深水半潜式平台Mathieu不稳定问题研究
MATHIEU INSTABLITY STUDY OF A DEEPWATER SEMI-SUBMERSIBLE PLATFORM
查看参考文献12篇
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文摘
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半潜式平台的垂荡运动相对较大,当平台的纵摇固有有周期和垂荡固有周期处于一定的倍数关系时,平台的纵摇/横摇运动可能落入Mathieu不稳定区。该文对半潜式平台Mathieu方程进行了推导,获得了各参数的计算公式;根据Mathieu不稳定图谱或数值计算方法,可判断纵摇/横摇运动的稳定性。选取了一个生存状态下的半潜式平台为算例,分析了平台发生Mathieu不稳定问题的条件,并通过调整关键参数抑制不稳定问题的发生,从而获得了避免Mathieu不稳定问题的工程措施,为今后半潜式平台设计提供参考。 |
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其他语种文摘
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The heave response of a semi-submersible platform is relatively significant than other floaters.While a certain ratio of heave natural period and pitch/roll natural period is reached,the pitch/roll motions of the platform will fall into a Mathieu instability zone.In the paper,a damped Mathieu equation for the semi-submersible platform was derived and the formulae of the control parameters were obtained to determine the stability of its pith/roll motion according to the parameter diagram of Mathieu instability or via numerical simulations.A semi-submersible platform was analyzed to investigate the Mathieu instability conditions.Furthermore,engineering measures on avoiding possible Mathieu instability are proposed and they may be some references for the design of semi-submersible platforms. |
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来源
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工程力学
,2012,29(10):347-353 【核心库】
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DOI
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10.6052/j.issn.1000-4750.2011.01.0063
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关键词
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半潜式平台
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垂荡
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纵摇
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Mathieu不稳定
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固有周期
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参数共振
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地址
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中海石油研究中心, 北京, 100027
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语种
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中文 |
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ISSN
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1000-4750 |
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学科
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海洋学;建筑科学 |
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基金
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国家863计划
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文献收藏号
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CSCD:4671843
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