深水隔水管-测试管系统非线性动力学模型研究  

Nonlinear dynamic model of deep-water RTS

作　　者：何玉发 郭晓强 刘清友[3] 柳军[2] 王国荣[2] 毛良杰[3] HE Yufa;GUO Xiaoqiang;LIU Qingyou;LIU Jun;WANG Guorong;MAO Liangjie(State Key Laboratory of Natural Gas Hydrates,CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;College of Mechanical and Electrical Engineering,Southwest Petroleum University,Chengdu 610500,China;State Key Lab of Oil and Gas Reservoir Geology and Development Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中海油研究总院有限责任公司天然气水合物国家重点实验室,北京100028 [2]西南石油大学机电工程学院,成都610500 [3]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500

出　　处：《振动与冲击》2022年第11期104-113,共10页Journal of Vibration and Shock

基　　金：国家重点研发计划课题(2021YFC2800905,2018YFC0310205);国家自然科学基金(U20B6005);国家自然科学基金(52105125,51875489);国家重点基础研究发展计划(“973”计划)(2015CB251205)。

摘　　要：在深水测试工况中,隔水管-测试管系统受到海流VIV效应、自身纵横向耦合效应以及测试管FIV效应,极易发生屈曲变形、疲劳断裂和摩擦穿孔等破坏问题。笔者采用微元法、能量法结合哈密顿变分原理建立了深水隔水管-测试管系统非线性振动模型,基于弹塑性体接触碰撞理论,提出了管柱系统非线性接触载荷计算方法。采用三次Hermit差值形函数和Newmark-β法离散并求解系统振动模型。借助现场管柱参数,采用相似原理,设计了隔水管-测试管系统非线性振动模拟试验台架,测得隔水管和测试管的振动响应,与理论模型计算结果和单管振动模型计算结果对比,验证了深水隔水管-测试管系统非线性振动模型的正确性和有效性。在此基础上,分析了中国南海实例井管柱振动特性,表明在测试管振动疲劳分析时,不能忽略其自身局部高频振动的影响;测试管易发生强度失效的位置主要出现在中上部和下部。研究成果为深水测试管-隔水管的安全设计奠定理论基础。In deep-water test conditions,a riser-test pipe system(RTS)is subject to ocean current vertex induced vibration(VIV)effect,itself vertical-horizontal coupled effect and test pipe flow induced vibration(FIV)effect,RTS is very easy to have buckling deformation,fatigue fracture and friction perforation.Here,the nonlinear vibration model for a deep-water RTS was established by using the differential element method,the energy method and Hamilton variational principle.Based on the elastic-plastic body contact collision theory,the calculation method of nonlinear contact load of pipe string system was proposed.The cubic-hermit difference shape function and Newmark-β method were used to discretize and numerically solve the vibration model of the deep-water RTS.By means of onsite pipe string system parameters and the similarity principle,the nonlinear vibration simulation test bench of RTS was designed,and vibration responses of riser and test pipe were measured.Comparing the measured results with the calculation ones using the theoretical model and single pipe vibration model,the correctness and effectiveness of the nonlinear vibration model of deep-water RTS were verified.Finally,vibration characteristics of the pipe string system of an actual example well in South China Sea were analyzed.It was shown that effects of local high-frequency vibration can’t be ignored in vibration fatigue analysis of test pipe;positions on test pipe where test pipe is easy to have strength failure are mainly in its middle-upper and lower parts;the study results lay a theoretical foundation for safety design of deep-water RTS.

关 键 词：隔水管-测试管系统 哈密顿变分原理 非线性振动模型 模拟试验 振动特性 

分 类 号：TE38[石油与天然气工程—油气田开发工程]