| 基于LH矩法的半潜式平台气隙响应极值分析 |
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| 引用本文： | 刘双a,b,肖龙飞a,b,寇雨丰a. 基于LH矩法的半潜式平台气隙响应极值分析[J]. 上海交通大学学报, 2017, 51(2): 209 |
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| 作者姓名： | 刘双a b 肖龙飞a b 寇雨丰a |
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| 作者单位： | 上海交通大学 a.海洋工程国家重点实验室; b.高新船舶与深海开发装备协同创新中心,上海 200240 |
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| 基金项目： | 国家自然科学基金重点项目（51239007）,工业和信息化部高技术船舶科研项目资助 |
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| 摘 要： | 以设计水深为1.5km的半潜式平台为研究对象,假设相对波浪升高峰值服从双参数Weibull分布,引入LH矩法,通过模型试验数据对分布中的未知参数进行估计,得到相应的超越概率分布曲线.分析结果表明:随着LH矩阶数的增加,双参数Weibull分布可以很好地拟合非线性较弱的一年一遇海况下相对波浪升高较大部分峰值,对于百年一遇海况下非线性较强的相对波浪升高较大部分峰值,拟合程度也显著改善.
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| 关 键 词： | 半潜式平台 气隙 双参数Weibull分布 LH矩 超越概率分布 |
Analysis of Extreme Air Gaps of a Semi Submersible Using #br#Method of LH Moments |
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| LIU Shuanga,b,XIAO Longfeia,b,KOU Yufenga. Analysis of Extreme Air Gaps of a Semi Submersible Using #br#Method of LH Moments[J]. Journal of Shanghai Jiaotong University, 2017, 51(2): 209 |
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| Authors: | LIU Shuanga b XIAO Longfeia b KOU Yufenga |
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| Affiliation: | a. State Key Laboratory of Ocean Engineering; b. Collaborative Innovation Center for Advanced Ship
and Deep Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | For a semi submersible operated in water at a depth of 1.5km, the sample data of the relative wave crests at different locations from an experiment were assumed to follow a two parameter Weibull distribution and the method of LH moments was used to estimate the parameters. Then, the exceedance probability distributions for different orders of LH moments were obtained. The results show that as the order of LH moments increases, the two parameter Weibull distribution yields better trend of the large relative wave crests under the 1 year return sea state, and clearly a better fit of the large relative wave crests under the 100 year return sea state. |
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| Keywords: | semi submersible air gap two parameter Weibull distribution LH moments exceedance probability distribution |
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