压力管道直管段局部减薄缺陷评定的新公式  

New Evaluation Formulas for Pressure Pipes with Local Thin Areas in Straight Sections

作　　者：李思源[1,2] 张玉福[1,2] 唐毅 李祚成[1,2] 李倩倩[1,2] 

机构地区：[1]甘肃蓝科石化高新装备股份有限公司,甘肃兰州730070 [2]机械工业兰州石油化工设备检测所有限公司,甘肃兰州730070 [3]中核武汉核电运行技术股份有限公司,湖北武汉430223

出　　处：《压力容器》2014年第8期25-33,共9页Pressure Vessel Technology

基　　金：国家质检总局科技计划项目(2013zjjz074)

摘　　要：研究了压力管道含局部减薄直管段的评定理论和方法:利用剩余强度系数的新公式和爆破失效剩余强度系数的新数据,建立了外壁含规则化减薄直管段(圆柱壳)剩余强度系数的计算式RSFo;应用薄壁直管剩余弯矩系数m的计算式、边界理论解和有限元计算结果,建立了内外壁含规则化减薄直管段剩余弯矩系数RMC的计算式;提出了失效载荷因子的新概念,导出了规则化减薄直管段的失效准则、判据和极限弯矩的计算方法;由失效判据导出了规则化减薄直管段的安全评定判据,建立了含局部减薄直管段的评定方法。Evaluation theories and methods are studied for pressure pipes with local thin areas (LTAs)in straight sections:Utilizing the new remaining strength factor (RSF)formula and the new data of burst fail-ure RSF,a new RSF formula is established for outside walls of cylindrical shells with regular LTAs in straight sections.Employing remaining moment coefficient (RMC ) formula for thin -walled straight pipes,border theoretical solution,and results of finite element calculation,another new RMC formula is created for straight sections with regular LTAs on both inner and outer walls.Failure and assessment crite-ria are proposed for straight sections with regular LTAs,and an evaluation method is established for straight sections with LTAs.

关 键 词：压力管道直管段 局部减薄缺陷 计算公式 评定方法 

分 类 号：TQ055.81[化学工程]