局部减薄直管双判据安全评定方法  

Safety Assessment Method Based on Strength and Limit Moment Dual Criteria for Straight Pipe with Local Wall Thinning Defects

作　　者：李祚成 李逸轩 唐毅 李思源[4] 张乐兴 LI Zuo-cheng;LI Yi-xuan;TANG Yi;LI Si-yuan;ZHANG Le-xing(Machinery Industry Shanghai Lanya Petrochemical Equipment Inspection Co.Lt.,Shanghai 201600,China;Powerchina Sepco1 Electric Power Construction Co.Ltd.,Jinan 250000,China;China Nuclear Power Operation Technology Corporation,Ltd.,Wuhan 430023,China;Lanzhou Petroleum Machinery Research Institute CO.,Ltd.Lanzhou 730050,China)

机构地区：[1]机械工业上海蓝亚石化设备检测所有限公司,上海201600 [2]中国电建集团山东电力建设第一工程有限公司,山东济南250000 [3]中核武汉核电运行技术股份有限公司,湖北武汉430023 [4]兰州石油机械研究所,甘肃兰州730050

出　　处：《石油化工设备》2025年第1期13-19,共7页Petro-Chemical Equipment

摘　　要：研究局部减薄直管在内压、轴向力、扭矩和弯矩联合作用下的安全评定新方法。推导了减薄直管在内压、轴向力和扭矩联合作用下的环向应力、轴向应力和切应力的简便计算公式。采用塑性失效理论,对规则化减薄直管建立了极限弯矩计算方法。采用Mises当量应力,建立了规则化减薄直管在内压、轴向力和扭矩联合作用下的强度判据。利用规则化减薄直管在内压、轴向力和扭矩联合作用下的强度条件和极限弯矩载荷,提出了管道安全评定的双判据准则,建立了规则化减薄直管在内压、轴向力、扭矩和弯矩联合作用下的双判据安全评定方法。An innovative safety assessment method oflocal wal thinning of straight pipe under the combined action of internal pressure,axial force,torque and bending moment was proposed.A simple formula for calculating hoop stress,axial stress,and shear stress was derived considering the combined action of internal pressure,axial force,and torque.Aiming at the straight pipe with local wall thinning defect,the limit bending moment calculation method was established on the basis of plastic failure theory,and the strength criterion was also proposed using Mises equivalent stress under the above-mentioned combined action of multiple loads.Finally,the dual criterion assessment method based on both the strength condition and the limit bending moment load was established and is applicable to evaluate the safety of the pipe with local wall thinning defect under the combined action of internal pressure,axial force,and torque.

关 键 词：管道 局部减薄 组合载荷 双判据 安全评定方法 

分 类 号：TQ050.2[化学工程]