THE NONLINEAR SUM-FREQUENCY WAVE EXCITATION AND RESPONSE OF A TENSION-LEG PLATFORM
THE NONLINEAR SUM-FREQUENCY WAVE EXCITATION AND RESPONSE OF A TENSION-LEG PLATFORM
复制标题
张紧腿平台的非线性和频波激励及响应
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
D. Yue
中科院分区：
文献类型：
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作者：
Moo;D. Yue
本文将新近发展的轴对称体二阶绕射理论应用于张力腿平台的非线性高频共振波激励及其产生的运动和张力力。二阶问题的解决方案，包括非线性潜力的贡献，为单腿的和频力和力矩的任意组合的两个入射波频率。这些结果适用于一个完整的TLP的总高频激励，响应和钢筋束拉伸载荷。对于不规则的环境波，还获得了载荷的谱和均方根。结果表明，本文的预测值比排除非线性势影响的近似值大2-3倍。忽略二阶势效应可能是导致张力腿平台的测量值与波浪载荷计算值之间存在较大差异的主要原因
A recently developed complete second-order diffraction theory for axisymmetric bodies is here applied to the nonlinear high-frequency resonant wave excitation and resultant motions and tendon loads of a tension-leg platform. The solution of the second-order problem, including contributions of the nonlinear potential, for the sum-frequency forces and moments on a single leg are obtained for an arbitrary combination of two incident-wave frequencies. These results are applied to a full TLP for the total high-frequency excitation, response, and tendon tension loads. For irregular ambient waves, the spectrum and rms of the loads are also obtained. It is found that the present predictions are 2-3 times greater than approximations which exclude the effects of the nonlinear potential. The neglect of second-order potential effects may be the primary cause of the observed large discrepancies between measurements and wave loads calculations of the TLP