【作者】 陈伟； 于洪杰； 吴志伟； 钱才富；

【Author】 CHEN Wei;YU Hongjie;WU Zhiwei;QIAN Caifu;College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology;

【机构】 北京化工大学机电工程学院；

【摘要】 压力容器方形切向接管开孔结构存在较大的结构不连续性,在结构不连续区域产生高应力,并且目前没有适用的圆柱壳切向接管结构常规设计方法。本文采用极限载荷分析法,探讨针对不同方形切向接管的3个无量纲参数(即宽径比W/D_i、径厚比D_i/T、厚度比t/T)对承压圆柱壳极限承载能力的影响,并定义基于无接管圆柱壳体的强度削弱系数。结果表明,这W/D_i、D_i/T和t/T等3个无量纲参数均对圆柱壳方形切向接管强度存在显著影响,当W/D_i和D_i/T增大、t/T减小时,强度削弱系数增大,说明方形切向接管对圆柱壳的削弱程度增大。在大量数值计算基础上,对强度削弱系数进行回归分析,得到回归方程,为带方形切向接管内压圆筒结构的强度设计提供参考。更多还原

【Abstract】 The square tangential nozzle opening structure of pressure vessels exhibits significant structural discontinuity,leading to high stress concentrations in the discontinuous regions.Currently,there is no applicable conventional design method for cylindrical shell tangential nozzles.This study performed limit load analysis to investigate the influence of three non-dimensional parameters(namely width-to-inner-diameter ratio,inner-diameter-to-thickness ratio and thickness ratio) on the ultimate load-carrying capacity of pressurized cylindrical shells with square tangential nozzles.A strength reduction coefficient based on the unnoticed cylindrical shell was defined.The results indicate that these three factors significantly affect the strength of the square tangential nozzle in cylindrical shells.Specifically,as(W/Di) and(Di/T) increase,and(t/T) decreases,the strength reduction coefficient increases,indicating a greater degree of structural weakening due to the square tangential nozzle.Based on extensive numerical calculations,regression analysis was performed on the strength reduction coefficient,and a regression equation was obtained that provides a reference for the strength design of internally pressurized cylindrical shells with square tangential nozzles.更多还原