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Nonlinear hull girder loads of a RoPax ship

机译：RoPax船的非线性船体梁荷载

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摘要

Numerical and experimental studies of nonlinear wave loads are presented. A nonlinear time domain method has been developed and the theoretical background of the method are provided. The method is based on the source formulation expressed by means of the transient three-dimensional Green function. The time derivative of the velocity potential in Bernoulli's equation is solved with a similar source formulation to that of the perturbation velocity potential. The Wigley hull form is used to validate the calculation method in regular head waves. Model tests of a roll-on roll-off passenger ship with a flat bottom stern have been carried out. Model test results of ship motions, vertical shear forces and bending moments in regular and irregular head waves and calm water are given. The nonlinearities in ship motions and hull girder loads are investigated using the calculation method and the model test results. The nonlinearities in the hull girder loads have been found to be significant and the calculation method can predict the nonlinear loads for the model test ship.
机译：提出了非线性波浪载荷的数值和实验研究。提出了一种非线性时域方法，并提供了该方法的理论背景。该方法基于通过瞬态三维格林函数表示的源公式。伯努利方程中速度势的时间导数可以用与扰动速度势的源公式相似的源公式求解。 Wigley船体形式用于验证常规头波中的计算方法。已经对具有平底船尾的滚装滚降客船进行了模型测试。给出了船舶运动，垂直剪力和规则和不规则头波以及平静水中的弯矩的模型测试结果。使用计算方法和模型测试结果研究了船舶运动和船体梁载荷的非线性。已经发现船体梁载荷中的非线性非常重要，并且计算方法可以预测模型试验船的非线性载荷。

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