反应釜夹套封口锥和凹口锥翻边结构的应力分析和优化设计

Stress Analysis and Optimum Design for Sealed Cone and Notched Cone at Flanged Structure of Jacket in Reacting Vessel

基于有限元法,对某一反应釜夹套封口锥和凹口锥翻边结构总体不连续的高应力区进行了应力分析并探讨了翻边角度对薄膜应力、弯曲应力、峰值应力及最大总应力的影响规律和原因,得出以下结论并给出建议性的优化翻边角度:封口锥翻边结构高应力区的最大应力受弯曲应力决定,且随翻边角度的增大而显著增大;凹口锥翻边结构高应力区的最大应力受薄膜应力和弯曲应力共同决定,且随翻边角度的增大而逐渐减小;封口锥翻边角度建议优先选用30°,受力状态相对优越且应力值较小;凹口锥翻边角度建议优先选用45°,受力状态良好且易于加工成形。

Use of finite element method,in this article,stress analysis for high stress region in general discontinuous structure–sealed cone and notched cone at jacket in reacting vessel was carried out.The effects of flanged angle to membrane stress,bending stress,peak stress and maximum total stress were discussed.It was concluded as follows:the maximum stress in the flanged region of sealed cone is mainly determined from bending stress,and will be remarkably raised with the enlargement of the flanged-angle;the maximum stress in the flanged region of notched cone is mainly determined from both the membrane stress and bending stress,and will be raised with the diminishing of the flanged-angle;the flanged-angle of sealed cone should be selected as 30°in priority as the loading condition is not severe and relatively small stress is existed;however the flanged-angle of notched cone should be selected as 45°in priority as the loading condition is not severe and it is easy in fabrication.