CN117408028A - Automobile road noise CAE analysis method based on virtual road surface - Google Patents
Automobile road noise CAE analysis method based on virtual road surface Download PDFInfo
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Abstract
The invention relates to the technical field of automobile NVH (noise and harshness), and discloses an automobile road noise CAE (computer aided engineering) analysis method based on a virtual road surface.
Description
Technical Field
The invention relates to the technical field of automobile NVH, in particular to an automobile road noise CAE analysis method based on a virtual road surface.
Background
NVH is an English abbreviation of noise, vibration and sound vibration roughness, is a comprehensive problem for measuring automobile manufacturing quality, is the most direct and superficial to automobile users, is one of problems concerned by all large-vehicle manufacturing enterprises and part enterprises in the International automobile industry, has statistical data, shows that about 1/3 of the problem of faults of the whole vehicle is related to the NVH problem of the vehicle, and about 20% of research and development cost of all large-vehicle enterprises is consumed in solving the NVH problem of the vehicle, and has the advantages that the typical performance problem of a designed automobile model can be rapidly checked and the optimization direction can be found in the whole-vehicle product development process, the sample manufacturing and sample testing turn is reduced, the development cost is saved, the development efficiency is improved, however, the reliability of the optimization result obtained through CAE depends on the reliability of the initial simulation result, and the sample testing result can be matched as much as possible.
The application number 202110455818.2 discloses a whole vehicle road noise simulation standard-alignment method based on a virtual road surface, and the problems in the background technology are as follows: when the road vibration noise problem is analyzed based on the virtual road surface technology, because the digital road surface and the complex tire model are introduced on the basis of the whole vehicle acoustic-solid coupling model, and meanwhile, the random vibration analysis theory is adopted, the accumulated error in the simulation calculation is amplified, and the distortion degree of the simulation result is increased, but when the whole vehicle road noise simulation is carried out, a plurality of groups of whole vehicle road noise simulation results cannot be analyzed by a comparison method, so that the distortion degree of the simulation result cannot be obtained through the change condition of the plurality of groups of whole vehicle road noise simulation results, and certain defects exist.
Disclosure of Invention
The invention aims to provide an automobile road noise CAE analysis method based on a virtual road surface, which aims to solve the problems that when the whole automobile road noise simulation is carried out in the background technology, multiple groups of whole automobile road noise simulation results cannot be analyzed by a comparison method, so that the distortion degree of the simulation results cannot be obtained through the change condition of the multiple groups of whole automobile road noise simulation results, and certain defects exist.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a CAE analysis method for automobile road noise based on virtual road surface comprises the following steps;
s1: determining information of suspension parameters, vehicle model parameters, vehicle body parameters and virtual pavement parameters of the vehicle power assembly;
s2: the method comprises the steps that (1) after parameters are determined in the step (1), the virtual road surface of an integrated whole vehicle of a suspension, a vehicle model and a vehicle body of the vehicle subjected to parameter determination in the step (1) is subjected to standard matching simulation, and multiple groups of standard matching simulation are completed;
s3: adjusting parameters of the virtual pavement, and immediately enabling the automobile power assembly suspension, the automobile model and the integrated whole automobile of the automobile body after the parameters are determined in the step S1 to perform standard alignment simulation on the virtual pavement after the parameters are adjusted, and completing multiple groups of standard alignment simulation;
s4: adjusting parameters of the automobile power assembly suspension, the automobile model and the automobile body, and immediately enabling the automobile power assembly suspension, the automobile model and the automobile body with the parameters adjusted to perform standard alignment simulation on the virtual pavement in the step S1, and completing multiple groups of standard alignment simulation;
s5: the standard simulation data of the step S2, the step S3 and the step S4 are collected, and the collected data are transmitted and processed independently to obtain the road noise simulation results of the whole automobile of the step S2, the step S3 and the step S4;
s6: on the basis of the step S5, the road noise simulation results of the whole automobile obtained in the steps S2, S3 and S4 are compared;
s7: and (3) overall analysis is carried out on the novel data obtained in the step (S5) and the step (S6) to obtain the road noise simulation result of the final whole automobile.
By adopting the technical scheme; and (3) adjusting parameters of different automobile power assemblies, automobile types and automobile bodies at a certain time when the parameters of the virtual pavement model are determined, and performing multi-group simulation, or otherwise, adjusting the parameters of the virtual pavement model at a certain time when the parameters of the automobile power assemblies, the automobile types and the automobile bodies are determined, so as to form comparative simulation, grasp data changes of the multi-group simulation, and obtain whether the data changes and actual conditions are abnormal, thereby improving the authenticity of the simulation, ensuring the validity of road noise NVH problem investigation and the correctness of the optimization direction, saving the development funds and time cost of the automobile types, and shortening the research and development period.
Preferably, the suspension of the automobile power assembly in the step S1 includes the power assembly of the automobile, the suspension of the automobile and the like, the automobile model in the step S1 includes the automobile models such as sedan, SUV and MPV, and the automobile body model in the step S1 includes the streamline design and the rigidity structure of the automobile and the like.
By adopting the technical scheme; the actual situation is attached by setting information such as different vehicle types, vehicle body situations and configuration of the automobile.
Preferably, the virtual road surface model in the step S1 includes road surfaces with different roughness, and includes wind noise, tire noise, and the like.
By adopting the technical scheme; the simulation of the vehicle noise of the whole vehicle is carried out on the road surfaces with different roughness, and the reality of the simulation is further improved through the cooperation of wind noise and tire noise.
Preferably, when the road noise simulation of the whole vehicle is performed in step S2, step S3 and step S4, the motion state of the whole vehicle such as speed, acceleration, steering and deceleration is changed through the motion model system, so that the simulation of the whole vehicle is performed in multiple motion states during the road noise simulation.
By adopting the technical scheme; the real operation of the automobile in the driving process is simulated, so that the road noise conditions of the automobile in different motion states are simulated.
Preferably, the comparison processing in the step S6 is to perform comprehensive comparison processing on the simulation results of the step S2, the step S3 and the step S4 and perform comparison processing on multiple groups of simulation results in the step S2, the step S3 and the step S4, specifically;
when the parameters of the virtual pavement model are determined at a certain time, different automobile power assembly suspension, automobile model and automobile body parameters are adjusted, multiple groups of simulation are carried out, and the change trend of multiple groups of simulation results is obtained;
or otherwise, when the parameters of the suspension of the automobile power assembly, the automobile model and the automobile body are determined to be certain, the parameters of the virtual pavement model are adjusted, and multiple groups of simulation are performed to obtain the change trend of multiple groups of simulation results.
By adopting the technical scheme; the simulation is contrasted, so that the data change of multiple groups of simulation is mastered, whether the data change and the actual situation are abnormal or not is obtained, the authenticity of the simulation is improved, the effectiveness of road noise NVH problem investigation and the correctness of the optimization direction are ensured, the development fund and time cost of a vehicle model are saved, and the research and development period is shortened.
Preferably, the step S3 and the step S4 are adjustable proportionally when parameters of the virtual road surface, the suspension of the vehicle powertrain, the vehicle model and the vehicle body are adjusted.
By adopting the technical scheme; the data obtained by the comparison processing is convenient to analyze through proportional adjustment, and whether the data is abnormal or not is convenient to grasp.
Preferably, the transmission mode of the collected information in step S5 includes wired transmission or wireless transmission.
By adopting the technical scheme; the acquired information is transmitted in various modes, so that the stability and the efficiency of information transmission are ensured.
Preferably, in the step S7, after the road noise simulation result of the final whole automobile is obtained, the result is feedback displayed and stored.
By adopting the technical scheme; the feedback display is convenient for staff to master, and the result is kept with files through storage, so that the long-term use is convenient.
Compared with the prior art, the invention provides the car road noise CAE analysis method based on the virtual road surface, which has the following beneficial effects:
according to the invention, when the parameters of the virtual pavement model are determined to be definite, different automobile power assembly suspension, automobile model and automobile body parameters are adjusted to perform multi-group simulation, or conversely, when the parameters of the automobile power assembly suspension, the automobile model and the automobile body are determined to be definite, the parameters of the virtual pavement model are adjusted to perform multi-group simulation, so that the comparison simulation is formed, the data change of the multi-group simulation is mastered, whether the data change and the actual situation are abnormal or not is obtained, the authenticity of the simulation is improved, the validity of NVH problem investigation and the correctness of the optimization direction are ensured, and the development funds and the time cost of the automobile model are saved.
Drawings
Fig. 1 is a schematic flow chart of an automobile road noise CAE analysis method based on a virtual road surface.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples are given; referring to fig. 1, an automobile road noise CAE analysis method based on a virtual road surface includes the following steps:
s1: determining information of suspension parameters, vehicle model parameters, vehicle body parameters and virtual pavement parameters of the vehicle power assembly;
s2: the method comprises the steps that (1) after parameters are determined in the step (1), the virtual road surface of an integrated whole vehicle of a suspension, a vehicle model and a vehicle body of the vehicle subjected to parameter determination in the step (1) is subjected to standard matching simulation, and multiple groups of standard matching simulation are completed;
s3: adjusting parameters of the virtual pavement, and immediately enabling the automobile power assembly suspension, the automobile model and the integrated whole automobile of the automobile body after the parameters are determined in the step S1 to perform standard alignment simulation on the virtual pavement after the parameters are adjusted, and completing multiple groups of standard alignment simulation;
s4: adjusting parameters of the automobile power assembly suspension, the automobile model and the automobile body, and immediately enabling the automobile power assembly suspension, the automobile model and the automobile body with the parameters adjusted to perform standard alignment simulation on the virtual pavement in the step S1, and completing multiple groups of standard alignment simulation;
s5: the standard simulation data of the step S2, the step S3 and the step S4 are collected, and the collected data are transmitted and processed independently to obtain the road noise simulation results of the whole automobile of the step S2, the step S3 and the step S4;
s6: on the basis of the step S5, the road noise simulation results of the whole automobile obtained in the steps S2, S3 and S4 are compared;
s7: and (3) overall analysis is carried out on the novel data obtained in the step (S5) and the step (S6) to obtain the road noise simulation result of the final whole automobile.
And (3) adjusting parameters of different automobile power assemblies, automobile types and automobile bodies at a certain time when the parameters of the virtual pavement model are determined, and performing multi-group simulation, or otherwise, adjusting the parameters of the virtual pavement model at a certain time when the parameters of the automobile power assemblies, the automobile types and the automobile bodies are determined, so as to form comparative simulation, grasp data changes of the multi-group simulation, and obtain whether the data changes and actual conditions are abnormal, thereby improving the authenticity of the simulation, ensuring the validity of road noise NVH problem investigation and the correctness of the optimization direction, saving the development funds and time cost of the automobile types, and shortening the research and development period.
Further, the suspension of the automobile power assembly in the step S1 comprises the automobile power assembly, the automobile suspension and the like, the automobile types in the step S1 comprise sedan, SUV, MPV and other automobile types, the automobile body model in the step S1 comprises streamline design, rigidity structure and the like of the automobile, and the actual situation is attached by setting information of different automobile types, automobile body situations, configuration and the like of the automobile.
Further, the virtual pavement model in the step S1 includes pavement with different roughness, wind noise, tire noise and the like, and the reality of the simulation is further improved by enabling the pavement with different roughness to perform the whole vehicle noise simulation and matching the wind noise with the tire noise.
Further, when the road noise simulation of the whole vehicle is performed in step S2, step S3 and step S4, the motion states of the whole vehicle such as speed, acceleration, steering and deceleration are changed through the motion model system, so that the whole vehicle is simulated in multiple motion states during the road noise simulation, the real operation of the vehicle during the driving process is simulated, and the road noise conditions of the vehicle under different motion states are simulated.
Further, the comparison processing in the step S6 is to perform comprehensive comparison processing on the simulation results of the step S2, the step S3 and the step S4 and perform comparison processing on a plurality of groups of simulation results in the step S2, the step S3 and the step S4, specifically;
when the parameters of the virtual pavement model are determined at a certain time, different automobile power assembly suspension, automobile model and automobile body parameters are adjusted, multiple groups of simulation are carried out, and the change trend of multiple groups of simulation results is obtained;
or otherwise, when the parameters of the suspension of the automobile power assembly, the automobile model and the automobile body are determined to be certain, the parameters of the virtual pavement model are adjusted, and multiple groups of simulation are performed to obtain the change trend of multiple groups of simulation results.
The simulation is contrasted, so that the data change of multiple groups of simulation is mastered, whether the data change and the actual situation are abnormal or not is obtained, the authenticity of the simulation is improved, the effectiveness of road noise NVH problem investigation and the correctness of the optimization direction are ensured, the development fund and time cost of a vehicle model are saved, and the research and development period is shortened.
Further, the step S3 and the step S4 can be adjusted in proportion when parameters of the virtual road surface, the suspension of the automobile power assembly, the automobile model and the automobile body are adjusted, and the data obtained by the comparison processing can be analyzed conveniently through the proportional adjustment, so that whether the data is abnormal or not can be mastered conveniently.
Further, the transmission mode of the collected information in step S5 includes wired transmission or wireless transmission, and the collected information is transmitted in various modes, so that the stability and efficiency of information transmission are ensured.
Further, after the road noise simulation result of the final whole automobile is obtained in the step S7, the result is fed back, displayed and stored, the result is convenient for staff to master through the feedback display, and files are reserved through the storage, so that the long-term use is convenient.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The car road noise CAE analysis method based on the virtual road surface is characterized by comprising the following steps of:
s1: determining information of suspension parameters, vehicle model parameters, vehicle body parameters and virtual pavement parameters of the vehicle power assembly;
s2: the method comprises the steps that (1) after parameters are determined in the step (1), the virtual road surface of an integrated whole vehicle of a suspension, a vehicle model and a vehicle body of the vehicle subjected to parameter determination in the step (1) is subjected to standard matching simulation, and multiple groups of standard matching simulation are completed;
s3: adjusting parameters of the virtual pavement, and immediately enabling the automobile power assembly suspension, the automobile model and the integrated whole automobile of the automobile body after the parameters are determined in the step S1 to perform standard alignment simulation on the virtual pavement after the parameters are adjusted, and completing multiple groups of standard alignment simulation;
s4: adjusting parameters of the automobile power assembly suspension, the automobile model and the automobile body, and immediately enabling the automobile power assembly suspension, the automobile model and the automobile body with the parameters adjusted to perform standard alignment simulation on the virtual pavement in the step S1, and completing multiple groups of standard alignment simulation;
s5: the standard simulation data of the step S2, the step S3 and the step S4 are collected, and the collected data are transmitted and processed independently to obtain the road noise simulation results of the whole automobile of the step S2, the step S3 and the step S4;
s6: on the basis of the step S5, the road noise simulation results of the whole automobile obtained in the steps S2, S3 and S4 are compared;
s7: and (3) overall analysis is carried out on the novel data obtained in the step (S5) and the step (S6) to obtain the road noise simulation result of the final whole automobile.
2. The method for analyzing the road noise CAE of the automobile based on the virtual road surface according to claim 1, wherein the method comprises the following steps: the automobile power assembly suspension in the step S1 comprises an automobile power assembly, an automobile suspension and the like, the automobile model in the step S1 comprises a sedan, an SUV, an MPV and the like, and the automobile body model in the step S1 comprises a streamline design, a rigidity structure and the like of the automobile.
3. The method for analyzing the road noise CAE of the automobile based on the virtual road surface according to claim 1, wherein the method comprises the following steps: the virtual road surface model in the step S1 includes road surfaces with different roughness, and includes wind noise, tire noise, and the like.
4. The method for analyzing the road noise CAE of the automobile based on the virtual road surface according to claim 1, wherein the method comprises the following steps: when the road noise simulation of the whole vehicle is carried out in the step S2, the step S3 and the step S4, the motion state of the whole vehicle such as speed, acceleration, steering, deceleration and the like is changed through the motion model system, so that the simulation is carried out in multiple motion states when the road noise simulation of the whole vehicle is carried out.
5. The method for analyzing the road noise CAE of the automobile based on the virtual road surface according to claim 1, wherein the method comprises the following steps: the comparison processing in the step S6 is to perform comprehensive comparison processing on the simulation results of the step S2, the step S3 and the step S4 and perform comparison processing on a plurality of groups of simulation results of the step S2, the step S3 and the step S4, specifically;
when the parameters of the virtual pavement model are determined at a certain time, different automobile power assembly suspension, automobile model and automobile body parameters are adjusted, multiple groups of simulation are carried out, and the change trend of multiple groups of simulation results is obtained;
or otherwise, when the parameters of the suspension of the automobile power assembly, the automobile model and the automobile body are determined to be certain, the parameters of the virtual pavement model are adjusted, and multiple groups of simulation are performed to obtain the change trend of multiple groups of simulation results.
6. The method for analyzing the road noise CAE of the automobile based on the virtual road surface according to claim 1, wherein the method comprises the following steps: the step S3 and the step S4 can be adjusted in proportion when parameters of the virtual pavement, the suspension of the automobile power assembly, the automobile model and the automobile body are adjusted.
7. The method for analyzing the road noise CAE of the automobile based on the virtual road surface according to claim 1, wherein the method comprises the following steps: the transmission mode of the collected information in step S5 includes wired transmission or wireless transmission.
8. The method for analyzing the road noise CAE of the automobile based on the virtual road surface according to claim 1, wherein the method comprises the following steps: and step S7, after the road noise simulation result of the final whole automobile is obtained, the result is fed back, displayed and stored.
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