固定管板式换热器应力的有限元分析  

Finite Element Analysis on Stress of Fixedtube Sheet Heat Exchanger

作　　者：贾慧灵[1] 杜鹏飞[2] 何江峰[1] 

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010 [2]内蒙古包头市交通运输管理处,内蒙古包头014010

出　　处：《煤矿机械》2009年第12期87-88,共2页Coal Mine Machinery

摘　　要：应用ANSYS有限元软件,建立了某固定管板式换热器的结构分析模型,对3种操作工况下换热器的应力场进行了计算,并校核了其中的危险工况。结果表明:受热载荷作用的换热器,最大应力在管板与管箱内壁面的过渡圆角处;"表皮效应"使距壳程侧2 mm处管板上的应力最大;换热器的各部件安全裕度均大于2,常规设计方法过于保守。A structural model of fixed tube-sheet heat exchanger is established by using the finite element software ANSYS. Stress distribution fields of the heat exchanger under three operating cases are calculated, and strength of the most dangerous case is checked. The results indicate that the maxium stress locates at the connecting fillet of tubesheet and tuhechannel. The stress is most in 2mmlayer of tubesheet on the shell side owing to ＂skin effect＂; and safety coefficients of parts are all larger than 2 so that normal design method is too conservative.

关 键 词：固定管板式换热器 有限元法 应力分析 

分 类 号：O242.21[理学—计算数学] TQ051.5[理学—数学]