摘要
以凸形封头中的球形封头、椭圆形封头和无折边球形封头为研究对象,利用ANSYS有限元分析软件建立封头厚度大于筒体厚度中心线偏移和不偏移两种连接方式的有限元模型,并进行应力分析。结果表明:(1)最大等效应力发生在筒体和封头过渡区域附近,是由筒体和封头几何形状发生突变所引起的;(2)两种结构形式中,中心线偏移下等效应力最大,容易发生强度失效;(3)当球形封头削边长度L为47.575 mm时,标准椭圆封头的削边长度L为45.086 mm时,无折边球形封头的削边长度L为47.684 mm时,总体应力集中系数达到最小。
In this article,the author takes spherical heads,elliptical heads and dished head without skirt as the study objects and using ANSYS finite element analysis software to establish two models,in which one with offset center line and one without but both with greater thickness of the head than that of cylinder.It was shown from that:The maximum equivalent stress occurs near the transition between cylinder and head,which is caused by the sudden change of geometry;In the two models,the one with offset centerline has the largest equivalent stress and is easy to fail in strength.With the lengths of taped flange L of 47.575,45.086 and 47.684 for the spherical head,standard elliptical head and the dished without skirt respectively,the overall stress concentration factors for these three kind of heads reach the minimum.
作者
王战辉
张智芳
范晓勇
高勇
Wang Zhanhui;Zhang Zhifang;Fan Xiaoyong;Gao Yong(School of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,China;Key Laboratory of Low Metamorphic Coal Clean Utilization,Yulin 719000,China)
出处
《化工设备与管道》
CAS
北大核心
2021年第1期16-19,33,共5页
Process Equipment & Piping
基金
国家自然科学基金项目(21763030)
陕西省创新能力支撑计划(2020TD-032)
陕西省教育厅重点科学研究计划(重点实验室)(19JS069)。
