压力容器分析设计中等效应力的研究与探讨  

Research and discussion on equivalent stress in design by analysis of pressure vessels

作　　者：白云波 张亚宁 袁继禹 杜常宗 BAI Yunbo;ZHANG Yaning;YUAN Jiyu;DU Changzong(Ningxia Shenyao Technology Co.,Ltd.,Yinchuan 750000,China;Zhejiang University,Hangzhou 310007,China)

机构地区：[1]宁夏神耀科技有限责任公司,银川750000 [2]浙江大学,杭州310007

出　　处：《压力容器》2022年第10期54-59,共6页Pressure Vessel Technology

基　　金：宁夏回族自治区2017年重点研发计划项目(沿黄试验区科技创新专项)(2017BY049);宁夏回族自治区2018年重点研发计划项目(重大科技专项)(2018BCE01004)。

摘　　要：采用二维或三维实体模型对压力容器进行分析设计时,线性化路径选择及应力分类上会出现一些模棱两可或不保守的情况,在计算应力张量和主应力的过程中,不恰当的线性化某些应力张量会导致计算结果出现错误。本文重点研究二维连续单元结构应力线性化过程中,应力张量选择、薄膜应力和弯曲应力计算等,探究等效应力线性化出现问题的原因,提出校核应力线性化结果时需要考虑的因素,避免出现错误。When using two-dimensional or three-dimensional solid models for design by analysis of pressure vessels,there will be some ambiguity or inconsistency in the selection of linearization paths and stress classification,and improper linearization of some stress tensors in the process of calculating stress tensors and principal stresses will lead to errors in calculation results.This study focuses on the selection of stress tensors and calculation of thin film stress and bending stress in the process of stress linearization of two-dimensional continuous element structure,explores the cause of the problem of equal stress linearization,and proposes the factors that need to be considered when checking the stress linearization results in order to avoid errors.

关 键 词：压力容器 分析设计 弹性应力分析 应力线性化 等效应力 

分 类 号：TH49[机械工程—机械制造及自动化] TH123[理学—固体力学] O343[理学—力学]