汽车消声器模态分析及优化

Automotive Muffler Modal Analysis and Optimization

摘要: 主要工作是为了分析研究汽车消声器振动的固有振动频率范围以及其振动频率特性，首先尝试在SolidWorks系统中建立一个消声器振的线性几何模型；再然后通过将其直接导入到计算机ABAQUS系统中对系统进行的有限元数值分析，进行了约束和模态的分析，求得汽车消声器共振的前后6个阶的固有振幅频率，并由此对前后每个阶共振的基本振型特征进行了量化描述；最后，在能够保证现有消声器性能结构与技术参数性能不变的前提情况下，对国内现有产品的消声器结构提出来了以下几种优化的设计和结构建议并分别进行对比分析。

Abstract: In order to analyze and study the inherent vibration frequency range of automobile muffler vibra-tion and its vibration frequency characteristics, we firstly tried to establish a linear geometric mod-el of muffler vibration in SolidWorks system; then, by importing it directly into the computer ABAQUS system for the finite element numerical analysis of the system, we carried out the analysis of constraints and modalities to find the resonance frequency of automobile muffler. Finally, on the premise that the performance structure and technical parameters of existing mufflers remain un-changed, the following optimized design and structure suggestions are made for the muffler struc-ture of existing domestic products, and comparative analysis is carried out respectively.