【摘要】 分别采用频域分析法与时域分析法对南海某深水半潜式平台的运动响应进行了计算,对比分析了两种方法在深水半潜式平台运动响应预报结果上的异同。对于波频运动(纵摇、横摇、垂荡),两种方法的计算结果较为吻合;对于纵荡和横荡运动,频域分析法的计算结果低于时域分析法计算结果。频域分析法对深水半潜式平台波频运动的预报精度较高,但对非线性效应明显的平台纵荡和横荡运动的预报结果偏低,仅适用于平台方案选型或设计的初期阶段;而时域分析法可以更好地处理深水半潜式平台运动响应计算中的非线性问题,更适用于平台设计的后期阶段。更多还原

【Abstract】 The calculation was made separately with frequency-domain analyzing method and time-domain analyzing method to compare the difference in forecasted results of motion-response of a deepwater semi-submersible platform in the South China Sea.The results calculated by the two methods are matched well relatively for wave frequency motions(heave,pitch,and roll);however,as for surge and sway,the calculated result of frequency-domain analyzing method appeared lower than that of time-domain analyzing method.Frequency-domain analyzing method was merely suited for early stage of platform scheme lectotype or design due to its high forecasting accuracy to deepwater semi-submersible platform wave-frequency motions and low forecasting results for surge and sway of platform with apparent nonlinear effect.The time-domain analyzing method was suit for later stage of platform design much more for its better treatment with nonlinear problem of deepwater semi-submersible platform motion-response.更多还原