规则和随机横浪中破损船舶运动响应研究

Research on Motion Response of Damaged Ships in Regular and Random Beam Seas

文中研究了破损船舶在规则和随机横浪中的运动响应问题.通过商用软件STAR-CCM+建立基于求解RANS方程的计算模型,预报破损舰船DTMB 5415在规则横浪中的运动响应.计算模型采用VOF方法捕捉自由液面;采用SST k-ω湍流模型计入湍流的影响;结合动态重叠网格方法处理计算过程中船舶运动引起的网格更新.通过波高的计算值与理论值对比,以及横摇频率响应函数的计算值与试验数据的对比,验证本文所建立计算模型的有效性,并采用谱分析方法预报该船破损情况下在随机横浪中的横摇运动.

In this paper,the motion response of damaged ships in regular and random beam seas was studied.The numerical model based on solving the RANS equations was established by commercial software STAR-CCM+,and the motion response of damaged ship DTMB 5415 in regular transverse waves was predicted.The VOF method was used to capture the free liquid surface in the calculation model,and the SST k-ωturbulence model was employed to include the turbulence effect.The dynamic overlapping grid method was combined to deal with the mesh update due to the ship motion in the simulation.By comparing the calculated wave height with the theoretical value,and comparing the calculated value of the roll frequency response function with the experimental data,the validity of the calculation model established in this paper was verified,and the roll motion of the ship in random beam seas when damaged was predicted by spectral analysis method.