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On-line Access: 2022-05-23
Received: 2021-09-30
Revision Accepted: 2021-10-18
Crosschecked: 2022-05-23
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Sun-ting YAN, Ping TANG, Zhang-wei LING, Yong-gui CHEN. An analytical investigation of the collapse of asymmetrically corroded pipes under external pressure[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2100487 @article{title="An analytical investigation of the collapse of asymmetrically corroded pipes under external pressure", %0 Journal Article TY - JOUR
外压下非对称腐蚀管道的垮塌理论研究机构:浙江省特种设备科学研究院,中国杭州,310020 目的:腐蚀缺陷削弱管道的极限承载外压。本文旨在探讨非对称腐蚀形态下管道极限外压的理论计算方法。 创新点:1.建立非对称腐蚀管道在外压下垮塌的非齐次微分控制方程;2.通过摄动法技巧,给出初始变形的显式表达;3.深入讨论薄膜可压缩性对垮塌压力的影响。 方法:1.通过理论推导,构建非对称腐蚀缺陷下管道变形的控制方程;2.采用摄动法和对称算子方法,分析变形和压力的关系;3.通过任意小李雅普诺夫半解析方法,求解齐次和非齐次微分控制方程,对任意壁厚分布具有一定的适用性。 结论:1.理论计算结果和有限元计算结果基本一致;2.不对称参数对变形有较大影响;3.基于欧拉-伯努利假设的连续性条件较为复杂,但是简化连续性条件是可行的;4.薄膜拉伸性严重影响初始变形;5.半解析方法总是收敛的,同时同伦分析法中收敛控制参数应该在(?2, 0)取值。 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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