| 局部减薄埋地三通塑性极限内压的有限元分析 |
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| 引用本文： | 马季红,帅键,魏化中,舒安庆.局部减薄埋地三通塑性极限内压的有限元分析[J].管道技术与设备,2010(1):34-36. |
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| 作者姓名： | 马季红 帅键 魏化中 舒安庆 |
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| 作者单位： | 1. 武汉市压力容器压力管道安全工程研究中心,湖北武汉,430073;武汉工程大学机电工程学院,湖北武汉,430073
2. 中国石油大学(北京),北京,100044 |
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| 摘 要： | 针对埋地三通外表面局部减薄缺陷，采用弹塑性有限元分析软件ANSYS，研究了单一内压作用下外壁局部减薄埋地等径三通的塑性极限栽荷。考虑几何非线性和材料非线性，分析了缺陷尺寸的变化和位置沿主管底部轴向变化对埋地三通塑性极限载荷影响的变化规律和失效模式，根据腐蚀区的载荷一应变图，对模型的塑性极限载荷进行了预测，研究结果可为含局部减薄等径三通结构设计和安全评定提供理论依据和数值参考。
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| 关 键 词： | 等径三通 局部减薄 塑性极限载荷 |
Finite Element Analysis of Plastic Limit Loads of Equal-diameter T-junction of Piping with Local Wall-thinning under Internal Pressure |
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| MA Ji-hong,SHUAI Jian,WEI Hua-zhong,SHU An-qing.Finite Element Analysis of Plastic Limit Loads of Equal-diameter T-junction of Piping with Local Wall-thinning under Internal Pressure[J].Pipeline Technique and Equipment,2010(1):34-36. |
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| Authors: | MA Ji-hong SHUAI Jian WEI Hua-zhong SHU An-qing |
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| Institution: | 1.Wuhan Research Center of Pressure Vessel and Pipeline Safety Engineering;Wuhan 430074;China;2.School of Mechanical and Electrical Engineering;Wuhan Institute of Technology;3.University of Petroleum;Beijing 100044;China |
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| Abstract: | In this paper,ANSYS,a software of elasto-plastic FEM,is used to evaluate the limit load for the equal-diameter T-junctions of piping with local wall-thinning under a single internal pressure.Taking geometrical nonlinearity and material nonlinearity into consideration,investigations are made of the effects of the sizes and positions of local wall-thinning on the plastic limit load of the equal-diameter T-junctions of piping.The failure modes of equal-diameter piping branch junctions with local wall-thinning ... |
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| Keywords: | equal-diameter T-junction of piping local wall thinning plastic limit loads |
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