压力容器2013，Vol.30Issue(2)：54-58,5.DOI:10.3969/j.issn.1001-4837.2013.02.009
多点约束(MPC)法与换热器整体有限元分析
Multipoint Constraint Method and Finite Element Analysis of Whole Heat Echangers
摘要
Abstract
In a shell -and -tube heat exchanger,the thickness of the tubesheet and the flange is usually much greater than that of the cylinder and tubes. For a large heat exchanger there may be thousands of tubes. It is hard to carry out the finite element analysis by establishing the whole model when using solid elements only. On the other hand, since the cylinder and tubes are of the characteristics of shell structure, it is easier to model the cylinder and tubes with shell elements. However,as the nodal freedoms of the solid element and shell element are different, they cannot be connected to each other directly. Multipoint constraint (MPC) method is a new way to solve this problem by establishing constraint equations at the connecting surface between different elements. Two finite element models are established for a fixed shell - and - tube heat exchanger. One is using MPC method coupling shell and solid elements and another is using solid elements only. The two models are compared in terms of stress intensity factors at the tubesheet and the cylinder. Results show MPC method is effective in the finite element analysis for the whole structure of a heat exchanger.关键词
有限元/多点约束/固定管板式换热器/应力强度Key words
finite element method/multipoint constraint( MPC)/fixed shell - and - tube heat exchanger/stress intensity分类
机械制造引用本文复制引用
曲晓锐,钱才富..多点约束(MPC)法与换热器整体有限元分析[J].压力容器,2013,30(2):54-58,5.基金项目
中国石油化工股份有限公司资助项目(项目名称:新型高效换热器研制及应用 （）
合同编号:308036) （）
