The free surface effects of random wave forces are studied by means of nonlinear spectral analysis and a new calculating model is proposed.
应用非线性谱分析法对随机波浪载荷的自由表面效应进行了研究，提出了一种新的计算模型。
The nonlinear dynamic response of an articulated loading tower under the action of random sea waves is carried out by means of nonlinear spectral analysis.
本文应用非线性谱分析法，对铰接装油塔在随机海浪作用下的非线性动力响应进行了分析。
A complete set of calculating methods for complex modal analysis of nonlinear random response of structures with multi-degrees of freedom and base isolation are proposed.
从而建立了多自由度隔震结构非线性随机响应复模态分析的一整套计算方法。
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