Vehicle door stiffness value target setting method based on vehicle door external opening control in high-speed wind load

Abstract

The invention discloses a vehicle door rigidity value target setting method based on high-speed wind load vehicle door external opening control, and relates to the field of simulation testing, and the method comprises the steps: S1, sealing strip material characteristic analysis: obtaining sealing strip mechanical characteristic parameters through material level testing, model fitting and finite element simulation; s2, test verification and parameter correction: through comparison between a compression load deformation test and a simulation result, iteratively correcting material parameters of the sealing strip; s3, wind load calculation is conducted, specifically, vehicle door wind pressure distribution at different wind speeds and yaw angles is output through whole vehicle CFD simulation; s4, vehicle door deformation simulation analysis: establishing a vehicle door finite element model, mapping a wind pressure load, and calculating vehicle door deformation and a maximum extension position; s5, real vehicle verification and model correction: actually measuring the actual external tensor of the vehicle door, performing benchmarking with a simulation result, and correcting the model; and S6, defining a vehicle door system rigidity value target: respectively determining a sealing strip rigidity upper limit and a vehicle door rigidity lower limit, and completing rigidity value target setting.

Description

Technical Field

[0001] This application relates to the field of simulation testing, and in particular to a method for setting the target value of door stiffness based on door outward flaring control under high-speed wind load, a system for setting the target value of door stiffness based on door outward flaring control under high-speed wind load, electronic equipment, storage media and simulation testing platform. Background Technology

[0002] In the field of automotive design and manufacturing, the door system, as a key component of the vehicle body, directly affects the vehicle's safety, sealing, and ride comfort when its stiffness target is set. Traditional door system stiffness target settings only focus on the reliability of door opening and closing, with the core requirement being to prevent door deformation or sagging from causing opening and closing failures. This approach does not consider the dynamic operating conditions of the vehicle during actual road driving, resulting in significant design limitations.

[0003] During high-speed driving, vehicles are continuously subjected to wind loads generated by airflow, which can cause the doors to tend to open outwards (i.e., the doors flare outwards). If the overall rigidity of the door system is too low, especially if the sheet metal around the corners of the door seals is not sufficiently rigid, the risk of the doors flaring outwards will increase significantly under the negative pressure created by high-speed wind loads. When the outward flare reaches a certain threshold, the door seals may become overstretched or displaced and detach from the sealing area, directly causing the sealing function to fail. This can lead to problems such as rainwater leakage, increased wind noise at high speeds, and unstable air pressure inside the vehicle. In severe cases, it may even damage the structural stability of the door and threaten driving safety.

[0004] Furthermore, the stiffness characteristics of the door sealing strip itself (e.g., with compression reaction force as the core indicator) also have a crucial impact on the outward expansion of the door. If the compression reaction force of the sealing strip is too large, even when the vehicle is statically parked or moving at low speed, it will exert a continuous outward pushing force on the door. When combined with the dynamic outward expansion load of high-speed wind load, it will further aggravate the outward expansion of the door, resulting in a double decrease in the sealing performance and structural safety of the door system.

[0005] Currently, the industry lacks a systematic scheme for setting door stiffness targets that integrates "material properties, simulation analysis, real vehicle verification, and risk control." This makes it impossible to accurately quantify the relationship between high-speed wind load, sealing strip stiffness, and door outward expansion. As a result, door stiffness design is either overly redundant (e.g., increasing vehicle weight and manufacturing costs) or insufficient (e.g., failing to meet performance requirements under high-speed driving).

[0006] Therefore, there is an urgent need for a method for setting the target stiffness value of the door system based on the outward expansion control of the door under high-speed wind load, in order to fill the gap in traditional design, achieve accurate and efficient design of door stiffness, and ensure the performance and safety of the vehicle under all working conditions. Summary of the Invention

[0007] The purpose of this invention is to provide a method for setting a target door stiffness value based on door outward flaring control under high-speed wind load, a system for setting a target door stiffness value based on door outward flaring control under high-speed wind load, an electronic device, a storage medium, and a simulation test platform, thereby solving at least one of a number of technical problems.

[0008] 1. Traditional door stiffness targets only focus on opening and closing reliability, without covering dynamic conditions under high-speed wind loads. This can lead to doors being prone to outward expansion due to insufficient stiffness during high-speed driving, resulting in problems such as sealing strip failure, increased wind noise, and rainwater leakage, thus failing to meet the needs of vehicles under all operating conditions.

[0009] 2. The existing design does not establish a correlation control mechanism between the stiffness (compression reaction force) of the sealing strip and the outward expansion of the door. When the compression reaction force of the sealing strip is too large, the static thrust superimposed with the dynamic load of high-speed wind load will further aggravate the risk of the door expanding outward. There is a lack of precise control standards for the stiffness of the sealing strip.

[0010] 3. The industry lacks an integrated stiffness value setting scheme that combines "material properties, simulation analysis, real vehicle verification, and risk control," making it impossible to quantify the relationship between high-speed wind load, sealing strip stiffness, and door outward expansion. This results in door stiffness design either being too redundant, increasing cost and weight, or insufficiently redundant, leading to substandard performance and low design efficiency and accuracy.

[0011] 4. Traditional solutions lack real-time risk control measures for door flare, and cannot dynamically adjust the vehicle status based on vehicle driving data (such as vehicle speed and yaw angle) and environmental parameters (such as wind force and wind direction), making it difficult to cope with sudden door flare risks under complex road conditions and posing safety hazards.

[0012] This invention provides the following solution:

[0013] According to a first aspect of the present invention, a method for setting a target door stiffness value based on door outward tension control under high-speed wind load is provided, comprising:

[0014] Step S1, Analysis of sealing strip material properties: Obtain the mechanical property parameters of the sealing strip through material-level testing, model fitting and finite element simulation;

[0015] Step S2, Experimental Verification and Parameter Correction: By comparing the results of compression load deformation tests and simulations, the material parameters of the sealing strip are iteratively corrected.

[0016] Step S3, wind load calculation: Through whole vehicle CFD simulation, output the door wind pressure distribution under different wind speeds and yaw angles;

[0017] Step S4, Door Deformation Simulation Analysis: Establish a finite element model of the door and map the wind pressure load, calculate the door deformation and the maximum outward expansion position;

[0018] Step S5, Real-vehicle verification and model correction: Measure the actual external tensor of the car door, compare it with the simulation results, and correct the model until the model accuracy is ≥90%;

[0019] Step S6, Define the target stiffness value of the door system: Based on the simulation model after the target is met, determine the upper limit of the stiffness of the sealing strip and the lower limit of the stiffness of the door respectively, and complete the stiffness value target setting.

[0020] Further, step S1, the analysis of the sealing strip material properties includes:

[0021] Conduct uniaxial tensile tests on the sealing strip material to obtain the stress-strain relationship of the material;

[0022] The experimental data were fitted using a third-order Ogden elastic model to obtain the fitting parameters of the sponge adhesive and solid adhesive for the door strip and door opening strip.

[0023] A finite element model of the sealing strip was established using Hypermesh and imported into ABAQUS software to perform compression simulation of CLD compression load deformation, outputting the stiffness values ​​of the sealing strip under different compression amounts.

[0024] Furthermore, step S2, experimental verification and parameter correction, includes:

[0025] Design specialized tooling;

[0026] Using specialized tooling, a high and low temperature tensile testing machine was used to conduct a CLD compression test on the sealing strip to obtain the actual stiffness value under static compression.

[0027] Compare the measured stiffness value with the stiffness value output in step S1;

[0028] By iteratively correcting the sealing strip material parameters based on the differences, the consistency between simulation and experiment can be improved.

[0029] Furthermore, step S3, wind load calculation, includes:

[0030] A CFD simulation model of the entire vehicle was created using Star-CCM+ software.

[0031] The simulation parameters cover wind speeds of 80~120km / h and yaw angles of ±20°~0°.

[0032] Output the door wind pressure distribution data under various parameter combinations.

[0033] Further, step S4, the door deformation simulation analysis includes:

[0034] A finite element model of the car door, including BUSH elements, was created using Hypermesh to simulate the nonlinear stiffness characteristics of the sealing strip.

[0035] Map the door wind pressure distribution data output in step S3, including the wind pressure load under the CFD simulation model, to the door model.

[0036] The deformation of the car door was calculated using NASTRAN software to determine the maximum outward expansion position and the predicted displacement value of the door.

[0037] Furthermore, step S5, real-vehicle verification and model correction, includes:

[0038] Using a dynamic gap meter, the maximum outward opening position and actual outward opening amount of the door were measured under high-speed driving conditions, covering the maximum vehicle speed and different yaw angles.

[0039] Compare the measured values ​​with the displacement prediction values ​​in step S4, and repeatedly revise the simulation model until the preset accuracy is met.

[0040] According to a second aspect of the present invention, a door stiffness target setting system based on door outward tension control under high-speed wind load is provided, comprising:

[0041] The sealing strip material property analysis module is used to obtain the mechanical property parameters of the sealing strip through material-level testing, model fitting, and finite element simulation.

[0042] The experimental verification and parameter correction module is used to iteratively correct the sealing strip material parameters by comparing the results of compression load deformation tests and simulations.

[0043] The wind load calculation module is used to output the door wind pressure distribution under different wind speeds and yaw angles through whole vehicle CFD simulation;

[0044] The door deformation simulation analysis module is used to establish a finite element model of the door and map wind pressure loads to calculate the door deformation and the maximum outward expansion position.

[0045] The real-vehicle verification and model correction module is used to measure the actual external tensile of the car door, compare it with the simulation results, and correct the model until the model accuracy is ≥90%.

[0046] The door system stiffness target definition module is used to determine the upper limit of the sealing strip stiffness and the lower limit of the door stiffness based on the simulation model after the target is met, thus completing the stiffness target setting.

[0047] According to a third aspect of the present invention, an electronic device is provided, comprising: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0048] The memory stores a computer program, which, when executed by the processor, causes the processor to perform steps such as the method for setting the target stiffness value of a car door based on the outward flaring control of a car door under high-speed wind load.

[0049] According to a fourth aspect of the present invention, a computer-readable storage medium is provided storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform steps such as a method for setting a target door stiffness value based on door outward flaring control under high-speed wind load.

[0050] According to a fifth aspect of the present invention, a simulation testing platform is provided, comprising:

[0051] Electronic equipment for implementing steps such as a method for setting a target door stiffness value based on door outward flaring control under high-speed wind load;

[0052] The processor runs a program, and when the program runs, it executes steps such as a method for setting the target value of door stiffness based on door outward flaring control under high-speed wind load, based on data output from electronic devices.

[0053] Storage medium for storing programs that, when running, execute steps such as a method for setting a target door stiffness value based on door outward tension control under high-speed wind load, in response to data output from electronic devices.

[0054] The above solution achieves the following beneficial technical effects:

[0055] This application incorporates high-speed wind load dynamic conditions into the core consideration of door stiffness target setting, and combines it with the coordinated control of sealing strip stiffness. This solves the limitation of traditional designs that only focus on opening and closing reliability, ensuring that the door can maintain stable performance under all operating conditions such as low speed, high speed, and static conditions, and effectively avoiding problems such as sealing strip failure, wind noise leakage, etc.

[0056] This application employs a closed-loop process of "material-level testing → multi-software simulation → real-vehicle verification" to accurately quantify the relationship between high-speed wind load, sealing strip stiffness, and door outward expansion. It can clearly define the upper limit of sealing strip stiffness (outward expansion ≤ 0.1mm) and the lower limit of door stiffness, avoiding redundancy (reducing vehicle weight by 5%-8%) or insufficiency in stiffness design, reducing manufacturing costs while ensuring performance compliance.

[0057] This application significantly improves the accuracy of stiffness design and simulation results by iteratively correcting the sealing strip material parameters (test and simulation comparison verification) and by benchmarking the car door simulation model against the real vehicle (accuracy ≥90%), thereby reducing the number of real vehicle tests and shortening the development cycle of the car door system by 15%-20%.

[0058] This application introduces a new mechanism for assessing and responding to outward flaring risks based on real-time data (vehicle speed, wind direction, etc.) and MAP maps. This mechanism can dynamically limit vehicle speed, reset navigation routes, and proactively avoid the risk of outward flaring of vehicle doors, thereby further enhancing the structural safety and driving stability of vehicles at high speeds. Attached Figure Description

[0059] Figure 1 This is a flowchart of a method for setting a target door stiffness value based on door outward tension control under high-speed wind load, provided by one or more embodiments of the present invention.

[0060] Figure 2 This is a structural diagram of a door stiffness target setting system based on door outward tension control under high-speed wind load, provided by one or more embodiments of the present invention.

[0061] Figure 3 This is a schematic diagram of a door stiffness target setting strategy based on door outward flaring control under high-speed wind load, provided by a specific embodiment of the present invention.

[0062] Figure 4 This is a schematic diagram of a dumbbell-shaped sample of a door opening strip for uniaxial tensile testing provided in a specific embodiment of the present invention.

[0063] Figure 5 This is a schematic diagram of the fitting results of the constitutive parameters of the door opening strip solid adhesive provided in a specific embodiment of the present invention.

[0064] Figure 6 This is a schematic diagram of the compression cross-section of a door opening sealing strip provided in a specific embodiment of the present invention.

[0065] Figure 7 This is a specific embodiment of the door opening sealing strip compression load testing fixture provided by the present invention.

[0066] A schematic diagram.

[0067] Figure 8 This is a schematic diagram of the wind pressure cloud map of a car door provided in a specific embodiment of the present invention.

[0068] Figure 9 This is a CAE analysis model for the outward expansion of a car door provided in a specific embodiment of the present invention.

[0069] A schematic diagram.

[0070] Figure 10 This is a schematic diagram of a CAE analysis model for the outward expansion of a car door provided in a specific embodiment of the present invention.

[0071] Figure 11 This is a block diagram of an electronic device for setting a target stiffness value of a vehicle door based on the outward expansion control of the vehicle door under high-speed wind load, provided by one or more embodiments of the present invention. Detailed Implementation

[0072] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0073] Figure 1 This is a flowchart of a method for setting a target door stiffness value based on door outward tension control under high-speed wind load, provided by one or more embodiments of the present invention.

[0074] like Figure 1 The method for setting the target door stiffness value based on door outward tension control under high-speed wind load, as shown, includes:

[0075] Step S1, Analysis of sealing strip material properties: Obtain the mechanical property parameters of the sealing strip through material-level testing, model fitting and finite element simulation;

[0076] Step S2, Experimental Verification and Parameter Correction: By comparing the results of compression load deformation tests and simulations, the material parameters of the sealing strip are iteratively corrected.

[0077] Step S3, wind load calculation: Through whole vehicle CFD simulation, output the door wind pressure distribution under different wind speeds and yaw angles;

[0078] Step S4, Door Deformation Simulation Analysis: Establish a finite element model of the door and map the wind pressure load, calculate the door deformation and the maximum outward expansion position;

[0079] Step S5, Real-vehicle verification and model correction: Measure the actual external tensor of the car door, compare it with the simulation results, and correct the model until the model accuracy is ≥90%;

[0080] Step S6, Define the target stiffness value of the door system: Based on the simulation model after the target is met, determine the upper limit of the stiffness of the sealing strip and the lower limit of the stiffness of the door respectively, and complete the stiffness value target setting.

[0081] In this embodiment, step S1, the analysis of the sealing strip material properties, includes:

[0082] Conduct uniaxial tensile tests on the sealing strip material to obtain the stress-strain relationship of the material;

[0083] The experimental data were fitted using a third-order Ogden elastic model to obtain the fitting parameters of the sponge adhesive and solid adhesive for the door strip and door opening strip.

[0084] A finite element model of the sealing strip was established using Hypermesh and imported into ABAQUS software to perform compression simulation of CLD compression load deformation, outputting the stiffness values ​​of the sealing strip under different compression amounts.

[0085] In this embodiment, step S2, experimental verification and parameter correction, includes:

[0086] Design specialized tooling;

[0087] Using specialized tooling, a high and low temperature tensile testing machine was used to conduct a CLD compression test on the sealing strip to obtain the actual stiffness value under static compression.

[0088] Compare the measured stiffness value with the stiffness value output in step S1;

[0089] By iteratively correcting the sealing strip material parameters based on the differences, the consistency between simulation and experiment can be improved.

[0090] In this embodiment, step S3, wind load calculation, includes:

[0091] A CFD simulation model of the entire vehicle was created using Star-CCM+ software.

[0092] The simulation parameters cover wind speeds of 80~120km / h and yaw angles of ±20°~0°.

[0093] Output the door wind pressure distribution data under various parameter combinations.

[0094] In this embodiment, step S4, the door deformation simulation analysis, includes:

[0095] A finite element model of the car door, including BUSH elements, was created using Hypermesh to simulate the nonlinear stiffness characteristics of the sealing strip.

[0096] Map the door wind pressure distribution data output in step S3, including the wind pressure load under the CFD simulation model, to the door model.

[0097] The deformation of the car door was calculated using NASTRAN software to determine the maximum outward expansion position and the predicted displacement value of the door.

[0098] In this embodiment, step S5, real vehicle verification and model correction, includes:

[0099] Using a dynamic gap meter, the maximum outward opening position and actual outward opening amount of the door were measured under high-speed driving conditions, covering the maximum vehicle speed and different yaw angles.

[0100] Compare the measured values ​​with the displacement prediction values ​​in step S4, and repeatedly revise the simulation model until the preset accuracy is met.

[0101] In this embodiment, the stiffness value target definition in step S6 includes:

[0102] Determine the upper limit of the sealing strip stiffness:

[0103] With the constraint that the external tension of the door caused by the sealing strip under static conditions is ≤0.1mm, the upper limit of the static stiffness of the door opening sealing strip and the door sealing strip is determined.

[0104] Determine the lower limit of door stiffness:

[0105] Based on the measured maximum outward opening position and amount of the door in step S5, the door stiffness value under the outward opening condition is calculated using a preset door CAE model with qualified accuracy, and is set as the lower limit of door stiffness.

[0106] In this embodiment, it also includes: step S7, real-time outward opening risk control of the car door;

[0107] Step S7, real-time outward opening risk control of the car door includes:

[0108] Step S71: Obtain real-time vehicle driving data (including at least vehicle speed, driving direction, and road deviation direction) and external environmental parameters (including at least wind force and wind direction).

[0109] Step S72: Based on the parameters obtained in step S71, query the preset MAP diagram (e.g., obtained in the actual vehicle test calibration in step S5) to determine the real-time outward tension of the door.

[0110] Step S73: Compare the real-time outward tension obtained in step S72 with the stiffness target set in step S6 to determine whether there is a risk of outward tension in the door.

[0111] Step S74: If step S73 determines that there is a risk, the optimized vehicle speed and optimized driving direction are determined through the MAP map, the vehicle speed is limited to the preset range of the optimized vehicle speed, and the navigation route is reset in combination with the driving direction, road deviation direction and expected wind direction changes.

[0112] Figure 2 This is a structural diagram of a door stiffness target setting system based on door outward tension control under high-speed wind load, provided by one or more embodiments of the present invention.

[0113] like Figure 2 The door stiffness target setting system based on door outward tension control under high-speed wind load shown includes: sealing strip material property analysis module, test verification and parameter correction module, wind load calculation module, door deformation simulation analysis module, real vehicle verification and model correction module, and door system stiffness target definition module;

[0114] The sealing strip material property analysis module is used to obtain the mechanical property parameters of the sealing strip through material-level testing, model fitting, and finite element simulation.

[0115] The experimental verification and parameter correction module is used to iteratively correct the sealing strip material parameters by comparing the results of compression load deformation tests and simulations.

[0116] The wind load calculation module is used to output the door wind pressure distribution under different wind speeds and yaw angles through whole vehicle CFD simulation;

[0117] The door deformation simulation analysis module is used to establish a finite element model of the door and map wind pressure loads to calculate the door deformation and the maximum outward expansion position.

[0118] The real-vehicle verification and model correction module is used to measure the actual external tensile of the car door, compare it with the simulation results, and correct the model until the model accuracy is ≥90%.

[0119] The door system stiffness target definition module is used to determine the upper limit of the sealing strip stiffness and the lower limit of the door stiffness based on the simulation model after the target is met, thus completing the stiffness target setting.

[0120] It is worth noting that although this system / device only discloses the above-mentioned modules / units, it does not mean that this system / device is limited to the above-mentioned basic functional modules / units. On the contrary, what this invention intends to express is that, based on the above-mentioned basic functional modules, those skilled in the art can add one or more functional modules in combination with the prior art to form an infinite number of embodiments or technical solutions. That is to say, this system is open rather than closed. It cannot be assumed that the scope of protection of the claims of this invention is limited to the above-disclosed basic functional modules just because this embodiment only discloses a few basic functional modules.

[0121] In one specific embodiment, a target setting strategy for the stiffness value of a door system based on door outward flaring control under high-speed wind load is disclosed, such as... Figure 3 As shown, it includes:

[0122] Step 1 (Step 1): Analysis of sealing strip material properties: 1. Material-level uniaxial tensile test; 2. Parameter fitting of 3rd order Ogden model; 3. Establishment of finite element model of sealing strip using Hypermesh; 4. CLD compression simulation using ABAQUS.

[0123] Step 2: Experimental verification and parameter correction: 1. Design tooling to conduct CLD compression tests; 2. Compare experimental and simulation stiffness values; 3. Iteratively correct material parameters.

[0124] Step 3: Wind load calculation: Star-CCM + whole vehicle CFD simulation, outputting door wind pressure distribution under different wind speeds / yaw angles.

[0125] Step 4: Door Deformation Simulation Analysis: 1. Create a door model with BUSH elements using Hypermesh; 2. Map CFD wind pressure loads; 3. Calculate door deformation using NASTRAN; output the maximum outward expansion position and displacement prediction value.

[0126] Step 5: Real-vehicle verification and model correction: 1. Measure the external tensor using a dynamic gap gauge; 2. Compare and verify with simulation results; 3. Iterate and correct the model until the accuracy is ≥90%.

[0127] Step 6: Target value definition and verification: Stiffness target system, 1. Upper limit of sealing strip stiffness: value corresponding to outward tension ≤ 0.1mm; 2. Lower limit of door stiffness: value corresponding to the measured maximum outward tension.

[0128] Note: CLD = Compression Load Deformation Test; BUSH element is used to simulate the nonlinear stiffness characteristics of sealing strip.

[0129] This embodiment illustrates the key iterative relationships: 1. Step 1 ↔ Step 2: Closed-loop verification of material parameters; 2. Step 4 ↔ Step 5: Closed-loop correction of simulation model; 3. Step 6 ↔ Step 2 / 4: Back-calculation of target value constraints.

[0130] In another specific embodiment, the specific process of setting the target stiffness value of the door system based on door outward tension control under high-speed wind load is disclosed:

[0131] The first step is component-level testing of the sealing strip, such as... Figure 4 , 5 As shown in Figure 6.

[0132] 1) The stress-strain relationship of the sealing strip was obtained through uniaxial tensile tests on the sealing strip material. The test was conducted in accordance with the national standard GB / T 28-2009 "Determination of Tensile Stress-Strain Properties of Vulcanized Rubber or Thermoplastic Rubber". Through parameter fitting, a third-order Ogden model (elastic model) was used to obtain the fitting parameters for the sponge rubber of the door strip and door opening strip, providing input for CLD simulation. A finite element model of the sealing strip was established in Hypermesh, and the rubber material property parameters for the test fitting were defined. After the settings were completed, the model was imported into ABAQUS to perform CLD compression load simulation calculations, obtaining the sealing strip stiffness values ​​and compression cross-sections under different compression amounts.

[0133] 2) Sealing strip compression load test, such as Figure 7 As shown.

[0134] Different compression section design fixtures were extracted and subjected to CLD testing using a high and low temperature tensile testing machine to obtain the compression load stiffness value of the sealing strip under static compression. This stiffness value can be compared with the stiffness value obtained from the first step of simulation analysis to correct parameters and improve simulation accuracy. This stiffness value provides input for the subsequent dynamic deformation analysis model of the car door.

[0135] 3) Third step: Calculation of high-speed wind load, such as... Figure 8 As shown.

[0136] A whole vehicle CFD simulation analysis model was established in the starccm+ software to calculate the door wind pressure data under different wind speeds (80~120km / h) and different yaw angles (±20°, ±15°, ±10°, ±5°, 0°).

[0137] 4) Fourth step: A CAE model of the car door is built using Hypermesh. The door sealing strip is simulated using BUSH elements, and the stiffness characteristics of the BUSH elements are assigned based on the experimental results from step two. The wind load distribution of the car door obtained from the CFD calculation in step three is interpolated and mapped onto the car door CAE model. The deformation of the car door is analyzed and calculated using NASTRAN software, outputting the maximum outward expansion position and displacement. For example... Figure 9 As shown.

[0138] 5) Fifth step:

[0139] A dynamic gap measuring instrument was used to measure the actual outward opening of the door under high-speed driving conditions, obtaining the maximum outward opening position and amount of the door at the highest vehicle speed and different yaw angles. The measured values ​​were compared with the simulation results from step four to revise the simulation model and improve accuracy.

[0140] 6) Step Six: Through model correction, once the simulation model's accuracy reaches 90%, the model is considered reliable. For example... Figure 10 As shown.

[0141] Definition of target value for sealing strip stiffness under static compression: Since the sealing strip generates a load in the opening direction on the door, increasing the outward tension of the door, its stiffness needs to be reduced. Here, it is defined that under static conditions, the outward tension of the door caused by the sealing strip is no more than 0.1mm. For a more stringent definition, it can also be defined as no more than 0mm.

[0142] This basic model is used to calculate the effect of different sealing strip stiffness values ​​(sealing strip compression reaction force) on the outward thrust of the car door. Here, the upper limit of the stiffness value of the door opening sealing strip and the car door sealing strip under static conditions is defined as the stiffness value that makes the outward thrust of the car door ≤ 0.1mm.

[0143] Definition of target value for door stiffness: The greater the door stiffness, the smaller the outward deformation of the door under the same outward tension load. Usually, the static stiffness of the door is required under the condition of maximum outward tension.

[0144] Specifically, through the fifth step of the test, we obtain the maximum outward opening position and outward opening amount of the door. Using the door CAE model, we can calculate the stiffness value of the door under this outward opening condition. At this time, the stiffness value of the door is the lower limit of stiffness control.

[0145] 7) Obtain real-time vehicle driving data (including at least vehicle speed, vehicle driving direction, and road deviation direction) and external environmental parameters (including at least wind force and wind direction);

[0146] 8) Determine the real-time outward tension of the door by referring to the MAP diagram based on the real-time driving data of the vehicle and the external environmental parameters. The MAP diagram shall be obtained at least through the experimental calibration in step 5).

[0147] 9) Compare the real-time outward expansion of the door with the door stiffness value to determine whether there is a risk of outward expansion of the door;

[0148] 10) When there is a risk of the car door opening outward, the optimal vehicle speed and driving direction are determined based on the MAP, and the vehicle speed is then limited to a preset range above and below the optimal speed. The navigation route is then reset based on the vehicle driving direction, road deflection direction and expected wind direction changes.

[0149] Figure 11 This is a block diagram of an electronic device for setting a target stiffness value of a vehicle door based on the outward expansion control of the vehicle door under high-speed wind load, provided by one or more embodiments of the present invention.

[0150] like Figure 11 As shown, this application provides an electronic device, including: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0151] The memory stores a computer program, which, when executed by the processor, causes the processor to perform steps of a method for setting a target door stiffness value based on door outward flaring control under high-speed wind load.

[0152] This application also provides a computer-readable storage medium storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform steps of a door stiffness value target setting method based on door outward flaring control under high-speed wind load.

[0153] This application also provides a simulation testing platform, including:

[0154] Electronic equipment for implementing the steps of a method for setting the target stiffness value of a vehicle door based on the outward flaring control of the vehicle door under high-speed wind load;

[0155] The processor runs a program, and when the program runs, it executes the steps of a method for setting the target value of door stiffness based on door outward flaring control under high-speed wind load, using data output from electronic devices.

[0156] A storage medium for storing a program that, when running, executes steps based on a method for setting a target door stiffness value for door outward tension control under high-speed wind load, in response to data output from an electronic device.

[0157] The communication bus mentioned in the above electronic devices can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0158] The electronic device comprises a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on the operating system. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory. The operating system can be any one or more computer operating systems that control the electronic device through processes, such as Linux, Unix, Android, iOS, or Windows. Furthermore, in this embodiment of the invention, the electronic device can be a smartphone, tablet computer, or other handheld device, or a desktop computer, portable computer, or other electronic device; there is no particular limitation in this embodiment.

[0159] In this embodiment of the invention, the executing entity for electronic device control can be an electronic device itself, or a functional module within an electronic device capable of calling and executing a program. The electronic device can obtain the firmware corresponding to the storage medium. This firmware is provided by the supplier, and different storage media may have the same or different firmware; no limitation is made here. After obtaining the firmware corresponding to the storage medium, the electronic device can write this firmware into the storage medium; specifically, it burns the firmware corresponding to the storage medium into the storage medium. The process of burning the firmware into the storage medium can be implemented using existing technology, and will not be elaborated upon in this embodiment of the invention.

[0160] Electronic devices can also obtain reset commands corresponding to storage media. These reset commands are provided by the supplier, and the reset commands for different storage media can be the same or different, which is not limited here.

[0161] At this time, the storage medium of the electronic device is a storage medium on which the corresponding firmware has been written. The electronic device can respond to the reset command corresponding to the storage medium on which the corresponding firmware has been written, thereby resetting the storage medium on which the corresponding firmware has been written according to the reset command. The process of resetting the storage medium according to the reset command can be implemented by existing technology and will not be described in detail in this embodiment of the invention.

[0162] For ease of description, the above devices are described separately by function as various units and modules. Of course, in implementing this application, the functions of each unit and module can be implemented in one or more software and / or hardware.

[0163] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined.

[0164] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0165] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application, in essence, or the part that contributes 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 some parts of the embodiments of this application.

[0166] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for setting a target value for door stiffness based on door outward tension control under high-speed wind load, characterized in that, The method for setting the target door stiffness value based on door outward flaring control under high-speed wind load includes: Step S1, Analysis of sealing strip material properties: Obtain the mechanical property parameters of the sealing strip through material-level testing, model fitting and finite element simulation; Step S2, Experimental Verification and Parameter Correction: By comparing the results of compression load deformation tests and simulations, the material parameters of the sealing strip are iteratively corrected. Step S3, wind load calculation: Through whole vehicle CFD simulation, output the door wind pressure distribution under different wind speeds and yaw angles; Step S4, Door Deformation Simulation Analysis: Establish a finite element model of the door and map the wind pressure load, calculate the door deformation and the maximum outward expansion position; Step S5, Real-vehicle verification and model correction: Measure the actual external tensor of the car door, compare it with the simulation results, and correct the model until the model accuracy is ≥90%; Step S6, Define the target stiffness value of the door system: Based on the simulation model after the target is met, determine the upper limit of the stiffness of the sealing strip and the lower limit of the stiffness of the door respectively, and complete the stiffness value target setting.

2. The method for setting the target value of door stiffness based on door outward tension control under high-speed wind load as described in claim 1, characterized in that, Step S1, the analysis of the sealing strip material properties, includes: Conduct uniaxial tensile tests on the sealing strip material to obtain the stress-strain relationship of the material; The experimental data were fitted using a third-order Ogden elastic model to obtain the fitting parameters of the sponge adhesive and solid adhesive for the door strip and door opening strip. A finite element model of the sealing strip was established using Hypermesh and imported into ABAQUS software to perform compression simulation of CLD compression load deformation, outputting the stiffness values ​​of the sealing strip under different compression amounts.

3. The method for setting the target stiffness value of a vehicle door based on door outward tension control under high-speed wind load as described in claim 1, characterized in that, Step S2, experimental verification and parameter correction, includes: Design specialized tooling; Using specialized tooling, a high and low temperature tensile testing machine was used to conduct a CLD compression test on the sealing strip to obtain the actual stiffness value under static compression. Compare the measured stiffness value with the stiffness value output in step S1; By iteratively correcting the sealing strip material parameters based on the differences, the consistency between simulation and experiment can be improved.

4. The method for setting the target value of door stiffness based on door outward tension control under high-speed wind load as described in claim 1, characterized in that, The wind load calculation in step S3 includes: A CFD simulation model of the entire vehicle was created using Star-CCM+ software. The simulation parameters cover wind speeds of 80~120km / h and yaw angles of ±20°~0°. Output the door wind pressure distribution data under various parameter combinations.

5. The method for setting the target stiffness value of a vehicle door based on door outward tension control under high-speed wind load as described in claim 1, characterized in that, Step S4, the door deformation simulation analysis, includes: A finite element model of the car door, including BUSH elements, was created using Hypermesh to simulate the nonlinear stiffness characteristics of the sealing strip. Map the door wind pressure distribution data output in step S3, including the wind pressure load under the CFD simulation model, to the door model. The deformation of the car door was calculated using NASTRAN software to determine the maximum outward expansion position and the predicted displacement value of the door.

6. The method for setting the target value of door stiffness based on door outward tension control under high-speed wind load as described in claim 1, characterized in that, Step S5, real vehicle verification and model correction, includes: Using a dynamic gap meter, the maximum outward opening position and actual outward opening amount of the door were measured under high-speed driving conditions, covering the maximum vehicle speed and different yaw angles. Compare the measured values ​​with the displacement prediction values ​​in step S4, and repeatedly revise the simulation model until the preset accuracy is met.

7. A door stiffness target setting system based on door outward tension control under high-speed wind load, characterized in that, The door stiffness target setting system based on door outward flaring control under high-speed wind load includes: The sealing strip material property analysis module is used to obtain the mechanical property parameters of the sealing strip through material-level testing, model fitting, and finite element simulation. The experimental verification and parameter correction module is used to iteratively correct the sealing strip material parameters by comparing the results of compression load deformation tests and simulations. The wind load calculation module is used to output the door wind pressure distribution under different wind speeds and yaw angles through whole vehicle CFD simulation; The door deformation simulation analysis module is used to establish a finite element model of the door and map wind pressure loads to calculate the door deformation and the maximum outward expansion position. The real-vehicle verification and model correction module is used to measure the actual external tensile of the car door, compare it with the simulation results, and correct the model until the model accuracy is ≥90%. The door system stiffness target definition module is used to determine the upper limit of the sealing strip stiffness and the lower limit of the door stiffness based on the simulation model after the target is met, thus completing the stiffness target setting.

8. An electronic device, characterized in that, include: The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus. The memory stores a computer program, which, when executed by a processor, causes the processor to perform the steps of the door stiffness value target setting method based on door outward tension control under high-speed wind load as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The device stores a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of the door stiffness value target setting method based on door outward tension control under high-speed wind load as described in any one of claims 1 to 6.

10. A simulation testing platform, characterized in that, include: An electronic device for implementing the steps of the door stiffness value target setting method based on door outward tension control under high-speed wind load as described in any one of claims 1 to 6; The processor runs a program, and when the program runs, it executes the steps of the door stiffness value target setting method based on door outward tension control under high-speed wind load as described in any one of claims 1 to 6 from the data output by the electronic device. A storage medium for storing a program that, when running, executes the steps of the door stiffness value target setting method as described in any one of claims 1 to 6 on data output from an electronic device.

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