| 考虑几何非线性的张力腿平台随机响应等效线性化分析 |
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| 引用本文： | 何勇,金伟良,龚顺风.考虑几何非线性的张力腿平台随机响应等效线性化分析[J].海洋工程,2008,26(4). |
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| 作者姓名： | 何勇 金伟良 龚顺风 |
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| 作者单位： | 浙江大学,结构工程研究所,浙江,杭州310027 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目 |
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| 摘 要： | 考虑深海柔性张力腿平台的几何非线性特征,建立柔性平台结构非线性随机振动响应分析方法.该方法结合模态分析,把系统隐式的非线性项转化为由模态坐标高次组合表示的显式非线性项,在此基础上引入虚拟激励法,建立结构在随机波浪荷载作用下的等效线性化系统,从而确定结构各非线性随机响应.通过对某一mini-TLP的分析结果和试验实测值的比较,表明该方法具有较好的计算精度和较快的计算速度,能够满足大型结构的非线性随机响应分析要求.通过对不同波高的计算,结果表明张力腿平台在较大波高作用下几何非线性影响显著,忽略这部分的影响,计算结果将会产生很大的误差.
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| 关 键 词： | 张力腿平台 几何非线性 等效线性化 虚拟激励法 随机响应 |
Stochastic equivalent linearization analysis for Tension Leg Platform considering geometrical nonlinearity |
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| HE Yong,JIN Wei-liang,GONG Shun-feng.Stochastic equivalent linearization analysis for Tension Leg Platform considering geometrical nonlinearity[J].Ocean Engineering,2008,26(4). |
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| Authors: | HE Yong JIN Wei-liang GONG Shun-feng |
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| Institution: | HE Yong,JIN Wei-liang,GONG Shun-feng(Institute of Structural Engineering,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | Considering the geometrical nonlinearity,a new method for the nonlinear random vibration of flexible Tension Leg Platform(TLP) is presented in this paper.Firstly,using modal analysis,the implicit system is represented as an explicit nonlinear system whose nonlinear term is based on the combination of modal coordinates.Secondly,using the pseudo-excitation method,the stochastic equivalent linear system is established.Based on the equivalent linear system,the response of the TLP can be gained conveniently.The ... |
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| Keywords: | Tension Leg Platform(TLP) geometrically nonlinear stochastic equivalent linearization pseudo-excitation method stochastic response |
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