管壳式热交换器扇环形管板开孔应力集中系数分析  

Stress Concentration Factor Analysis of Openings on an Annular Sector Tube Sheets Used in a Shell and Tube Heat Exchanger

作　　者：刘庆刚[1] 刘玻江 朱海荣[1] 杨亚慧[1] 于新奇[1] 

机构地区：[1]河北科技大学机械工程学院,河北石家庄050018

出　　处：《石油化工设备》2018年第1期20-25,共6页Petro-Chemical Equipment

基　　金：河北省教育厅重点项目(ZD2017028)

摘　　要：大直径的管壳式热交换器计算管板厚度数值较大,给设计和制造带来困难。提出了一种利用n个扇环形管板组合成一个整体圆形管板来替代常规厚管板的设计思路。每一个扇环形管板单元的当量几何尺寸较小,这种组合圆形管板可以减小管板的厚度,达到降低制造难度的目的。采用ANSYS Workbench对不同结构参数的扇环形管板单元进行了开孔引起应力集中的分析,模拟计算结果表明,当内、外半径比为0.5、扇形角为40°~45°时,应力集中最小。The thickness of the tube sheet used in a large shell and tube heat exchanger is also large,so the design and manufacturing will be also much more difficult.A combined tube sheet including agroup of annular sector tube sheet units was developed to replace the entire circular tube sheet aiming at reducing the thickness of the tube sheet with considoration of the smaller equivalent geometry size of the annular sector tube sheet units.The software ANSYS Workbench was used to analyze the stress concentration conditions around the openings on the annular sector tube sheet units and the relationship between the sector angels and the stress concentration factors was investigated according to the result of the analysis.It is indicated that while the ratio of the inner radius and the outer radius is 0.5 and the sector angel is between 40°~ 45°,the stress concentration factor will get the minimum.That is,in the design of a combined tube sheet,the ratio of the inner radius and the outer radius should be 0.5,and the sector angel should be between 40°~45°.

关 键 词：管壳式热交换器 扇环形组合管板 应力集中系数 有限元分析 

分 类 号：TQ050.2[化学工程] TB115.1[理学—数学]