基于Abaqus的某发动机排气管有限元分析  

The Finite Element Analysis on an Engine Exhaust Pipe based on Abaqus

作　　者：刘春朝 周超宇[2] 王涛卫 张飞[2] 刘洋[2] 蒙舒祺 LIU Chunchao;ZHOU Chaoyu;WANG Taowei;ZHANG Fei;LIU Yang;MENG Shuqi(Shantui Construction Machinery Co.,Ltd., Jining 272073, China;School ol Energy and Power Engineering,Shandong University,Jinan 250061, China)

机构地区：[1]山推工程机械有限公司,山东济宁272073 [2]山东大学能源与动力工程学院,山东济南250061

出　　处：《内燃机与动力装置》2017年第6期26-29,共4页Internal Combustion Engine & Powerplant

基　　金：山东省科技发展计划项目(2015GGX106004)

摘　　要：以某发动机排气管为研究对象,建立排气管的有限元模型,并将其离散成具有多自由度的系统,利用Abaqus软件对其进行约束模态分析,得到其振动频率和固有振型;建立排气管固体、管内烟气流场与外部空气流场的对流换热模型,通过Fluent软件模拟排气管的内外流场情况,分析三元催化转化器总成内部流场分布情况;并将计算结果映射到ABAQUS中进行流固耦合计算,得到排气管的温度场及热应力分布情况。计算所得结果对排气管的数值模拟计算和生产设计有着重要的参考意义。A certain type ol exhaust pipe was taken as the research object.The finite element model ol the exhaust pipe was established,and the model was divided into a multi-degree-lreedom system. Abaqus software was used to carry out a modal analysis,and the vibration frequency as well as natural vibration model ol the finite element model were obtained.The model ol the gas exhaust pipe, internal exhaust air and external cold air was established. The inner and outer llow lields ol the exhaust pipe was simulated by the Fluent soltware, and the distribution ol inner llow lield on the three way catalytic converter was analyzed. Then the calculation results were mapped to the Abaqus soltware to carry out the lluid-solid coupling analysis and the temperature and stress distribution ol gas exhaust pipe were obtained. The calculation result has a value on simulation calculation and pro-duction design ol the exhaust pipe.

关 键 词：排气管 模态计算 流固耦合 热应力 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]