风浪作用下HYSY-981半潜式平台动力响应的数值模拟

朱 航;马 哲;翟刚军;欧进萍;

振动与冲击 ›› 2010, Vol. 29 ›› Issue (9) : 113-118.

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (9) : 113-118.
论文

风浪作用下HYSY-981半潜式平台动力响应的数值模拟

  • 朱 航1;马 哲2;翟刚军2;欧进萍1,2
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Numerical simulation of the dynamic behavior of HYSY-981 semi-submersible platform subject to wind and waves

  • Zhu Hang1 ;Ma Zhe2;Zhai gang-jun2;Ou Jin-ping1,2
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摘要

半潜式平台是适用于深水油气开发的一种浮式平台,平台的运动响应与锚泊系统的张力是平台结构设计或优化设计的重要基础。本文通过时域方法分析了HYSY-981半潜式平台在风浪联合作用下的非线性运动响应。其中随机波浪的时历曲线是由Jonswap谱生成,波浪载荷通过边界元方法计算,风载荷通过1:100的模型由风洞实验确定,锚泊系统拉力的计算采用了分段外推-校正法,平台的运动方程通过Runge-Kutta法求解。根据计算所得的平台运动响应时程曲线,计算了平台位移的功率谱密度曲线。计算结果表明,平台的水平运动主要受低频载荷影响,而平台的垂荡和偏转运动在波频范围内响应较大。

Abstract

Semi-submersible platform is one of the compliant offshore platforms used for deepwater oil and gas exploration. The platform motion response and the tension of the mooring systems are needed for optimum design of the structure. In this paper nonlinear dynamic analysis of HYSY-981 semi-submersible platform subject to wind and waves was carried out in time domains. The time history of random wave was generated based on Jonswap spectrum. The hydrodynamic forces were calculated by boundary element method, and the wind loads were got from wind tunnel test of the model of the platform with a scale of 1:100, the tensions of the mooring system were calculated by piecewise extrapolating method, and the nonlinear equations of the platform motion was solved by Runge-Kutta method. According to the time history of the platform motion obtained, the power spectral densities of displacements were calculated. The numerical results indicated that the horizontal motion of the platform is greatly influenced by the low frequency loads, but the heave motion and pitch (or roll) motion are greatly influenced by the wave frequency loads.

关键词

半潜式平台 / 运动响应 / 数值计算 / 功率谱密度

Key words

semi-submersible platform / motion response / numerical simulation / power spectral density

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导出引用
朱 航;马 哲;翟刚军;欧进萍;. 风浪作用下HYSY-981半潜式平台动力响应的数值模拟[J]. 振动与冲击, 2010, 29(9): 113-118
Zhu Hang;Ma Zhe;Zhai gang-jun;Ou Jin-ping;. Numerical simulation of the dynamic behavior of HYSY-981 semi-submersible platform subject to wind and waves[J]. Journal of Vibration and Shock, 2010, 29(9): 113-118

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