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采用双峰频谱模拟涌浪和风浪同时出现的混合浪,以一艘26.6万立方米的LNG船舶为试验对象,对混合浪作用下系泊船舶的运动响应规律进行物理模型试验研究。结果表明:当混合浪能量一定时,系泊船运动量大多随着低频部分波浪能量的增大而增大;在一定装载状态下,系泊船纵荡和垂荡运动量随混合浪中涌浪周期的增大逐渐增大,横荡、横倾和回转运动量峰值与船舶自然固有横荡周期存在着一定的比例关系;当混合浪中风浪条件一定时,系泊船运动量大多随着涌浪波高的增大迅速增大;当混合浪中涌浪条件一定时,风浪波高的改变对系泊船舶运动量的影响较小;在横向波浪作用下,系泊船纵倾运动受混合浪变化影响很小。
The bimodal spectrum was used to simulate the mixed waves of surge and wind and wave. A 266,000 cubic meter LNG vessel was used as the test object to study the physical model test of the response of the moored ship under the mixed wave. The results show that when the energy of the mixed wave is constant, the amount of mooring ship motion mostly increases with the increase of the wave energy in the low-frequency part. Under certain loading conditions, the mooring and heaving motion of the moored ship varies with the surge period And the peak value of the swaying, heeling and turning movements is proportional to the natural period of the ship. When the condition of wind and wave in the mixed wave is constant, the movement of the moored ship mostly increases with the surge wave height The change of the wave height has little effect on the amount of mooring of the ship when the surge condition of the mixed wave is constant. The effect of the lateral wave on the pitch motion of the moored ship is less affected by the change of the mixed wave.