Automobile damping patch position optimization method and system

Abstract

The invention discloses an automobile damping patch position optimization method and system, and the method comprises the steps: building a finite element model of a white automobile body, carrying out the targeted damping optimization and sensitivity analysis of a risk frequency through the combined use of an effective sound power analysis method and a modal synthesis method, carrying out the sensitivity analysis of a confirmed damping fin, finding a position with high sensitivity according to a sensitivity analysis result to carry out damping fin preliminary arrangement design, finally performing Trimbody noise transfer function analysis on a potential damping fin, and after the damping fin is added, providing an obvious scheme for optimizing the right ear response of a driver. Accordingto the method, the development time can be shortened, the research and development cost can be reduced, the noise and vibration performance of the whole vehicle can be improved, the sensitivity of scientifically and accurately recognizing the damping fin is high, and the peak value with potential design risks is enhanced in a targeted mode.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a method and system for optimizing the position of an automobile damping patch. Background technique [0002] With the rapid development of science and technology, consumers have higher and higher requirements for automobile quality, especially the vibration and noise performance, which has attracted more and more attention. Among them, the damping sheet, one of the measures to improve vibration and noise, is more and more used in the field of automobile NVH. widely. [0003] In the pre-development process of automobiles, due to various reasons such as structure, cost, and cycle, CAE intervention in the early stage is required to provide more accurate position analysis. Many OEMs use the frequency response method, which is based on the analysis of the body-in-white. The large sheet metal of the car body is divided into many small pieces, the excitation is applied to the key poi...

AI Technical Summary

Problems solved by technology

[0003] In the pre-development process of automobiles, due to various reasons such as structure, cost, and cycle, CAE intervention in the early stage is required to provide more accurate position analysis. Many OEMs use the frequency response method, which is based on the analysis of the body-in-white. The large sheet metal of the car body is divided into many small pieces, the excitation is applied to the key points of the chassis, and the relatively weak area of ​​the car body structure is obtained through the statistical analysis of the response results. Compared with the test data, the error control is insufficient, the optimization frequency is not targeted, and the results can only be verified by various schemes on real vehicles. The support for real vehicle problems is not ideal, and it cannot well support the optimization and improvement of the position of the damping plate. Therefore, it is necessary Design a method and system for optimizing the position of automobile damping patches to solve the above technical problems

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