中文摘要：

为改善不同风浪条件下系泊缆的定位能力，在悬链式系泊的基础上施加一定方式的约束。约束缆绳在距各悬链线导缆孔等长度位置首尾相连，形成的三角形称为约束外边界，约束内边界分别平行于各外边界，两端固结在相应中线位置，称该约束方式为挠性三角约束。为研究此种约束作用下NREL5MW型浮式风机的六自由度运动及悬链线有效张力的波浪响应特性，采用凝集质量法计算系泊缆有效张力，叶素理论计算风机空气动力载荷，在Stokes5阶波作用下，探讨挠性三角约束在各自由度共振频率下的性能。结果表明，约束边界的存在使得悬链线能及时提供系统所需的回复张力，对于纵荡、垂荡、纵摇三个自由度的共振均能起到一定的抑制作用，但由于连接点过少，存在连接点处曲率过大问题。

英文摘要：

In order to improve the positioning capabilities of mooring lines under different wind and wave conditions, constraint is imposed on the basis of catenary mooring system. Constraints cable connected end to end in catenary lines at which the catenary＇s equal length position from each fairleader , the formed triangle is called exterior constrained boundary, the inner constrained boundaries of which both ends are lashed on the relevant midline are parallel to the corresponding external one, the way of constriant here is called triangle flexible constraint. For studying wave excitation response of NREL 5MW turbine＇s 6 DOF motion and catenary effective tension, lumped-mass method is applied to calculate the effective mooring tension, blade element theory is used to calculate aerodynamic loads, the performance of triangle flexible constraint under Stoke＇s 5 order wave loads is discussed. The results show that the existence of constrained boundaries enable catenary system to provide restoring force in time, so this type of constraint plays a key role in limiting the resonance of surge, heave and pitch, but the curvature ofjunction point is too large since inadequate setting of connections.