Automobile high-voltage wire harness fracture risk assessment method and device based on wire harness refinement simulation and electronic equipment
By refining the high-voltage wire harness and evaluating the strain rate of each line layer in vehicle collision simulation, the problem of single stiffness of high-voltage wire harness simulation in the existing technology is solved, and the accurate judgment of the risk of fracture failure is achieved, and the accuracy of vehicle collision simulation is improved.
Patent Information
- Application Number
- CN202411919900.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-04-22
AI Technical Summary
The prior art has a single stiffness problem when simulating a high-voltage wire harness of automobiles, which cannot accurately simulate the specific damage details of the high-voltage wire harness in collisions, and cannot effectively identify the failure situation during collisions.
By disassembling the high-voltage wire harness into an outer insulation layer, a braided layer, an inner insulation layer and an inner conductor layer, and simulations are performed separately in the form of a finite element grid to connect it to the target high-voltage wire harness. In vehicle collision simulation, based on the preset strain threshold, each line layer is compared and the risk of fracture failure is evaluated.
It realizes accurate judgment of the risk of fracture failure of high-voltage wiring harness in collisions, and improves the accuracy of vehicle collision simulation and the efficiency of optimization and improvement.
Smart Images
Figure CN119862737A_ABST
Abstract
Description
[Technical field]
[0001] The embodiments of the present application relate to the technical field of automobile collision performance development, and in particular to a method, device and electronic equipment for evaluating the risk of automobile high-voltage wire harness fracture based on wire harness refinement simulation. [Background technology]
[0002] In the development of traditional vehicle collision safety performance, the following two methods are usually used to simulate high-voltage wire harnesses: (1) extracting the middle layer of the high-voltage wire harness geometric model, dividing the middle layer into grid units with an average size of 5 mm, and assigning the actual thickness and material with a single stiffness; (2) directly dividing the surface of the high-voltage wire harness into grid units with an average size of 5 mm, assigning nullshell material, connecting each circle of grid nodes with rigid units, and connecting adjacent rigid units with a No. 1 beam unit, where the diameter of the beam is half the diameter of the wire harness, and the material is assigned copper material (single stiffness).
[0003] After practical analysis, the above two commonly used methods both have problems:
[0004] (1) The high-voltage wire harness simulation method that divides the mesh units on the geometric intermediate layer and assigns the actual thickness and material has the problem that the high-voltage wire harness simulation has only a single stiffness. However, after analysis, the present application believes that a high-voltage wire harness with a single stiffness cannot simulate the specific details of the high-voltage wire harness being damaged, and is not conducive to the development of the collision performance of the entire vehicle;
[0005] (2) The high-voltage wire harness simulation method directly divides the grid units on the surface of the high-voltage wire harness and uses the beam unit to simulate the inner core material. This method only simulates the physical properties of the wire harness, but cannot effectively identify whether failure occurs during a collision. In addition, there is also a single stiffness problem. [Summary of the invention]
[0006] The embodiments of the present application propose a method, device and electronic equipment for assessing the risk of automobile high-voltage wire harness fracture based on wire harness refinement simulation, which relates to the technical field of automobile collision performance development and can obtain more refined performance assessment conclusions that conform to actual wire harness conditions.
[0007] In a first aspect, an embodiment of the present application provides a method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation, the method comprising:
[0008] Predetermining a hierarchical structure of a target high-voltage wire harness to be simulated, the hierarchical structure comprising several combinations of the following wire layers: an outer insulating layer, a braided layer, an inner insulating layer, and an inner conductor layer;
[0009] Simulate each wire layer separately and connect them into the target high-voltage wire harness;
[0010] During the vehicle collision simulation, the fracture failure risk of the simulated target high-voltage wire harness is determined: based on several preset strain thresholds, the strain rates of each wire layer of the high-voltage wire harness are compared and judged.
[0011] In at least one possible implementation manner, the simulation method of the outer insulation layer and the inner insulation layer includes: using a single row of hexahedral grid units with preset parameters for simulation and assigning corresponding insulation materials and thickness values.
[0012] In at least one possible implementation manner, the simulation method of the inner conductor layer includes: using a hexahedral grid unit with preset parameters to perform simulation and assigning corresponding conductor materials and thickness values.
[0013] In at least one possible implementation manner, the method for simulating the braided layer includes: using shell grid units with preset parameters for simulation, and assigning corresponding metal materials and thickness values.
[0014] In at least one possible implementation manner, the simulation method of the woven layer further includes: setting a corresponding pore area based on a current shell grid unit.
[0015] In at least one possible implementation manner, when simulating a high-voltage wire harness, a wire harness bending area is set on a preset wire layer and a wear area is set on an outer insulating layer.
[0016] In at least one possible implementation manner, the braided layer is connected to the outer insulating layer and the inner insulating layer, and the inner conductor layer is connected to the inner insulating layer in a common node manner.
[0017] The technical role of this solution can be referenced as follows: the components of the high-voltage wire harness are specifically disassembled into an outer insulation layer, a braided layer, an inner insulation layer and an inner conductor layer, and each is simulated separately in the form of a finite element mesh. By the above simulation method, in the collision simulation model, when the high-voltage wire harness is squeezed or stretched, it is possible to analyze the strain rate of the corresponding wire layer of the high-voltage wire harness to confirm whether there is a risk of fracture and failure of the high-voltage wire harness in the collision. This application can be configured in the early stage of vehicle performance development, so that the risk of fracture and failure of the high-voltage wire harness in the vehicle collision simulation can be accurately judged in advance, thereby effectively improving the efficiency and effect of subsequent optimization and improvement.
[0018] In a second aspect, an embodiment of the present application provides a device for assessing the risk of high-voltage wiring harness fracture in an automobile based on wiring harness thinning simulation, the device comprising:
[0019] A wire harness subdivision module, used to predetermine a hierarchical structure of a target high-voltage wire harness to be simulated, wherein the hierarchical structure includes several combinations of the following wire layers: an outer insulating layer, a braided layer, an inner insulating layer, and an inner conductor layer;
[0020] The wiring harness simulation module is used to simulate each wiring layer separately and connect them into a target high-voltage wiring harness;
[0021] The failure simulation module is used to determine the fracture failure risk of the simulated target high-voltage wire harness during the vehicle collision simulation process: based on several preset strain thresholds, the strain rate of each wire layer of the high-voltage wire harness is compared and determined.
[0022] In a third aspect, an embodiment of the present application provides an electronic device, comprising: one or more processors, a memory, and one or more computer programs, wherein the memory may adopt a non-volatile storage medium, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, and when the instructions are executed by the device, the electronic device performs the method as described in the first aspect or any possible implementation manner of the first aspect.
[0023] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer-readable storage medium is run on a computer, the computer executes the method as described in the first aspect or any possible implementation of the first aspect.
[0024] It should be understood that the second to fourth aspects of the embodiments of the present application are consistent with the technical solutions of the first aspect of the embodiments of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here.
Brief Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 A schematic flow chart of a method for assessing the risk of high-voltage wiring harness fracture in an automobile based on wiring harness thinning simulation provided in an embodiment of the present application;
[0027] Figure 2 A schematic diagram of a layered simulation of a high-voltage wiring harness provided in an embodiment of the present application;
[0028] Figure 3A schematic diagram of the structure of a device for assessing the risk of high-voltage wiring harness fracture in an automobile based on wiring harness thinning simulation provided in an embodiment of the present application. [Specific implementation method]
[0029] In order to better understand the technical solution of this specification, the embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0030] It should be clear that the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.
[0031] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit this specification. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.
[0032] In view of the many deficiencies in the simulation of high-voltage wiring harnesses during the current development of automobile collision performance, an embodiment of the present application provides a method for assessing the risk of automobile high-voltage wiring harness fracture based on wiring harness refinement simulation, in which the components of the high-voltage wiring harness are specifically disassembled into an outer insulation layer, a braided layer, an inner insulation layer, and an inner conductor layer, and are simulated separately in the form of a finite element mesh. By the above simulation method, in the collision simulation model, when the high-voltage wiring harness is squeezed or stretched, it is possible to analyze the strain rate of the corresponding wire layer of the high-voltage wiring harness to confirm whether there is a risk of fracture and failure of the high-voltage wiring harness in the collision. The present application can be configured in the early stage of vehicle performance development, so that the risk of fracture and failure of the high-voltage wiring harness in the vehicle collision simulation can be accurately judged in advance, thereby effectively improving the efficiency and effect of subsequent optimization and improvement.
[0033] The technical solution protected by the embodiments of the present application is described in detail below with reference to the accompanying drawings.
[0034] See also Figure 1 , is a flow chart of a method for assessing the risk of high-voltage wiring harness fracture in an automobile based on wiring harness thinning simulation provided by an embodiment of the present application. The flow of the method is described as follows:
[0035] Step S1, predetermining a hierarchical structure of a target high-voltage wire harness to be simulated, wherein the hierarchical structure includes several combinations of the following wire layers: an outer insulating layer, a braided layer, an inner insulating layer, and an inner conductor layer;
[0036] Step S2, simulating each line layer respectively and connecting them into a target high-voltage line harness;
[0037] Here combined Figure 2 The simulation method and connection method of each wire layer in a type of high-voltage wire harness containing the above four layers are schematically introduced:
[0038] (1) The outer insulating layer (i.e., the outer rubber layer in the figure) is usually made of polyvinyl chloride, which is easily scratched when subjected to transverse shear, exposing the copper wire inside the wiring harness. Once this part touches the vehicle body, a short circuit to the ground may occur. Therefore, the outer insulating layer is preferably simulated by a single row of hexahedral grid units with an average of 5 mm (not limited) and assigned with rubber material, and the thickness adopts the actual thickness.
[0039] (2) The braided layer is also called the shielding layer, which is a conductive metal layer mainly used for electromagnetic shielding and grounding protection. Therefore, the braided layer is preferably simulated using an average shell grid unit of 5 mm (not limited), and is connected to the outer insulating layer in a common node manner to give it actual material and thickness. In addition, the braided layer usually has a number of pores, so in some preferred embodiments, by adding another shell grid unit with a smaller thickness and smaller grid parameters to the current shell grid unit, the two can be superimposed (such as using a common node connection) as a whole as a simulation result that conforms to the actual structure of the braided layer; of course, this application does not exclude the use of other simulation model units or the adjustment of simulation unit parameters to obtain simulation results of the pore area of the braided layer.
[0040] (3) The inner insulating layer and the outer insulating layer (that is, the inner rubber layer in the figure) are preferably simulated by using a single row of hexahedral grid units with an average size of 5 mm (not limited) and given a rubber material, and the thickness is the actual thickness; and similarly, they can be connected to the braided layer by a common node method.
[0041] (4) The inner conductor layer is generally made of twisted copper strands (the copper conductor layer shown in the figure), and is preferably simulated using an average hexahedral grid unit of 5 mm (not limited) and given a copper material and corresponding thickness; and similarly, it is connected to the inner insulation layer using a common node method.
[0042] Those skilled in the art can understand that the concept of the present application is to conduct detailed simulation in combination with a real high-voltage wire harness, that is, to conduct separate simulations on multiple component wire layers of the high-voltage wire harness. Therefore, in this way, a simulation that is closer to the real wire harness situation can also be performed, such as the wire harness bending area that may be generated by actual wiring (the bending degree, bending marks, and bending forces of different wire layers may all be different), or the wear (damage) of the outer insulation layer in the real environment. These factors may affect the judgment of whether the high-voltage wire harness is broken during subsequent collision simulation. Therefore, in other preferred embodiments of the present application, it is proposed that when simulating the high-voltage wire harness, a wire harness bending area can be set on a preset wire layer and a wear area can be set on the outer insulation layer.
[0043] Continuing from the above, step S3, during the vehicle collision simulation, a fracture failure risk determination is performed on the simulated target high-voltage wire harness.
[0044] Since the present application has carried out a detailed layered simulation of the high-voltage wiring harness, it is not ruled out that in the collision simulation model, the strain values of each component (wire layer) of the high-voltage wiring harness can be separately confirmed. For example, if the strain value of the inner conductor layer of a certain high-voltage wiring harness is greater than 0.6 (the breaking strain of the copper stranded wire is usually 0.6, and it is easy to break under tension), it means that there is a risk of fracture failure in this part; and if the maximum strain of the inner conductor layer of the copper stranded wire of a certain high-voltage wiring harness is 0.2551 (not exceeding 0.6), then the risk of fracture failure of the high-voltage wiring harness in the event of a vehicle collision is relatively small.
[0045] See also Figure 3 Based on the same inventive concept, the embodiment of the present application also provides a device for assessing the risk of high-voltage wiring harness fracture of an automobile based on wiring harness thinning simulation, the device comprising:
[0046] The wire harness subdivision module 301 is used to predetermine the hierarchical structure of the target high-voltage wire harness to be simulated, wherein the hierarchical structure includes several combinations of the following wire layers: an outer insulating layer, a braided layer, an inner insulating layer, and an inner conductor layer;
[0047] A wire harness simulation module 302 is used to simulate each wire layer separately and connect them into a target high-voltage wire harness;
[0048] The failure simulation module 303 is used to determine the fracture failure risk of the simulated target high-voltage wire harness during the vehicle collision simulation process: based on a plurality of preset strain thresholds, the strain rate of each wire layer of the high-voltage wire harness is compared and determined.
[0049] Based on the same inventive concept, the embodiment of the present application also provides an electronic device, including at least one processor, the processor is used to execute a computer program stored in a memory, and implement the flowchart steps of the above-mentioned automobile high-voltage wire harness fracture risk assessment method based on wire harness thinning simulation provided in the embodiment of the present application. Preferably, the electronic device can be a computing terminal configured with a simulation test system.
[0050] Optionally, the processor may specifically be a central processing unit, a specific ASIC, or one or more integrated circuits for controlling program execution.
[0051] Optionally, the electronic device may further include a memory connected to at least one processor, and the memory may include ROM, RAM, and disk storage. The memory is used to store data required by the processor when it is running, that is, it stores instructions that can be executed by at least one processor, and at least one processor executes the methods mentioned in the above embodiments by executing the instructions stored in the memory. Among them, the number of memories is one or more. Among them, the number of memories is one or more.
[0052] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores computer instructions. When the computer instructions are executed on a computer, the computer executes the methods mentioned in the above embodiments.
[0053] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this specification should be included in the scope of protection of this specification.
Claims
1. A method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation, characterized in that: The method comprises: Predetermining a hierarchical structure of a target high-voltage wire harness to be simulated, the hierarchical structure comprising several combinations of the following wire layers: an outer insulating layer, a braided layer, an inner insulating layer, and an inner conductor layer; Simulate each wire layer separately and connect them into the target high-voltage wire harness; During the vehicle collision simulation, the fracture failure risk of the simulated target high-voltage wire harness is determined: based on several preset strain thresholds, the strain rates of each wire layer of the high-voltage wire harness are compared and judged.
2. The method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation according to claim 1 is characterized in that: The simulation method for the outer insulating layer and the inner insulating layer includes: using a single row of hexahedral grid units with preset parameters for simulation and assigning corresponding insulating materials and thickness values.
3. The method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation according to claim 1 is characterized in that: The simulation method of the inner conductor layer includes: using a hexahedral grid unit with preset parameters to simulate and assigning corresponding conductor materials and thickness values.
4. The method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation according to claim 1 is characterized in that: The simulation method of the braided layer includes: using shell grid units with preset parameters for simulation, and assigning corresponding metal materials and thickness values.
5. The method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation according to claim 4 is characterized in that: The simulation method for the braided layer also includes: setting a corresponding pore area based on the current shell grid unit.
6. The method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation according to claim 1 is characterized in that: When simulating a high-voltage wire harness, a wire harness bending area is set on a preset wire layer and a wear area is set on an outer insulation layer.
7. The method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation according to any one of claims 1 to 6, characterized in that: The braided layer is respectively connected to the outer insulating layer and the inner insulating layer, and the inner conductor layer is connected to the inner insulating layer in a common node manner.
8. A device for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation, characterized in that: The device comprises: A wire harness subdivision module, used to predetermine a hierarchical structure of a target high-voltage wire harness to be simulated, wherein the hierarchical structure includes several combinations of the following wire layers: an outer insulating layer, a braided layer, an inner insulating layer, and an inner conductor layer; The wiring harness simulation module is used to simulate each wiring layer separately and connect them into a target high-voltage wiring harness; The failure simulation module is used to determine the fracture failure risk of the simulated target high-voltage wire harness during the vehicle collision simulation process: based on several preset strain thresholds, the strain rate of each wire layer of the high-voltage wire harness is compared and determined.
9. An electronic device, characterized in that: include: One or more processors, a memory and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the electronic device, enable the electronic device to execute the automotive high-voltage wire harness fracture risk assessment method based on wire harness thinning simulation as described in any one of claims 1 to 7.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for assessing the risk of automobile high-voltage wire harness fracture based on wire harness thinning simulation as described in any one of claims 1 to 7 is implemented.