Automobile simulation data analysis method based on CFD numerical simulation
By collecting and analyzing car multi-source data and airflow edge data, establishing a CFD model for simulation and analysis, it solves the high cost and data inaccurate problems of automobile safety and performance testing in the prior art, and achieves efficient safety and performance detection.
Patent Information
- Application Number
- CN202510255874.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-07-04
AI Technical Summary
In the prior art, automobile safety and performance testing is high, the data and information are large and inaccurate, so it is impossible to comprehensively check all automobile indicators and update them in a timely manner.
By setting up a car data acquisition terminal, collecting multi-source data and airflow edge data, conducting simulation construction and analysis, establishing CFD models, performing level-state and to-state analysis, and detecting safety and performance problems.
It improves the accuracy of data and comprehensiveness of detection, reduces the detection cost and difficulty of data collection, and optimizes the safety and performance issues of the car.
Smart Images
Figure CN120257872A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of automotive simulation data, and specifically to a method for analyzing automotive simulation data based on CFD numerical simulation. Background Art
[0002] CFD is the abbreviation of English Computational Fluid Dynamics. It has developed along with the development of computer technology and numerical calculation technology. Simply speaking, CFD is equivalent to doing experiments "virtually" on a computer to simulate the actual fluid flow situation. Its basic principle is to numerically solve the differential equations that control fluid flow, obtain the discrete distribution of the fluid flow field in a continuous region, and thus approximately simulate the fluid flow situation. It can be considered that CFD is a kind of modern simulation technology; In the prior art, when testing the safety and performance of an automobile, using a physical automobile for testing has a high cost, a large amount of data information, inaccurate and incomplete collection, and has uncertain and inaccurate factors, and it is impossible to check and update the various indicators of the automobile in a timely manner. This is a problem that needs to be solved. Therefore, a method for analyzing automotive simulation data based on CFD numerical simulation is provided herein. Summary of the Invention
[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a method for analyzing automotive simulation data based on CFD numerical simulation, including the following steps: Step S1: Set an automotive data acquisition terminal to collect multi-source data of the automobile and airflow edge data; Step S2: According to the multi-source data of the automobile, perform simulation construction processing on the automobile to obtain an automotive simulation structure image. According to the airflow edge data, perform analysis processing on the airflow edge data to obtain comprehensive airflow simulation data; Step S3: Set an automotive simulation analysis unit to obtain the automotive simulation structure image and the comprehensive airflow simulation data, and establish an automotive CFD model according to the automotive simulation structure image and the comprehensive airflow simulation data; Step S4: According to the automotive CFD model, perform a state analysis on the automotive CFD model to obtain the state simulation value of the automobile, and perform an end-state analysis on the automotive CFD model to obtain the end-state simulation value of the automobile; Step S5: According to the state simulation value and the end-state simulation value of the automobile, detect the safety problems and performance problems of the automobile, and perform safety detection and performance adjustment on the automobile.
[0004] Further, the process of setting an automotive data acquisition terminal to collect multi-source data of the automobile and airflow edge data includes: The vehicle data acquisition terminal is used to acquire multi-source vehicle data and airflow edge data of the vehicle; The multi-source vehicle data includes internal structure data and external structure data; The airflow edge data includes external airflow edge data and internal airflow edge data; According to the vehicle acquisition terminal, the multi-source vehicle data and the airflow edge data of the vehicle are acquired in real time.
[0005] Furthermore, according to the multi-source vehicle data, the process of performing simulation construction processing on the vehicle to obtain a vehicle simulation structure image includes: According to the internal structure data and the external structure data of the multi-source vehicle data, the overall structure of the vehicle is simulated and constructed to obtain a preliminary vehicle simulation structure image; The preliminary vehicle simulation structure image is verified for the vehicle structure according to the multi-source vehicle data to obtain a vehicle simulation structure image.
[0006] Furthermore, according to the airflow edge data, the process of analyzing and processing the airflow edge data to obtain comprehensive airflow simulation data includes: According to the airflow edge data, dimensional processing is performed on the airflow edge data, point-to-point analysis is performed on the external airflow edge data obtained by each vehicle data acquisition terminal to obtain external airflow state data, and internal airflow state data is obtained according to the internal airflow edge data; and the internal airflow state data and the external airflow state data are recorded as comprehensive airflow simulation data.
[0007] Furthermore, a vehicle simulation analysis unit is set up to obtain a vehicle simulation structure image and comprehensive airflow simulation data, and the process of establishing a vehicle CFD model according to the vehicle simulation structure image and the comprehensive airflow simulation data includes: The vehicle simulation analysis unit extracts the vehicle geometric image and the airflow flow process through the vehicle simulation structure image and the comprehensive airflow simulation data, generates vehicle airflow simulation data, performs simulation analysis on the natural ventilation state of the vehicle based on a finite volume method solver, and discretizes the relevant equations; boundary conditions are set in the corresponding vehicle geometric image according to the vehicle airflow simulation data, and the discretized relevant equations are iteratively solved to obtain approximate values of the vehicle airflow simulation data at the corresponding positions of each vehicle acquisition terminal at the corresponding time, and a vehicle CFD model is generated, and the vehicle CFD model is used to obtain comprehensive airflow simulation data.
[0008] Furthermore, according to the vehicle CFD model, the process of performing state analysis on the vehicle CFD model to obtain state simulation values of the vehicle includes: Set up a vehicle state simulation scenario; The vehicle state simulation scenario includes a vehicle static simulation scenario and a vehicle dynamic simulation scenario; According to the static simulation scenario of the vehicle, obtain the internal airflow state data of the comprehensive airflow simulation data of the vehicle CFD model. Discretize the vehicle internal structure corresponding to the internal airflow state data through a numerical algorithm to obtain internal discretized data. Set the flow coefficient, and based on the internal discretized data and the flow coefficient, obtain the internal simulation value; set the air-fluidization threshold, and discretize the vehicle external structure corresponding to the external airflow state data through a numerical algorithm to obtain external discretized data; based on the air-fluidization threshold and the external discretized data, obtain the external simulation value; and based on the internal simulation value and the external simulation value, obtain the stage simulation value.
[0009] Furthermore, the process of performing a state analysis on the vehicle CFD model according to the vehicle CFD model to obtain the state simulation value of the vehicle includes: In the vehicle dynamic simulation scenario, obtain the external airflow state data of the comprehensive airflow simulation data of the vehicle model. Based on each external airflow state data of the external structure data, obtain the state simulation value through each external airflow state data related to the external structure data.
[0010] Furthermore, the process of detecting the safety problems and performance problems of the vehicle according to the stage simulation value and the state simulation value of the vehicle and performing safety detection and performance adjustment on the vehicle includes: According to the stage simulation value of the vehicle, regularly inspect the safety structure inside the vehicle, perform a strength test on the vehicle body structure, and upload the inspection results and test results to professional vehicle maintenance personnel to adjust the safety structure and the vehicle body structure of the vehicle; According to the state simulation value of the vehicle, perform performance tests on various indicators of the vehicle, and upload the performance test results to professional maintenance personnel to further adjust the performance problems of the vehicle.
[0011] Compared with the prior art, the beneficial effects of the present invention are: According to multi-source data of the vehicle, perform simulation and construction processing on the vehicle to obtain a vehicle simulation structure image, improve the accuracy of the vehicle structure image. According to the airflow edge data, perform analysis and processing on the airflow edge data to obtain comprehensive airflow simulation data, collect airflow data in all directions, and improve the accuracy of the data. Set a vehicle simulation analysis unit to obtain the vehicle simulation structure image and the comprehensive airflow simulation data, and based on the vehicle simulation structure image and the comprehensive airflow simulation data, establish a vehicle CFD model, which is convenient for simulating the vehicle model in multiple scenarios, and real-time detecting various performances and safety of the vehicle. According to the vehicle CFD model, perform a stage analysis on the vehicle CFD model to obtain the stage simulation value of the vehicle, perform a state analysis on the vehicle CFD model to obtain the state simulation value of the vehicle, detect the safety problems and performance problems of the vehicle, further optimize various problems of the vehicle, and reduce the detection cost and the difficulty of data collection. Description of the Drawings
[0012] Figure 1 This is the schematic diagram of the automotive simulation data analysis method based on CFD numerical simulation for the embodiments of the present application. Detailed implementation manners
[0013] As Figure 1 shown, the automotive simulation data analysis method based on CFD numerical simulation includes the following steps: Step S1: Set up an automotive data acquisition terminal to collect multi-source automotive data and airflow edge data; Step S2: According to the multi-source automotive data, perform simulation setup processing on the vehicle to obtain an automotive simulation structure image. According to the airflow edge data, perform analysis processing on the airflow edge data to obtain comprehensive airflow simulation data; Step S3: Set up an automotive simulation analysis unit to obtain the automotive simulation structure image and the comprehensive airflow simulation data, and establish an automotive CFD model based on the automotive simulation structure image and the comprehensive airflow simulation data; Step S4: According to the automotive CFD model, perform state analysis on the automotive CFD model to obtain the state simulation value of the vehicle, and perform end-state analysis on the automotive CFD model to obtain the end-state simulation value of the vehicle; Step S5: According to the state simulation value and the end-state simulation value of the vehicle, detect the safety problems and performance problems of the vehicle, and perform safety detection and performance adjustment on the vehicle.
[0014] It should be further noted that in the specific implementation process, the process of setting up an automotive data acquisition terminal to collect multi-source automotive data and airflow edge data includes: The automotive data acquisition terminal is used to collect multi-source automotive data and airflow edge data of the vehicle; The multi-source automotive data includes internal structure data and external structure data; The internal structure data includes cockpit structure data, ventilation structure data, safety structure data, and lighting structure data; the external structure data includes wheel loss data, chassis structure data, and body structure data; It should be further noted that in the specific implementation process, the cockpit structure data includes but is not limited to seat adjustment and seat layout in the vehicle, the ventilation structure data includes but is not limited to the air-conditioning control panel, air vents, air-conditioning compressor, ventilation openings, and air circulation components related to the air-conditioning system, the safety structure data includes but is not limited to seatbelt adjustment and airbag usability, the lighting data includes but is not limited to roof lights, reading lights, trunk lights, footwell lighting, and ambient lights, the wheel loss data refers to the degree of wheel loss during vehicle braking, the chassis structure data refers to the layout, structure, and design of the chassis, and the body structure data includes but is not limited to body materials, body types, body dimensions, and vehicle weight; The airflow edge data includes external airflow edge data and internal airflow edge data; The external airflow edge data includes airflow velocity, airflow direction, airflow density distribution, and airflow pressure value; the internal airflow edge data includes air conditioner airflow density, air conditioner airflow temperature, and ventilation air density; Based on the vehicle acquisition terminal, the vehicle multi-source data and airflow edge data of the vehicle are collected in real time.
[0015] It should be further noted that in the specific implementation process, according to the vehicle multi-source data, the vehicle is subjected to simulation and construction processing to obtain a vehicle simulation structure image. According to the airflow edge data, the airflow edge data is analyzed and processed to obtain the process of airflow comprehensive simulation data, including: Based on the internal structure data and external structure data of the vehicle multi-source data, the overall structure of the vehicle is subjected to simulation and construction processing to obtain a preliminary vehicle simulation structure image; It should be further noted that in the specific implementation process, the specific process of subjecting the overall structure of the vehicle to simulation and construction processing includes: setting up a three-dimensional space coordinate system, capturing the structural characteristics of the external structure data to obtain the external structure distribution characteristics, and mapping the external structure distribution characteristics to the three-dimensional space coordinate system. According to the external structure data, the structural characteristics of the internal structure data are captured and the internal and external structure correlation is extracted to obtain the internal structure layout characteristics and the internal and external correlation values. According to the internal and external correlation values, the internal structure layout characteristics are mapped into the three-dimensional space coordinate system containing the external structure distribution characteristics; Based on the vehicle multi-source data, the vehicle preliminary simulation structure image is verified for the vehicle structure to obtain a vehicle simulation structure image; It should be further noted that in the specific implementation process, the specific process of verifying the vehicle structure of the vehicle preliminary simulation structure image according to the vehicle multi-source data includes: extracting the correlation value between the external structure distribution characteristics and the internal structure layout characteristics of the vehicle simulation structure image to obtain the internal and external image correlation value, and performing similarity matching on the internal and external image correlation value and the internal and external correlation value to obtain the correlation similarity value. A similarity threshold is set. If the correlation similarity value is greater than or equal to the similarity threshold, the vehicle preliminary simulation structure image is recorded as the vehicle simulation structure image. If the correlation similarity value is less than the similarity threshold, the vehicle preliminary simulation structure image is subjected to re-simulation and construction processing until the correlation similarity value is greater than or equal to the similarity threshold; Based on the airflow edge data, the airflow edge data is processed in dimensions to obtain airflow comprehensive simulation data; It should be further noted that in the specific implementation process, the specific process of dimension processing of the airflow edge data according to the airflow edge data includes: performing point-to-point analysis on the external airflow edge data obtained by each vehicle data acquisition terminal, multiplying the airflow velocity, airflow density distribution, and airflow pressure values obtained by each vehicle data acquisition terminal according to the airflow direction multiple times and superimposing them to obtain the external airflow state data, multiplying the air-conditioning airflow density, air-conditioning airflow temperature, and ventilation air density obtained by each vehicle data acquisition terminal to obtain the internal airflow state data; and recording the internal airflow state data and the external airflow state data as the airflow comprehensive simulation data.
[0016] It should be further noted that in the specific implementation process, a vehicle simulation analysis unit is set up to obtain the vehicle simulation structure image and the airflow comprehensive simulation data, and the process of establishing a vehicle CFD model according to the vehicle simulation structure image and the airflow comprehensive simulation data includes: The vehicle simulation analysis unit extracts the vehicle geometric image and the airflow flow process through the vehicle simulation structure image and the airflow comprehensive simulation data to generate vehicle airflow simulation data, and performs simulation analysis on the natural ventilation state of the vehicle based on a finite volume method solver. The simulation analysis refers to analyzing the relevant equations obtained in the natural ventilation state of the vehicle through the finite volume method solver and discretizing the relevant equations; setting boundary conditions in the corresponding vehicle geometric image according to the vehicle airflow simulation data, performing iterative solution on the discretized relevant equations, obtaining approximate values of the vehicle airflow simulation data at the corresponding positions of each vehicle acquisition terminal at the corresponding time, and updating the approximate values to the entire geometric image to generate a vehicle CFD model, and the vehicle CFD model is used to obtain the airflow comprehensive simulation data.
[0017] It should be further noted that in the specific implementation process, according to the vehicle CFD model, the process of performing stage analysis on the vehicle CFD model to obtain the stage simulation value of the vehicle and performing terminal analysis on the vehicle CFD model to obtain the terminal simulation value of the vehicle includes: Set up a vehicle state simulation scenario; The vehicle state simulation scenario includes a vehicle static simulation scenario and a vehicle dynamic simulation scenario; Place the vehicle CFD model in a static vehicle simulation scenario, conduct a state analysis on the vehicle CFD model, obtain the internal airflow state data of the comprehensive airflow simulation data of the vehicle CFD model, discretize the vehicle internal structure corresponding to the internal airflow state data through a numerical algorithm to obtain internal discrete data, calculate the mean value of each internal discrete data, set a flow coefficient, and multiply the mean value calculation result by the flow coefficient to obtain an internal simulation value. Set an air flow threshold, discretize the vehicle external structure corresponding to the external airflow state data through a numerical algorithm to obtain external discrete data, analyze the vehicle body strength based on the air flow threshold and the external discrete data. If the external airflow state data is greater than the air flow threshold, obtain the difference between the external airflow state data and the air flow threshold, and perform a product calculation on the difference to obtain an external simulation value, and calculate the ratio of the internal simulation value to the external simulation value to obtain a state simulation value; Place the vehicle CFD model in a dynamic vehicle simulation scenario, conduct a state analysis on the vehicle CFD model, obtain the external airflow state data of the comprehensive airflow simulation data of the vehicle model. According to each external airflow state data of the external structure data, under the vehicle acceleration state, deceleration state, and emergency braking state, take the mean value of the external airflow data around all external structures through each external airflow state data related to the external structure data to obtain a state simulation value.
[0018] It should be further noted that in the specific implementation process, according to the state simulation value and the state simulation value of the vehicle, detect the safety issues and performance issues of the vehicle. The process of conducting safety detection and performance adjustment on the vehicle includes: According to the state simulation value of the vehicle, regularly inspect the safety structure inside the vehicle, conduct strength tests on the vehicle body structure, and upload the inspection results and test results to professional vehicle maintenance personnel to adjust the safety structure and the vehicle body structure of the vehicle; According to the state simulation value of the vehicle, conduct performance tests on various indicators of the vehicle, and upload the performance test results to professional maintenance personnel to further adjust the performance issues of the vehicle.
[0019] The above embodiments are only used to illustrate the technical method of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.
Claims
1. An automotive simulation data analysis method based on CFD numerical simulation, characterized in that, It includes the following steps: Step S1: Set up an automotive data acquisition terminal to collect multi-source automotive data and airflow edge data; Step S2: Based on the multi-source automotive data, perform simulation and construction processing on the vehicle to obtain an automotive simulation structure image. Based on the airflow edge data, perform analysis and processing on the airflow edge data to obtain comprehensive airflow simulation data; Step S3: Set up an automotive simulation analysis unit to obtain the automotive simulation structure image and the comprehensive airflow simulation data, and establish an automotive CFD model based on the automotive simulation structure image and the comprehensive airflow simulation data; Step S4: Based on the automotive CFD model, perform a state analysis on the automotive CFD model to obtain the state simulation value of the vehicle, and perform an end-state analysis on the automotive CFD model to obtain the end-state simulation value of the vehicle; Step S5: Based on the state simulation value and the end-state simulation value of the vehicle, detect the safety issues and performance issues of the vehicle, and perform safety detection and performance adjustment on the vehicle.
2. The method for analyzing automotive simulation data based on CFD numerical simulation according to claim 1, wherein The process of setting up an automotive data acquisition terminal to collect multi-source automotive data and airflow edge data includes: The automotive data acquisition terminal is used to collect multi-source automotive data and airflow edge data of the vehicle; The multi-source automotive data includes internal structure data and external structure data; The airflow edge data includes external airflow edge data and internal airflow edge data; According to the automotive acquisition terminal, the multi-source automotive data and the airflow edge data of the vehicle are collected in real time.
3. The method for analyzing automotive simulation data based on CFD numerical simulation according to claim 2, wherein, The process of performing simulation and construction processing on the vehicle based on the multi-source automotive data to obtain an automotive simulation structure image includes: Based on the internal structure data and the external structure data of the multi-source automotive data, perform simulation and construction processing on the overall structure of the vehicle to obtain a preliminary automotive simulation structure image; Perform vehicle structure verification on the preliminary automotive simulation structure image based on the multi-source automotive data to obtain the automotive simulation structure image.
4. The method for analyzing automotive simulation data based on CFD numerical simulation according to claim 3, characterized in that, The process of performing analysis and processing on the airflow edge data based on the airflow edge data to obtain comprehensive airflow simulation data includes: Based on the airflow edge data, perform dimensional processing on the airflow edge data, perform point-to-point analysis on the external airflow edge data obtained by each automotive data acquisition terminal to obtain external airflow state data, and obtain internal airflow state data based on the internal airflow edge data; and record the internal airflow state data and the external airflow state data as comprehensive airflow simulation data.
5. The method for analyzing automotive simulation data based on CFD numerical simulation according to claim 4, wherein, The process of setting up an automotive simulation analysis unit to obtain the automotive simulation structure image and the comprehensive airflow simulation data, and establish an automotive CFD model based on the automotive simulation structure image and the comprehensive airflow simulation data includes: The vehicle simulation analysis unit extracts the vehicle geometric image and the air flow process through the vehicle simulation structure image and the comprehensive air flow simulation data, generates vehicle air flow simulation data, performs simulation analysis on the natural ventilation state of the vehicle based on the finite volume method solver, and discretizes the relevant equations; sets boundary conditions within the corresponding vehicle geometric image according to the vehicle air flow simulation data, and iteratively solves the discretized relevant equations to obtain approximate values of the vehicle air flow simulation data at the corresponding positions of each vehicle acquisition terminal at the corresponding time, generating a vehicle CFD model, and the vehicle CFD model is used to obtain comprehensive air flow simulation data.
6. The method for analyzing automotive simulation data based on CFD numerical simulation according to claim 5, wherein The process of obtaining the state simulation value of the vehicle by performing state analysis on the vehicle CFD model according to the vehicle CFD model includes: Setting the vehicle state simulation scenario; The vehicle state simulation scenario includes a vehicle static simulation scenario and a vehicle dynamic simulation scenario; According to the vehicle static simulation scenario, obtain the internal air flow state data of the comprehensive air flow simulation data of the vehicle CFD model, discretize the vehicle internal structure corresponding to the internal air flow state data through a numerical algorithm to obtain internal discretized data, set the flow coefficient, and obtain the internal simulation value according to the internal discretized data and the flow coefficient; set the air flow threshold, discretize the vehicle external structure corresponding to the external air flow state data through a numerical algorithm to obtain external discretized data; obtain the external simulation value according to the air flow threshold and the external discretized data; and obtain the state simulation value according to the internal simulation value and the external simulation value.
7. The method for analyzing automotive simulation data based on CFD numerical simulation according to claim 6, characterized in that, The process of obtaining the to-state simulation value of the vehicle by performing to-state analysis on the vehicle CFD model according to the vehicle CFD model includes: According to the external air flow state data of the comprehensive air flow simulation data of the vehicle model obtained within the vehicle dynamic simulation scenario, obtain the to-state simulation value according to each external air flow state data of the external structure data through each external air flow state data related to the external structure data.
8. The method for analyzing automotive simulation data based on CFD numerical simulation according to claim 7, characterized in that The process of detecting the safety problems and performance problems of the vehicle and performing safety detection and performance adjustment on the vehicle according to the state simulation value and the to-state simulation value of the vehicle includes: According to the state simulation value of the vehicle, regularly check the safety structure inside the vehicle, perform strength tests on the vehicle body structure, and upload the inspection results and test results to professional vehicle maintenance personnel to adjust the safety structure and the vehicle body structure of the vehicle; According to the to-state simulation value of the vehicle, perform performance tests on various indicators of the vehicle, and upload the performance test results to professional maintenance personnel to further adjust the performance problems of the vehicle.