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海底管道悬跨段流致振动实验研究及涡激力模型修正 被引量:24

EXPERIMENTAL STUDY ON VIV OF SPAN OF SUBSEA PIPELINE AND IMPROVED MODEL OF LIFT FORCE
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摘要 对输送液体的模型管道进行了涡激振动试验研究,试验结果表明:当理论涡脱频率与管道的固有频率不一致时,作用在振荡管道上的涡激力并非简谐扰力,而是具有一定带宽的窄带随机扰力。因此,管道的涡激振动响应也是一个随机过程。当理论涡脱频率与管道的固有频率接近时,管道的涡激振动响应逼近简谐振动。试验结果也表明:作用在振荡圆柱体上的涡激力频率不仅是流速和圆柱体直径的函数,也是圆柱体固有频率的函数。 Tests for the vortex-induced vibration (VIV) of the models of subsea pipeline with internal flow have been carried out. The results show that if there is a big difference between vortex shedding frequency and natural frequency of cylinder, the lift force acting on oscillating cylinder is a stochastic force with narrow bandwidth and if there is a little difference between them, the response of models is periodic oscillation. It is also revealed that the frequency of vortex shedding on oscillating cylinder will change with not only the velocity of fluid and the diameter of the cylinder, but also natural frequency of the cylinder.
出处 《工程力学》 EI CSCD 北大核心 2007年第12期153-157,共5页 Engineering Mechanics
基金 国家自然科学重点基金资助项目(50639030) 教育部博士点基金资助项目(20050423002)
关键词 海底管道 涡致振动 试验研究 斯特罗哈频率 涡激升力 subsea pipeline VIV experimental study Strouhal frequency lift force
作者简介 黄维平(1954-),男,浙江人,教授,博士,博导,主要从事海洋工程研究(E-mail:wphuang@mail.ouc.edu.cn) 王爱群(1955-),男,山东人,教授,学士,主要从事水利学试验研究(E-mail:ghaq@ouc.edu.cn) 李华军(1962-),男,山东人,教授,博士,博导,院长,主要从事海洋工程研究(E-mail:huajun@ouc.edu.cn)
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参考文献14

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