Vehicle aerodynamics modeling methods and related equipment

Abstract

The present invention provides a vehicle aerodynamic modeling method and related equipment, the method comprising: obtaining the CAS data and chassis guard plate model of the vehicle; determining the grille feature information of the vehicle according to the CAS data; establishing the external CAS model of the vehicle according to the CAS data when the vehicle does not have a grille feature or has an active air intake grille; establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model. The modeling method provided in the embodiment of the present application can reduce the workload in the modeling stage, improve the modeling efficiency of the aerodynamic model of the vehicle, reduce the processing difficulty and calculation amount in the subsequent gridding processing and simulation calculation process, improve the simulation analysis efficiency, and at the same time facilitate the calculation and analysis of the air flow characteristics of the bottom area of ​​the vehicle during the simulation analysis process, which provides a guarantee for the simulation analysis results to more realistically reflect the gas flow characteristics near the vehicle, and improve the authenticity and reliability of the simulation analysis results.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile design, and in particular to a vehicle aerodynamic modeling method and related equipment. Background Art

[0002] With the increasing popularity of aerodynamic knowledge and the increasing demand for driving range, the aerodynamic performance of automobiles has received more and more attention from automobile manufacturers. At present, CFD (Computational Fluid Dynamics) simulation analysis has been widely used in the research and development process due to its advantages such as convenience, intuitiveness and low cost. However, in practical applications, the analysis efficiency and result accuracy of CFD simulation analysis are directly related to the vehicle aerodynamic model used in the simulation, which makes it difficult to balance the analysis efficiency and result accuracy when performing CFD simulation analysis, which is not conducive to the efficient and reliable development of the automobile research and development process. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides a vehicle aerodynamic modeling method.

[0005] A second aspect of the present invention provides a vehicle aerodynamic modeling device.

[0006] A third aspect of the present invention provides a storage medium.

[0007] A fourth aspect of the present invention provides an electronic device.

[0008] In view of this, according to a first aspect of an embodiment of the present application, a vehicle aerodynamic modeling method is proposed, comprising:

[0009] Obtain the vehicle's CAS (Concept A Surface) data and chassis guard plate model;

[0010] Determine the grille feature information of the vehicle based on the CAS data;

[0011] In the case where the vehicle does not have a grille feature or has an active air intake grille, an external CAS model of the vehicle is established based on the CAS data;

[0012] The aerodynamic model of the vehicle is established based on the external CAS model and the chassis guard plate model.

[0013] In a feasible implementation, the step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model includes:

[0014] According to the assembly position information of the chassis guard plate, the chassis guard plate model is connected to the external CAS model;

[0015] A Boolean operation is performed on the chassis panel model and the outer CAS model to determine a first model, so as to establish an aerodynamic model of the vehicle based on the first model.

[0016] In a feasible implementation manner, the step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model further includes:

[0017] Get vehicle parts information;

[0018] Determine the exposed component information of the vehicle according to the component information and the first model, where the exposed components at least include a wheel assembly, a wheel cover, a spoiler, and a battery pack;

[0019] According to the exposed component information, obtain the exposed component model;

[0020] Connecting the exposed component model to the first model according to the assembly position information of the exposed component;

[0021] A Boolean operation is performed on the exposed component model and the first model to determine a second model, so as to establish an aerodynamic model of the vehicle based on the second model.

[0022] In a feasible implementation manner, the step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model further includes:

[0023] In the case that the vehicle does not have a grille feature, determining the second model to be a whole vehicle simulation model;

[0024] The aerodynamic model of the vehicle is established based on the whole vehicle simulation model.

[0025] In a feasible implementation manner, the step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model further includes:

[0026] When the vehicle has an active air intake grille, obtaining a closed state model of the active air intake grille;

[0027] Connecting the closed state model to the second model according to the assembly position information of the active air intake grille;

[0028] A Boolean operation is performed on the closed state model and the second model to determine a third model, so as to establish an aerodynamic model of the vehicle based on the third model.

[0029] In a feasible implementation manner, the step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model further includes:

[0030] In the case where the vehicle has an active air intake grille, determining the third model as a whole vehicle simulation model;

[0031] The aerodynamic model of the vehicle is established based on the whole vehicle simulation model.

[0032] In a feasible implementation manner, the step of establishing an aerodynamic model of the vehicle according to the whole vehicle simulation model includes:

[0033] Meshing the whole vehicle simulation model to determine the vehicle mesh model;

[0034] Determine the mesh model as an aerodynamic model.

[0035] According to a second aspect of an embodiment of the present application, a vehicle aerodynamic modeling device is provided, comprising:

[0036] The first acquisition module is used to acquire the CAS data and chassis guard plate model of the vehicle;

[0037] A first determination module, configured to determine the presence of grille feature information of the vehicle according to the CAS data;

[0038] A first processing module is used to establish an external CAS model of the vehicle according to the CAS data when the vehicle does not have a grille feature or has an active air intake grille;

[0039] The second processing module is used to establish an aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model.

[0040] According to a third aspect of an embodiment of the present application, a storage medium is proposed, the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the vehicle aerodynamic modeling method as described in any one of the first aspects above.

[0041] According to the fourth aspect of an embodiment of the present application, an electronic device is proposed, which includes at least one processor and at least one memory connected to the processor, wherein the processor is used to call program instructions in the memory to execute a vehicle aerodynamic modeling method such as any one of the above-mentioned first aspects.

[0042] Compared with the prior art, the present invention includes at least the following beneficial effects: the vehicle aerodynamic modeling method provided in the embodiment of the present application obtains the CAS data and the chassis guard plate model of the vehicle; determines the grille feature information of the vehicle according to the CAS data; and establishes the external CAS model of the vehicle according to the CAS data when the vehicle has no grille feature or has an active air intake grille; the aerodynamic model of the vehicle is established according to the external CAS model and the chassis guard plate model. During the vehicle development process, based on the current styling stage of the vehicle, the CAS data of the vehicle is acquired to determine the grille feature information of the vehicle, thereby using the grille feature information of the vehicle to determine whether the vehicle has a grille feature at the current stage. If the vehicle has no grille feature or has an active air intake grille, it means that based on the styling of the vehicle at the current stage, the vehicle cabin can enter The amount of gas is extremely small and can be ignored, so the external CAS model of the vehicle can be established according to the CAS data, and the chassis guard plate model of the vehicle can be combined as the main body of the vehicle to establish the aerodynamic model of the vehicle, so as to avoid modeling the areas and components with low impact on the aerodynamic performance of the vehicle, reduce the workload in the modeling stage, improve the modeling efficiency of the aerodynamic model of the vehicle, and help reduce the processing difficulty and calculation amount in the subsequent meshing and simulation calculation process, improve the simulation analysis efficiency, and at the same time, because the chassis guard plate is introduced into the aerodynamic model of the vehicle, the air flow characteristics of the bottom area of ​​the vehicle can be calculated and analyzed during the simulation analysis, which provides a guarantee for the simulation analysis results to more realistically reflect the gas flow characteristics of the bottom area of ​​the vehicle, and is conducive to improving the authenticity and reliability of the simulation analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0044] Figure 1 A schematic flow chart of a vehicle aerodynamic modeling method according to an embodiment of the present application;

[0045] Figure 2 A schematic application effect diagram of a vehicle aerodynamic modeling method according to an embodiment of the present application;

[0046] Figure 3 A schematic structural block diagram of a vehicle aerodynamic modeling device according to an embodiment of the present application;

[0047] Figure 4A schematic structural block diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0049] like Figure 1 As shown, according to a first aspect of an embodiment of the present application, a vehicle aerodynamic modeling method is proposed, comprising:

[0050] Step S101: Acquire the CAS data and chassis guard plate model of the vehicle;

[0051] Specifically, during the vehicle styling process, the vehicle's styling will continue to be specific, and the vehicle's styling features will continue to increase. Therefore, at different vehicle styling stages, the vehicle's styling features will be different. Then, in the vehicle's current styling stage, by acquiring the vehicle's CAS data, the vehicle's current styling features can be understood, and the vehicle's chassis guard plate model can be acquired at the same time to provide a reference for the subsequent aerodynamic model establishment process.

[0052] It is understandable that the aerodynamic performance of a vehicle is mainly affected by the surface styling features of the vehicle. CAS data usually covers the internal and external styling data of the vehicle, so that the styling features of the vehicle at the current stage can be analyzed based on the CAS data.

[0053] Step S102: determining the grille feature information of the vehicle according to the CAS data;

[0054] Specifically, the grille is usually located on the outside of the vehicle, so that the grille feature information of the vehicle at the current styling stage will be reflected in the CAS data. Therefore, when the CAS data of the vehicle is obtained, the grille feature information of the vehicle can be determined based on the CAS data. Based on the grille feature information, it can be judged whether the grille features are reflected in the styling features of the vehicle at the current styling stage, thereby providing a reference for the subsequent establishment of the vehicle's aerodynamic model.

[0055] It is understandable that the grille is usually provided with an air guide port, and the air guide port is connected to the engine room of the vehicle, so the presence or absence of the grille feature directly affects the number of factors that need to be considered in the simulation analysis.

[0056] Step S103: when the vehicle does not have a grille feature or has an active air intake grille, an external CAS model of the vehicle is established according to the CAS data;

[0057] Specifically, if the vehicle does not have a grille feature, it means that the grille feature has not been introduced at the current styling stage of the vehicle, so that the gas outside the vehicle has no channel to flow into the cabin, and the amount of gas that can enter the vehicle cabin is extremely small. Therefore, the influence of the cabin and its internal components on the aerodynamic performance of the vehicle can be ignored, and there is no need to model and simulate the cabin and its internal components.

[0058] If the vehicle has an active air intake grille, it means that the vehicle can control the connection or disconnection between the cabin and the external environment by changing the opening and closing of the active air intake grille. Therefore, when modeling, the active air intake grille can be regarded as a closed state to reduce the amount of gas that can enter the vehicle cabin. Therefore, the impact of the cabin and its internal components on the vehicle's aerodynamic performance can also be ignored, and there is no need to model and simulate the cabin and its internal components.

[0059] Therefore, when the vehicle does not have a grille feature or has an active air intake grille, an external CAS model of the vehicle can be established according to the CAS data of the vehicle, so as to facilitate the subsequent establishment of the vehicle's aerodynamic model based on the external CAS model, thereby reducing the number of components involved in the aerodynamic model, thereby reducing the workload during modeling and improving modeling efficiency. In addition, since the number of components involved in the aerodynamic model is reduced, it is also beneficial to reduce the number of grids in the aerodynamic model and improve the computational efficiency during simulation analysis.

[0060] It can be understood that the external CAS model of the vehicle is a closed body model.

[0061] Step S104: Establishing an aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model.

[0062] Specifically, on the basis of the vehicle's external CAS model, the vehicle's chassis guard plate model can be further combined to establish the vehicle's aerodynamic model, so that in the subsequent simulation analysis process, the influence of the chassis guard plate on the gas flow characteristics in the bottom area of ​​the vehicle can be further introduced, thereby improving the authenticity and reliability of the simulation analysis results, making the simulation results closer to the actual situation, improving the accuracy of the simulation analysis, and providing a reliable reference basis for improving the vehicle's aerodynamic performance.

[0063] For example, Figure 2 As shown, Figure 2 The following schematically shows an aerodynamic model of a vehicle established based on the modeling method provided in an embodiment of the present application. Figure 2The blank area in the middle represents the vehicle, and the area around the vehicle represents the flow field area around the vehicle. It is not difficult to see that the vehicle is represented as a closed body in the aerodynamic model, and there are no other parts inside the vehicle, which greatly reduces the difficulty of simulation calculation. In addition, due to the introduction of the chassis guard plate in the aerodynamic model, the contour of the bottom of the vehicle is closer to the bottom contour of the actual vehicle.

[0064] Compared with the technical solution of establishing the aerodynamic model of the vehicle based only on the external CAS model of the vehicle, the modeling method provided in the embodiment of the present application is conducive to more realistically reflecting the flow field characteristics of the bottom area of ​​the vehicle and improving the accuracy of the simulation results. It can be understood that the external CAS model of the vehicle is usually a flat chassis model, so it is difficult to truly reflect the gas flow characteristics of the bottom area of ​​the vehicle based only on the external CAS model of the vehicle.

[0065] At the same time, compared with the technical solution of establishing a vehicle aerodynamic model based on a whole vehicle model, the modeling method provided in the embodiment of the present application can reduce the number of components introduced during modeling, reduce the difficulty of modeling, and improve the efficiency of simulation analysis while ensuring the accuracy and reliability of the simulation results.

[0066] In summary, the vehicle aerodynamic modeling method provided in the embodiment of the present application can acquire the CAS data of the vehicle based on the current styling stage of the vehicle during the vehicle development process to determine the grille feature information of the vehicle, and then use the grille feature information of the vehicle to determine whether the vehicle has a grille feature at the current stage. If the vehicle does not have a grille feature or has an active air intake grille, it means that based on the styling of the vehicle at the current stage, the amount of gas that can enter the vehicle cabin is extremely small and can be ignored. Therefore, the external CAS model of the vehicle can be established according to the CAS data, and the chassis guard plate model of the vehicle is combined as the body of the vehicle to establish the aerodynamic model of the vehicle, so as to avoid modeling the areas and components with low impact on the aerodynamic performance of the vehicle, reduce the workload in the modeling stage, improve the modeling efficiency of the aerodynamic model of the vehicle, and help reduce the processing difficulty and calculation amount in the subsequent gridding and simulation calculation process, and improve the efficiency of simulation analysis. At the same time, since the chassis guard plate is introduced into the aerodynamic model of the vehicle, the air flow characteristics of the bottom area of ​​the vehicle can be calculated and analyzed during the simulation analysis process, which provides a guarantee for the simulation analysis results to more realistically reflect the gas flow characteristics of the bottom area of ​​the vehicle, and helps to improve the authenticity and reliability of the simulation analysis results.

[0067] In some examples, the step of establishing an aerodynamic model of the vehicle based on the outer CAS model and the chassis guard plate model includes:

[0068] According to the assembly position information of the chassis guard plate, the chassis guard plate model is connected to the external CAS model;

[0069] A Boolean operation is performed on the chassis panel model and the outer CAS model to determine a first model, so as to establish an aerodynamic model of the vehicle based on the first model.

[0070] Specifically, in the process of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model, the chassis guard plate model can be connected to the external CAS model of the vehicle according to the assembly position information of the chassis guard plate, and Boolean operations can be performed on the chassis guard plate model and the external CAS model to connect the chassis guard plate model and the external CAS model into a closed body, thereby obtaining a first model. The first model can more realistically reflect the contour features of the bottom of the vehicle, and is convenient for further realistically reflecting the flow field boundary shape of the bottom area of ​​the vehicle based on the first model. The aerodynamic model established based on the first model can be beneficial in the process of simulation analysis. Improve the authenticity and accuracy of the simulation analysis results, and provide a reliable reference basis for improving the aerodynamic performance of the vehicle.

[0071] It is understandable that the assembly position information of the aforementioned chassis guard plate can be obtained according to the assembly requirements of the vehicle.

[0072] It should be noted that if there are small components such as bolts, nuts and wiring harnesses with a diameter less than 5mm in the chassis guard plate model, the aforementioned small components can be deleted, and the hole structure left after the deletion of the small components can be filled to ensure that the chassis guard plate model after the deletion of the aforementioned small components is a closed body, reduce the difficulty of subsequent meshing processing, and avoid the impact of gas entering the aforementioned hole structure during analysis to converge the simulation calculation, thereby improving the efficiency of simulation calculation. At the same time, if there are holes and / or drainage holes in the chassis guard plate model to avoid components such as motors, they should also be filled.

[0073] In some examples, the step of establishing an aerodynamic model of the vehicle based on the outer CAS model and the chassis guard plate model further includes:

[0074] Get vehicle parts information;

[0075] Determine the exposed component information of the vehicle according to the component information and the first model, where the exposed components at least include a wheel assembly, a wheel cover, a spoiler, and a battery pack;

[0076] According to the exposed component information, obtain the exposed component model;

[0077] Connecting the exposed component model to the first model according to the assembly position information of the exposed component;

[0078] A Boolean operation is performed on the exposed component model and the first model to determine a second model, so as to establish an aerodynamic model of the vehicle based on the second model.

[0079] Specifically, in the process of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model, the vehicle parts information can also be obtained, and then the exposed component information of the vehicle can be determined according to the vehicle parts information and the first model. It should be noted that the exposed components refer to the components that are at least partially located outside the first model when the components are connected to the first model according to the assembly position information of each component. Therefore, during the actual driving of the vehicle, the exposed components are likely to have a greater impact on the gas flow around the vehicle. In order to more realistically simulate the gas flow around the vehicle during the simulation analysis process and to guide the improvement of the vehicle's aerodynamic performance according to the simulation analysis results, the exposed components are further considered in the modeling process. The exposed components at least include the vehicle's wheel assembly, wheel cover, spoiler and battery pack.

[0080] It can be understood that the exposed component information includes assembly position information of each exposed component.

[0081] Furthermore, according to the exposed component information, the corresponding exposed component model is obtained, and according to the assembly position information of the exposed component, the exposed component is connected to the first model, and further Boolean operations are performed on the exposed component model and the first model to connect the exposed component model and the first model into a closed body to obtain a second model, so that the second model can more realistically reflect the overall external contour characteristics of the vehicle, and is convenient for further realistically reflecting the flow field boundary shape of the area surrounding the vehicle based on the second model. Furthermore, the aerodynamic model established based on the second model can be beneficial in the process of simulation analysis. Improve the authenticity and accuracy of the simulation analysis results, and provide a more reliable reference basis for improving the aerodynamic performance of the vehicle.

[0082] It should be noted that if there are small components such as bolts, nuts and wiring harnesses with a diameter less than 5mm in the exposed component model, the aforementioned small components can be deleted, and the hole structure left after deleting the small components can be filled to ensure that the exposed component model after deleting the aforementioned small components is a closed body, reduce the difficulty of subsequent meshing processing, and avoid the impact of gas entering the aforementioned hole structure during analysis on the convergence of simulation calculations, thereby improving the efficiency of simulation calculations. In order to reduce the difficulty of subsequent meshing processing, when connecting the exposed component model to the first model, the small gaps or hole structures at the corresponding connection can be filled, but it should be noted that when filling the aforementioned small gaps or hole structures, it should be avoided to exceed the maximum size range of the relevant components, so as not to affect the authenticity of subsequent simulation calculations. For example, when connecting the chassis guard plate and the wheel cover, the filled part should not exceed the original maximum size range of the chassis guard plate, so as not to change the flow field state at that place during simulation analysis and reduce the authenticity of the simulation.

[0083] In some feasible examples, exposed components may also include suspension, brake discs, calipers, etc.

[0084] In some examples, the step of establishing an aerodynamic model of the vehicle based on the outer CAS model and the chassis guard plate model further includes:

[0085] In the case that the vehicle does not have a grille feature, determining the second model to be a whole vehicle simulation model;

[0086] The aerodynamic model of the vehicle is established based on the whole vehicle simulation model.

[0087] Specifically, in the process of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model, the second model can also be determined as the whole vehicle simulation model of the vehicle when the vehicle does not have a grille feature. Then, the whole vehicle simulation model can be gridded to establish the aerodynamic model of the vehicle. This reduces the workload in the modeling stage and improves the modeling efficiency of the vehicle's aerodynamic model. It is also beneficial to reduce the processing difficulty and calculation amount in the subsequent gridding and simulation calculation process, thereby improving the efficiency of simulation analysis.

[0088] In some examples, the step of establishing an aerodynamic model of the vehicle based on the outer CAS model and the chassis guard plate model further includes:

[0089] When the vehicle has an active air intake grille, obtaining a closed state model of the active air intake grille;

[0090] Connecting the closed state model to the second model according to the assembly position information of the active air intake grille;

[0091] A Boolean operation is performed on the closed state model and the second model to determine a third model, so as to establish an aerodynamic model of the vehicle based on the third model.

[0092] Specifically, in the process of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model, if the vehicle has an active air intake grille, the closed state model of the active air intake grille can be further obtained, and according to the assembly position information of the active air intake grille, the aforementioned closed state model is connected to the second model, and Boolean operations are performed on the closed state model and the second model to connect the closed state model and the second model into a closed body to obtain a third model, so that the third model can more realistically reflect the external contour characteristics of the active air intake grille when it is in a closed state, and it is convenient to further realistically reflect the flow field boundary shape of the front area of ​​the vehicle based on the third model, and improve the restoration of the external contour of the vehicle. The aerodynamic model established based on the third model can be beneficial to improve the authenticity and accuracy of the simulation analysis results during the simulation analysis process, and provide a more reliable reference basis for improving the aerodynamic performance of the vehicle.

[0093] In some examples, the step of establishing an aerodynamic model of the vehicle based on the outer CAS model and the chassis guard plate model further includes:

[0094] In the case where the vehicle has an active air intake grille, determining the third model as a whole vehicle simulation model;

[0095] The aerodynamic model of the vehicle is established based on the whole vehicle simulation model.

[0096] Specifically, in the process of establishing the vehicle's aerodynamic model based on the external CAS model and the chassis guard plate model, the third model can also be determined as the whole vehicle simulation model when the vehicle has an active air intake grille, and then the whole vehicle simulation model can be gridded to establish the vehicle's aerodynamic model. This reduces the workload in the modeling stage and improves the modeling efficiency of the vehicle's aerodynamic model, while helping to reduce the processing difficulty and amount of calculation in the subsequent gridding and simulation calculation process, thereby improving the efficiency of simulation analysis.

[0097] In some examples, the step of establishing an aerodynamic model of the vehicle based on the whole vehicle simulation model includes:

[0098] Meshing the whole vehicle simulation model to determine the vehicle mesh model;

[0099] Determine the mesh model as an aerodynamic model.

[0100] Specifically, in the process of establishing the aerodynamic model of the vehicle based on the whole vehicle simulation model, the whole vehicle simulation model can be gridded to obtain the grid model of the vehicle, and then the grid model is used as the aerodynamic model of the vehicle, so as to facilitate the import of the aerodynamic model into relevant simulation calculation software, and the setting of physical models and boundary conditions, and then the aerodynamic simulation analysis of the vehicle is carried out.

[0101] It can be understood that the aforementioned gridding processing can be carried out according to the relevant regulations and standards in the modeling standards of the aerodynamics of the whole vehicle; the aforementioned simulation calculation software can be existing commercial calculation software, such as STAR-CCM+, FLUENT and XFLOW, etc.; the aforementioned physical model and boundary conditions can be set according to the simulation analysis requirements, and no excessive restrictions are made here.

[0102] like Figure 3 As shown, according to the second aspect of the embodiment of the present application, a vehicle aerodynamic modeling device 300 is proposed, comprising:

[0103] A first acquisition module 301 is used to acquire CAS data and a chassis guard plate model of a vehicle;

[0104] A first determination module 302 is used to determine the presence information of the grille feature of the vehicle according to the CAS data;

[0105] The first processing module 303 is used to establish an external CAS model of the vehicle according to the CAS data when the vehicle does not have a grille feature or has an active air intake grille;

[0106] The second processing module 304 is used to establish an aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model.

[0107] In summary, the vehicle aerodynamic modeling device 300 provided in the embodiment of the present application can acquire the CAS data of the vehicle based on the current styling stage of the vehicle during the vehicle development process to determine the grille feature information of the vehicle, and then use the grille feature information of the vehicle to determine whether the vehicle has a grille feature at the current stage. If the vehicle does not have a grille feature or has an active air intake grille, it means that based on the styling of the vehicle at the current stage, the amount of gas that can enter the vehicle cabin is extremely small and can be ignored. Therefore, the external CAS model of the vehicle can be established according to the CAS data, and the chassis guard plate model of the vehicle is combined as the body of the vehicle to establish the aerodynamic model of the vehicle, so as to avoid modeling the areas and components with low impact on the aerodynamic performance of the vehicle, reduce the workload in the modeling stage, improve the modeling efficiency of the aerodynamic model of the vehicle, and help reduce the processing difficulty and calculation amount in the subsequent gridding processing and simulation calculation process, and improve the simulation analysis efficiency. At the same time, since the chassis guard plate is introduced into the aerodynamic model of the vehicle, the air flow characteristics of the bottom area of ​​the vehicle can be calculated and analyzed during the simulation analysis process, which provides a guarantee for the simulation analysis results to more realistically reflect the gas flow characteristics of the bottom area of ​​the vehicle, and helps to improve the authenticity and reliability of the simulation analysis results.

[0108] In some feasible examples, the second processing module 304 includes:

[0109] A first processing unit is used to connect the chassis guard plate model to the external CAS model according to the assembly position information of the chassis guard plate;

[0110] The second processing unit is used for performing Boolean operation on the chassis guard plate model and the external CAS model to determine the first model, so as to establish an aerodynamic model of the vehicle based on the first model.

[0111] In some feasible examples, the second processing module 304 further includes:

[0112] A first acquisition unit, used to acquire vehicle component information;

[0113] A first determining unit is used to determine the exposed component information of the vehicle according to the component information and the first model, where the exposed components at least include a wheel assembly, a wheel cover, a spoiler, and a battery pack;

[0114] A second acquisition unit is used to acquire an exposed component model according to the exposed component information;

[0115] a third processing unit, configured to connect the exposed component model to the first model according to the assembly position information of the exposed component;

[0116] The fourth processing unit is used for performing Boolean operation on the exposed component model and the first model to determine the second model, so as to establish an aerodynamic model of the vehicle based on the second model.

[0117] In some feasible examples, the second processing module 304 further includes:

[0118] A second determination unit, configured to determine that the second model is a whole vehicle simulation model when the vehicle does not have a grille feature;

[0119] The fifth processing unit is used to establish an aerodynamic model of the vehicle according to the whole vehicle simulation model.

[0120] In some feasible examples, the second processing module 304 further includes:

[0121] A third acquisition unit, configured to acquire a closed state model of the active air intake grille when the vehicle has the active air intake grille;

[0122] a sixth processing unit, configured to connect the closed state model to the second model according to the assembly position information of the active air intake grille;

[0123] The seventh processing unit is used to perform Boolean operation on the closed state model and the second model to determine a third model, so as to establish an aerodynamic model of the vehicle based on the third model.

[0124] In some feasible examples, the second processing module 304 further includes:

[0125] A third determining unit, configured to determine that the third model is a whole vehicle simulation model when the vehicle has an active air intake grille;

[0126] The eighth processing unit is used to establish an aerodynamic model of the vehicle according to the whole vehicle simulation model.

[0127] In some feasible examples, the fifth processing unit or the eighth processing unit includes:

[0128] A processing subunit, used for performing grid processing on the whole vehicle simulation model and determining the grid model of the vehicle;

[0129] Determine the sub-units used to determine the mesh model as an aerodynamic model.

[0130] According to a third aspect of an embodiment of the present application, a storage medium is proposed, the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the vehicle aerodynamic modeling method as described in any one of the first aspects above.

[0131] Since the storage medium provided in the embodiment of the present application is used to implement the vehicle aerodynamic modeling method proposed in any one of the first aspects above, it has all the beneficial effects of the vehicle aerodynamic modeling method proposed in any one of the first aspects above, which will not be repeated here.

[0132] like Figure 4 As shown, according to the fourth aspect of an embodiment of the present application, an electronic device 400 is proposed, and the electronic device 400 includes at least one processor 401 and at least one memory 402 connected to the processor 401, wherein the processor 401 is used to call program instructions in the memory 402 to execute a vehicle aerodynamic modeling method such as any one of the above-mentioned first aspects.

[0133] Since the electronic device 400 provided in the embodiment of the present application is used to implement the vehicle aerodynamic modeling method proposed in any one of the first aspects above, it has all the beneficial effects of the vehicle aerodynamic modeling method proposed in any one of the first aspects above, which will not be repeated here.

[0134] The present application is described with reference to the flowcharts and / or block diagrams of the methods, apparatuses, and electronic devices according to the embodiments of the present application; it should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions; these computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable process management device to generate a machine, so that the instructions executed by the processor of the computer or other programmable process management device generate instructions for implementing the process in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0135] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0136] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0137] In a typical configuration, an electronic device may include one or more processors (CPU), a memory, and a bus; the electronic device may also include an input / output interface, a network interface, and the like.

[0138] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip; the memory is an example of a storage medium.

[0139] Storage media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information; information can be computer-readable instructions, data structures, program modules or other data; examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device; as defined in this article, storage media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0140] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; it should be understood that the data used in this way can be interchangeable under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0141] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the order of the actions described, because according to the present application, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0142] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, product or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, product or apparatus; in the absence of further restrictions, the elements defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, product or apparatus that includes the elements.

[0143] Those skilled in the art should understand that the embodiments of the present application may be provided as methods, devices or electronic devices; therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects; moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0144] Computer program codes for performing operations of the embodiments of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Common Lisp, Python, C++, Objective-C, Smalltalk, Delphi, Java, Swift, C#, Perl, Ruby, JavaScript, and PHP, conventional procedural programming languages, such as Fortran, ALGOL, COBOL, PL / I, BASIC, Pascal, and C, and any other programming languages, such as Lisp, Tcl, Prolog, Visual Basic.NET, SQL, and R; the program codes may be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server; in the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (for example, via the Internet using an Internet service provider).

[0145] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of the claims of the present application.

Claims

1. A vehicle aerodynamic modeling method, characterized in that: include: Obtaining CAS data and chassis guard plate model of the vehicle; Determining grille feature information of the vehicle according to the CAS data; In a case where the vehicle does not have the grille feature or has an active air intake grille, establishing an external CAS model of the vehicle according to the CAS data; Establishing an aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model; The step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model comprises: Connecting the chassis guard plate model to the external CAS model according to the assembly position information of the chassis guard plate; performing a Boolean operation on the chassis guard plate model and the outer CAS model to determine a first model, so as to establish an aerodynamic model of the vehicle based on the first model; Obtaining component information of the vehicle; Determine, according to the component information and the first model, information of exposed components of the vehicle, wherein the exposed components at least include a wheel assembly, a wheel cover, a spoiler, and a battery pack; Acquire an exposed component model according to the exposed component information; Connecting the exposed component model to the first model according to assembly position information of the exposed component; A Boolean operation is performed on the exposed component model and the first model to determine a second model, so as to establish an aerodynamic model of the vehicle based on the second model.

2. The vehicle aerodynamic modeling method according to claim 1, characterized in that: The step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model further includes: In a case where the vehicle does not have the grille feature, determining that the second model is a whole vehicle simulation model; An aerodynamic model of the vehicle is established based on the whole vehicle simulation model.

3. The vehicle aerodynamic modeling method according to claim 1, characterized in that: The step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model further includes: In the case where the vehicle has an active air intake grille, obtaining a closed state model of the active air intake grille; connecting the closed state model to the second model according to the assembly position information of the active air intake grille; A Boolean operation is performed on the closed state model and the second model to determine a third model, so as to establish an aerodynamic model of the vehicle based on the third model.

4. The vehicle aerodynamic modeling method according to claim 3, characterized in that: The step of establishing the aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model further includes: In the case where the vehicle has an active air intake grille, determining that the third model is a whole vehicle simulation model; An aerodynamic model of the vehicle is established based on the whole vehicle simulation model.

5. The vehicle aerodynamic modeling method according to claim 2 or 4, characterized in that: The step of establishing the aerodynamic model of the vehicle according to the whole vehicle simulation model comprises: Performing grid processing on the whole vehicle simulation model to determine a grid model of the vehicle; The grid model is determined to be the aerodynamic model.

6. A vehicle aerodynamic modeling device, characterized in that: include: A first acquisition module, used for acquiring CAS data and a chassis guard plate model of the vehicle; A first determination module, configured to determine grille feature existence information of the vehicle according to the CAS data; A first processing module, configured to establish an external CAS model of the vehicle according to the CAS data when the vehicle does not have the grille feature or has an active air intake grille; A second processing module, for establishing an aerodynamic model of the vehicle according to the external CAS model and the chassis guard plate model; The second processing module comprises: A first processing unit, configured to connect the chassis guard plate model to the external CAS model according to the assembly position information of the chassis guard plate; a second processing unit, configured to perform a Boolean operation on the chassis guard plate model and the outer CAS model to determine a first model, so as to establish an aerodynamic model of the vehicle based on the first model; A first acquisition unit, used to acquire component information of the vehicle; A first determining unit, configured to determine exposed component information of the vehicle according to the component information and the first model, wherein the exposed components at least include a wheel assembly, a wheel cover, a spoiler, and a battery pack; A second acquisition unit, configured to acquire an exposed component model according to the exposed component information; a third processing unit, configured to connect the exposed component model to the first model according to assembly position information of the exposed component; A fourth processing unit is configured to perform a Boolean operation on the exposed component model and the first model to determine a second model, so as to establish an aerodynamic model of the vehicle based on the second model.

7. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the vehicle aerodynamic modeling method according to any one of claims 1 to 5.

8. An electronic device, characterized in that: The electronic device includes at least one processor and at least one memory connected to the processor, wherein the processor is used to call program instructions in the memory to execute the vehicle aerodynamic modeling method according to any one of claims 1 to 5.

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