锚泊静回复力刚度和阻尼水平对深水浮式平台运动响应的影响

摘要

Based on the deepwater catenary mooring system used on a semi-submersible platform with 1500m water depths, four types of mooring systems are designed, in which static restoring force and damping are considered. The piecewise extrapolating method is employed to calculate the static restoring force of the mooring system. The mooring-induced damping is calculated with the quasi-static method. Motion of the semi-submersible platform is calculated in the time domain. The effects of static restoring force and mooring-induced damping on the motion response of the semi-submersible platform is summarized.%以一座工作水深1500m 半潜式平台的悬链线锚泊系统为基准，分别以静回复力刚度和锚泊阻尼为等效原则，设计了四组参照锚泊系统。设计过程中，采用分段外推法计算锚泊的静回复力刚度；利用准静定计算方法，根据锚泊系统由于上部浮体运动而产生的能量耗散原理计算锚泊系统阻尼。在时域范围内分别计算了半潜式平台在以上五组锚泊系统下的运动响应。通过比较分析，总结了静回复力刚度和锚泊系统阻尼水平对半潜式平台低频和波频运动响应的影响。