某危险品运输车消声器热固耦合模态试验分析  

Thermal-Solid Coupling Modal Test Analysis of Muffler for a Dangerous Goods Transport Vehicle

作　　者：刘文瑜 罗卫东[1,2] LIU Wen-yu;LUO Wei-dong(School of Mechanical Engineering,Guizhou University,Guizhou Guiyang 550025,China;School of Mingde,Guizhou University,Guizhou Guiyang 550025,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]贵州大学明德学院,贵州贵阳550025

出　　处：《机械设计与制造》2022年第9期18-21,26,共5页Machinery Design & Manufacture

基　　金：贵州省科技支撑计划项目(黔科合支撑[2016]2319)。

摘　　要：材料的性能会随着温度的变化发生改变,探究消声器的结构性能应该考虑温度梯度的影响。针对某危险品运输车消声器,利用Fluent计算常速及高速工况下的温度场,并通过实验验证仿真的正确性,再把求解得到的温度场与消声器结构耦合,求解前8阶结构模态。结果表明仿真结果和实验结果趋势一致(高速整体偏差在2.09%,常速偏差在7.12%);常速、高速工况在温度梯度影响下的1阶模态固有频率分别为107.83Hz和107.5Hz,均不会与路面最大激励24.51Hz或发动机激励100Hz产生共振;消声器出口管和左侧壁面为薄弱点,最大变形量为60.8mm。The performance of the material will change with the change of temperature.When exploring the structural perfor⁃mance of the muffler,the effect of temperature gradient should be considered.In this paper,for a muffler of a dangerous goods ve⁃hicle,Fluent is used to calculate the temperature field under normal and high speed conditions,and the correctness of the simula⁃tion is verified through experiments.Then,the temperature field obtained is coupled with the structure of the muffler,and the first 8-order structural modes are solved.state.The results show that the simulation results and the experimental results have the same trend(the overall high-speed deviation is 2.09%and the constant-speed deviation is 7.12%);the natural frequencies of the firstorder modes under the influence of temperature gradients at normal and high-speed conditions are 107.83Hz and 107.5Hz.Will not cause resonance with the road maximum excitation of 24.51Hz or engine excitation of 100Hz;muffler outlet pipe and the left wall are weak points,the maximum deformation is 60.8mm.

关 键 词：危险品运输车 消声器 温度场 结构模态 共振 

分 类 号：TH16[机械工程—机械制造及自动化] TH69