锚泊多浮体系统动态响应

Dynamic response of muti-floating-body system

为保证锚泊多浮体系统能够在波浪中正常作业和生存,基于三维频域G reen函数法就一定水深不同浪向下锚泊多浮体系统的运动响应、锚缆拉力和连接器载荷进行了数值预报。分析中考虑到了浮体辐射势之间的相互影响以及连接器和锚系对于浮体运动响应的影响。分析表明,浮体的运动响应、连接器载荷以及锚缆张力受波频和浪向的影响很大,各项的极值出现在低频范围,浪向在30°和45°之间,连接器载荷出现最大值,而锚缆张力则在浪向90°时张力最大,处于迎浪面的锚缆张力较大于处于背浪面的锚缆张力。

The motion response of floating body system, tension force of mooring chains and linking loadings of connectors were predicted under different incident wave angles and wave frequencies based on 3-dimension potential flow theory, the interaction between the radiation potentials of floating bodies was considered and the effects caused by tensile forces of chains and linking forces on the motion response of the system were taken into account. The results show that the incident wave angles and frequencies affect the dynamic response of floating bodies obviously. The extremum of the motion response of the floating bodies, tension forces of mooring chains and linking loads of connectors occur in the area of low frequency. When wave direction is from 30° to 45°, the extremum of the connectoring loads of connectors will appear. If the wave direction is 90°,the extremum of the tension force of mooring chains will happen. The tension forces of mooring chains in head waves is greater than the one in following waves .