关键词: 振动与波, 汽车NVH, 优化设计, 形貌优化, 模态分析

Abstract:

In order to improve the performance of noise, vibration & harshness (NVH) of a full vehicle, a structure optimization process is proposed, expecting to achieve a large improvement on NVH performance by making a minor modification to the vehicle. As an example, a commercial vehicle is used to perform this process. Initially, modal analysis, sensitivity analysis, panel acoustic contribution and structural - acoustic analysis, etc. are used to find parts which significantly affect vehicle NVH performance. In the second stage, according to different parts, the corresponding structure optimization method is proposed. Based on the structure analysis of the roof, a corresponding topology optimization solution is presented, by which the natural frequencies and the NVH performance of BIW can be improved.