NVH analysis method based on super-element and finite element hybrid model

Abstract

The invention discloses an NVH analysis method based on a super-element and finite element hybrid model. The method comprises: establishing a whole vehicle finite element model, condensing part of finite element sub-module models in the finished automobile finite element model into independent super-unit sub-module models through a modal synthesis method, establishing a whole vehicle hybrid modelcomposed of a super-unit sub-module model and a finite element sub-module model, and performing NVH simulation analysis by using the vehicle hybrid model. According to the method, the repeated calculation times and time of the finite element submodule are reduced without changing in analysis, and the more the repeated calculation times are, the more obvious the advantage of saving time is, so thatthe calculation speed is obviously increased; and meanwhile, the storage space occupied by the process file and the calculation result is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to an NVH analysis method based on a hybrid model of a superelement and a finite element. Background technique [0002] In the increasingly competitive automobile market, with the continuous improvement of people's requirements for driving comfort, the NVH performance of the vehicle has become one of the product performances that consumers are most concerned about. Controlling the NVH performance of the vehicle through CAE simulation technology in the early stage of design is an effective means to solve the NVH problem of the vehicle and improve product quality. Carrying out the virtual prototype vehicle verification work before the real vehicle test can reduce the number of rectification problems in the later stage and shorten the product development cycle. [0003] The traditional NVH simulation analysis method is to establish a finite element model of the vehicle...

AI Technical Summary

Problems solved by technology

However, the NVH performance of the whole vehicle often needs to go through multiple rounds of optimization iterations to achieve the design goal, which may lead to the analysis of the NVH performance of each data node for several weeks, the calculation efficiency is too low and the waste of computing resources , it is difficult to guarantee that the project will proceed normally according to the node time

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