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Wave Forces and Low Frequency Drift Motions in Extreme Seas: Benchmark Studies

机译：极端海洋中的波浪力和低频漂移运动：基准研究

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The paper identifies the wave drift forces and low frequency damping induced by a wide range of extremernsea conditions on two floating units based on model test data, assesses the limitations of today's numericalrnprocedures and proposes solutions to overcome the limitations. Since wave current interaction effects arernof utmost importance, a benchmark study is carried out with several state of the art potential flow codes.rnCFD studies complement the numerical investigations.rnEmpirical wave drift force coefficients are identified by a second order signal analysis technique and thernresults compared with potential flow predictions and with predictions from a semi-empirical formula. Thernlow frequency damping is a result of the identification procedure as well. On a second stage, time domainrnsimulations are systematically performed for all tested conditions and the results compared in terms of wavernfrequency and low frequency motion responses. The systematic comparison between calculated responsesrnand model test data identifies the numerical methods limitations with regard to increasing seastates andrnincreasing current velocity.
机译：本文基于模型测试数据，识别了两个漂浮单元上各种极端海况条件引起的波动力和低频阻尼，评估了当今数值程序的局限性，并提出了克服这些局限性的解决方案。由于波浪电流相互作用的影响最为重要，因此对基准水平的研究采用了几种最新的潜在流代码.rnCFD研究是对数值研究的补充.rnn通过二阶信号分析技术确定了经验的波浪漂移力系数，并将结果与潜在流量预测以及来自半经验公式的预测。低频阻尼也是识别过程的结果。在第二阶段，针对所有测试条件系统地进行时域仿真，并根据波频和低频运动响应对结果进行比较。计算得到的响应值与模型测试数据之间的系统比较确定了数值方法在增加海况和增加流速方面的局限性。

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