基于ANSYS的换热器管板应力评定  

Stress Assessment of Heat Exchanger Tube Sheet Based on ANSYS

作　　者：王战辉[1,2] 马向荣 范晓勇[1,2] 高勇 WANG Zhanhui;MA Xiangrong;FAN Xiaoyong;GAO Yong(School of Chemistry and Chemical Engineering, Yulin University, Yulin, Shaanxi 719000, China;Shannxi Key Laboratory of Low Metamorphic Coal Clean Utilization, Yulin, Shaanxi 719000, China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]陕西省低变质煤洁净利用重点实验室,陕西榆林719000

出　　处：《轻工机械》2019年第4期100-104,共5页Light Industry Machinery

基　　金：国家自然科学基金项目(51762042);陕西省教育厅专项科学研究计划项目(17JK0901);陕西省教育厅重点科学研究计划(重点实验室)(19JS069)

摘　　要：针对换热器管板受力情况复杂,传统的理论方法难以计算其内部应力分布的现象。借助ANSYS有限元分析软件,以管程、壳程同时开的瞬间工况和正常操作的稳态工况为研究对象,考察其等效应力分布规律;并对其进行应力评定。结果表明:远离换热管和管板的连接区域,等效应力呈均匀分布,为薄膜应力;最大等效应力出现在换热管外表面和管板与壳体的连接处;温度变化明显的地方,热应力也相对较大;对7种工况进行应力评定,针对危险工况,进行改进,效果明显。研究结果对于管板的安全可靠运行提供一定的技术保障。In view of complex stress situation of heat exchanger tube sheet,it is difficult to calculate internal stress distribution by traditional theoretical methods. With the help of ANSYS finite element analysis software,instantaneous working condition of both tube and shell side and steady working condition of normal operation were taken as research objects,and the distribution law of equivalent stress was investigated,and the stress was evaluated. The results show that the equivalent stress distributes evenly away from junction area of heat exchanger tube and tube sheet,and is thin film stress;the maximum equivalent stress occurs on the outer surface of heat exchanger tube and junction between tube sheet and shell;where temperature changes obviously,thermal stress is relatively large;stress assessment is carried out for seven working conditions,and for dangerous working conditions,the maximum equivalent stress occurs on outer surface of heat exchanger tube and junction between tube sheet and the result is obvious. The research results provide certain technical guarantee for safe and reliable operation of tube sheet.

关 键 词：换热器 应力评定 管板 ANSYS软件 等效应力 

分 类 号：TQ051.5[化学工程]