某轿车排气系统振动分析

刘敬平;邓帮林;杜标;冯仁华;许胜利

振动与冲击 ›› 2011, Vol. 30 ›› Issue (8) : 237-242,.

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (8) : 237-242,.
论文

某轿车排气系统振动分析

  • 刘敬平1; 邓帮林1; 杜标1; 冯仁华1; 许胜利2
作者信息 +

Vbration analysis on car's exhaust system

  • Liu Jingping1; Deng Banglin1; Du Biao1; Feng Renhua1; Xu Sheng-li2
Author information +
文章历史 +

摘要

联合有限元软件与AVL-Excite软件,对某轿车排气系统进行模态与强迫振动分析。首先利用有限元软件对排气系统做自由模态分析,初步分析其吊耳点布置合理与否。然后利用有限元软件对排气系统进行自由度缩减,提取其质量矩阵、刚度矩阵、主节点自由度信息及模态信息,整合到内燃机-排气系统多体动力学模型中,对排气系统进行受迫振动分析,充分考虑其弹性变形与模态共振对振动响应的影响。得出排气系统任一点上的振动响应及排气管路长度上的振动传递率,考察其振动耦合特性;为排气系统的空间走向和结构设计提供强有力的依据。

Abstract

A modal and forced vibration analysis of the exhaust system of a car is carried out by using of Finite element software and AVL-Excite. First, a free modal analysis on the exhaust system is carried out by using of Finite element software; a preliminary analysis of reasonableness of the drop zone layout of the exhaust system is carried out. Then the Finite element software is used to reduce degrees of freedom, to extract the mass matrix, stiffness matrix, the main node degree of freedom of information and mode information of the exhaust system, and integrate these into the internal combustion engine - the exhaust system multi-body dynamic model, carry out the forced vibration analysis of the exhaust system, the impaction of the elastic deformation and modal resonance on vibration is fully considered. Vibration at any point of the exhaust system and the vibration transmissibility on the length of exhaust pipe is obtained, and its vibration coupling characteristics is studied; then a strong basis for space direction and structural design of the exhaust system can be provide.

关键词

排气系统 / 模态 / 振动 / AVL-Excite

Key words

Exhaust system / mode / vibration / AVL-Excite

引用本文

导出引用
刘敬平;邓帮林;杜标;冯仁华;许胜利. 某轿车排气系统振动分析[J]. 振动与冲击, 2011, 30(8): 237-242,
Liu Jingping;Deng Banglin;Du Biao;Feng Renhua;Xu Sheng-li. Vbration analysis on car's exhaust system[J]. Journal of Vibration and Shock, 2011, 30(8): 237-242,

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