, it also includes: an optimization module;

[0095] The optimization module is used to: iteratively optimize the simplified side-collision model of the vehicle based on the first simulation result of the target vehicle during the collision process generated by the complete side-collision model of the vehicle and the second simulation result of the target vehicle during the collision process generated by the simplified side-collision model of the vehicle, until the preset optimization conditions are met, and obtain the optimized simplified side-collision model of the vehicle.

[0096] Preferably, the first simulation result includes: the intrusion velocity curve of the first B-pillar and the intrusion displacement curve of the first B-pillar; the second simulation result includes: the intrusion velocity curve of the second B-pillar and the intrusion displacement curve of the second B-pillar; the optimization module includes: a first optimization module, a second optimization module and a third optimization module;

[0097] The first optimization module is used to: obtain the first B-pillar intrusion speed curve and the first B-pillar intrusion displacement curve during the collision process generated by the target vehicle based on the complete side collision model of the vehicle, and obtain the second B-pillar intrusion speed curve and the second B-pillar intrusion displacement curve during the collision process generated by the target vehicle based on the simplified side collision model of the vehicle.

[0098] The second optimization module is used to: determine whether the difference between the first intrusion velocity peak value in the first B-pillar intrusion velocity curve and the second intrusion velocity peak value in the second B-pillar intrusion velocity curve is less than a first threshold, and obtain a first determination result; determine whether the changing trend of the first B-pillar intrusion velocity curve is the same as the changing trend of the second B-pillar intrusion velocity curve, and obtain a second determination result; determine whether the difference between the first displacement peak value in the first B-pillar intrusion displacement curve and the second displacement peak value in the second B-pillar intrusion displacement curve is less than a second threshold, and obtain a third determination result; determine whether the changing trend of the first B-pillar intrusion displacement curve is the same as the changing trend of the second B-pillar intrusion displacement curve, and obtain a fourth determination result;

[0099] The third optimization module is used to: adjust the division ratio of the original collision deformation part and the original non-collision deformation part when the first judgment result is negative, the second judgment result is negative, the third judgment result is negative, or the fourth judgment result is negative, and return to call the acquisition module until the first judgment result is positive, the second judgment result is positive, the third judgment result is positive, and the fourth judgment result is positive, so as to obtain the optimized simplified collision model of the car side.

[0100] The technical solution of this embodiment simplifies the side collision model of a car by simplifying the structure of the car and dividing the area, thereby improving the modeling speed. The simplified whole vehicle model retains the deformed parts of the whole vehicle in the collision, which can accurately simulate the collision contact response process between the whole vehicle and the moving barrier while reducing the model simulation time.

[0101] The parameters and steps for implementing the corresponding functions of each module in the simplified modeling system 200 for side collisions of the vehicle described above can be referred to the parameters and steps in the embodiments of the simplified modeling method for side collisions of the vehicle described above, and will not be repeated here.

[0102] An embodiment of the present invention provides a storage medium, comprising: the storage medium storing instructions, which, when a computer reads the instructions, cause the computer to execute steps such as the simplified modeling method for side collisions of automobiles. For details, please refer to the parameters and steps in the embodiment of the simplified modeling method for side collisions of automobiles described above, which will not be repeated here.

[0103] Computer storage media, such as USB flash drives and external hard drives.

[0104] An electronic device provided by an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The feature is that when the processor executes the computer program, it causes the computer to perform steps such as the simplified modeling method for side collisions of automobiles. For details, please refer to the parameters and steps in the embodiments of the simplified modeling method for side collisions of automobiles described above, which will not be repeated here.

[0105] Those skilled in the art will know that the present invention can be implemented as a method, system, storage medium, and electronic device.

[0106] Therefore, the present invention can be implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, the present invention can also be implemented as a computer program product contained in one or more computer-readable media, which contains computer-readable program code. Any combination of one or more computer-readable media can be used. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. Although embodiments of the invention have been shown and described above, it is to be understood that these embodiments are exemplary and should not be construed as limiting the invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the invention.

Claims

1. A simplified modeling method for vehicle side impact, characterized in that, include: S1. When the moving barrier collides with the side of the target vehicle, the first full vehicle model of the target vehicle after the collision is obtained, and the first full vehicle model is divided into the original collision deformation part on the collision side and the original non-collision deformation part on the non-collision side. S2. Based on the structure of the target vehicle, the original non-collision deformed part is divided into a preset simplified vehicle part and the vehicle tire on the non-collision side, and the centroid position of the preset simplified vehicle part is obtained. S3. Construct a target mass point at the center of mass position with the same mass as the preset simplified car part, and connect the target mass point to the original collision deformation part and the car tire on the non-collision side respectively to obtain the simplified car model of the target car. S4. Based on the simplified car model and the moving barrier, generate a simplified side collision model of the car when the target car collides with the moving barrier on the side. S5. Based on the first simulation results of the target vehicle during the collision process generated by the complete side collision model and the second simulation results of the target vehicle during the collision process generated by the simplified side collision model, the simplified side collision model is iteratively optimized until the preset optimization conditions are met, and the optimized simplified side collision model is obtained. The first simulation result includes: the intrusion velocity curve and the intrusion displacement curve of the first B-pillar; the second simulation result includes: the intrusion velocity curve and the intrusion displacement curve of the second B-pillar; S5 includes: S51. Obtain the intrusion velocity curve and the intrusion displacement curve of the first B-pillar during the collision process generated by the target vehicle based on the complete side collision model of the vehicle, and obtain the intrusion velocity curve and the intrusion displacement curve of the second B-pillar during the collision process generated by the target vehicle based on the simplified side collision model of the vehicle. S52. Determine whether the difference between the first intrusion velocity peak value in the first B-pillar intrusion velocity curve and the second intrusion velocity peak value in the second B-pillar intrusion velocity curve is less than a first threshold, and obtain a first determination result; determine whether the changing trend of the first B-pillar intrusion velocity curve is the same as the changing trend of the second B-pillar intrusion velocity curve, and obtain a second determination result; determine whether the difference between the first displacement peak value in the first B-pillar intrusion displacement curve and the second displacement peak value in the second B-pillar intrusion displacement curve is less than a second threshold, and obtain a third determination result; determine whether the changing trend of the first B-pillar intrusion displacement curve is the same as the changing trend of the second B-pillar intrusion displacement curve, and obtain a fourth determination result; S53. When the first judgment result is negative, or the second judgment result is negative, or the third judgment result is negative, or the fourth judgment result is negative, adjust the division ratio of the original collision deformation part and the original non-collision deformation part, and return to execute S1 until the first judgment result is positive, the second judgment result is positive, the third judgment result is positive, and the fourth judgment result is positive, and the optimized simplified collision model of the car side is obtained.

2. The simplified modeling method for vehicle side collisions according to claim 1, characterized in that, The step of connecting the target mass point to the original collision deformation portion and the non-collision side of the car tire includes: Based on a rigid connection method, the target mass point is connected to the original collision deformation part and the car tire on the non-collision side, respectively.

3. A simplified modeling system for vehicle side collisions, characterized in that, include: The module consists of an acquisition module, a first processing module, a second processing module, and a generation module. The acquisition module is used to: when the moving barrier collides with the side of the target vehicle, acquire the first whole vehicle model of the target vehicle after the collision, and divide the first whole vehicle model into the original collision deformation part on the collision side and the original non-collision deformation part on the non-collision side. The first processing module is used to: based on the structure of the target vehicle, divide the original non-collision deformed part into a preset simplified vehicle part and the vehicle tire on the non-collision side, and obtain the centroid position of the preset simplified vehicle part; The second processing module is used to: construct a target mass point at the center of mass position with the same mass as the preset simplified car part, and connect the target mass point to the original collision deformation part and the car tire on the non-collision side respectively to obtain a simplified car model of the target car; The generation module is used to: generate a simplified side collision model of the target vehicle when it collides with the moving barrier on the side, based on the simplified vehicle model and the moving barrier; It also includes: an optimization module; The optimization module is used to: iteratively optimize the simplified side collision model of the vehicle based on the first simulation result of the target vehicle during the collision process generated by the complete side collision model of the vehicle and the second simulation result of the target vehicle during the collision process generated by the simplified side collision model of the vehicle, until the preset optimization conditions are met, and obtain the optimized simplified side collision model of the vehicle. The first simulation results include: the intrusion velocity curve and the intrusion displacement curve of the first B-pillar; the second simulation results include: the intrusion velocity curve and the intrusion displacement curve of the second B-pillar; the optimization module includes: a first optimization module, a second optimization module, and a third optimization module; The first optimization module is used to: obtain the first B-pillar intrusion speed curve and the first B-pillar intrusion displacement curve during the collision process generated by the target vehicle based on the complete side collision model of the vehicle, and obtain the second B-pillar intrusion speed curve and the second B-pillar intrusion displacement curve during the collision process generated by the target vehicle based on the simplified side collision model of the vehicle. The second optimization module is used to: determine whether the difference between the first intrusion velocity peak value in the first B-pillar intrusion velocity curve and the second intrusion velocity peak value in the second B-pillar intrusion velocity curve is less than a first threshold, and obtain a first determination result; determine whether the changing trend of the first B-pillar intrusion velocity curve is the same as the changing trend of the second B-pillar intrusion velocity curve, and obtain a second determination result; determine whether the difference between the first displacement peak value in the first B-pillar intrusion displacement curve and the second displacement peak value in the second B-pillar intrusion displacement curve is less than a second threshold, and obtain a third determination result; determine whether the changing trend of the first B-pillar intrusion displacement curve is the same as the changing trend of the second B-pillar intrusion displacement curve, and obtain a fourth determination result; The third optimization module is used to: adjust the division ratio of the original collision deformation part and the original non-collision deformation part when the first judgment result is negative, the second judgment result is negative, the third judgment result is negative, or the fourth judgment result is negative, and return to call the acquisition module until the first judgment result is positive, the second judgment result is positive, the third judgment result is positive, and the fourth judgment result is positive, so as to obtain the optimized simplified collision model of the car side.

4. The simplified modeling system for vehicle side collisions according to claim 3, characterized in that, The second processing module is specifically used for: Based on a rigid connection method, the target mass point is connected to the original collision deformation part and the car tire on the non-collision side, respectively.

5. A storage medium, characterized in that, The storage medium stores instructions that, when read by a computer, cause the computer to execute the simplified modeling method for vehicle side collisions as described in claim 1 or 2.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it causes the computer to execute the simplified modeling method for vehicle side collisions as described in claim 1 or 2.

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