| 含球型凹坑缺陷燃气管道弯管极限载荷的研究 |
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| 引用本文： | 魏化中,陈文霞,舒安庆.含球型凹坑缺陷燃气管道弯管极限载荷的研究[J].管道技术与设备,2008(3):34-35. |
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| 作者姓名： | 魏化中 陈文霞 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武汉工程大学机械工程学院,湖北武汉,430073
2. 武汉工程大学机械工程学院,湖北武汉,430073 |
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| 摘 要： | 凹坑是埋地管道中常见的体积型缺陷,是一种破坏性较大的局部缺陷,而弯管是埋地管道中的重要管件。应用有限元分析软件ANSYS,对含球型凹坑缺陷的燃气管道弯管在内压载荷作用下进行有限元分析,分析中考虑材料非线性和几何非线性,根据腐蚀区的载荷-应变图,对模型的塑性极限压力进行了预测,并得出了缺陷尺寸对塑性极限载荷的影响及变化规律,得到了一些对含缺陷弯管的安全评定有参考价值的结论。
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| 关 键 词： | 弯管 凹坑 塑性极限载荷 |
Research on the Plastic Limit Load of Gas Pipe Elbow with Pitting Corrosion |
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| WEI Hua-zhong,CHEN Wen-xia,SHU An-qing.Research on the Plastic Limit Load of Gas Pipe Elbow with Pitting Corrosion[J].Pipeline Technique and Equipment,2008(3):34-35. |
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| Authors: | WEI Hua-zhong CHEN Wen-xia SHU An-qing |
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| Institution: | WEI Hua-zhong, CHEN Wen-xia, SHU An-qing (1. Wuhan Research Center of Pressure Vessel and Pipeline Safety Engineering, Wuhan 430073, China; 2. School of Mechanical Engineering, Wuhan Institute of Technology, Wuhan 430073, China) |
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| Abstract: | A part-through slot which is a common three-dimensional defect on the surface of buried pipes,is one of destructive local defect.Elbow is a type of component widely used in the buried pipelines.As a computational method,FEM is adopted to calculate the collapse pressurized with pitting corrosion,by taking the immense deformation effects and stress stiffening into consideration.In light of the geometrical parameter,the effect of defects on the plastic limit load are obtained and some referential conclusion is drawn for the security assessment of elbows with defects. |
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| Keywords: | elbow pitting corrosion plastic limit load |
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