【摘要】 张力腿型浮式风力机结构紧凑、垂向运动性能较好，但系统的水平刚度低，在极端条件下环境载荷可能激发大幅纵荡运动，进而诱发非线性动力失稳。考虑浮式风力机基础下沉运动和张力腿拉伸引起的非线性刚度，建立了浮式基础纵荡非线性运动方程。应用非线性动力学理论与方法，研究风浪联合作用下的风轮推力、波浪力、线性阻尼和非线性刚度等因素对张力腿型浮式风力机纵荡运动的影响。研究发现：浮式风力机纵荡运动的主共振区随纵荡阻尼的减小、非线性刚度和波浪力的增大而逐渐扩大，运动幅值也随之增加。更多还原

【Abstract】 The tension-leg platform floating wind turbine(TLPWT) is compact-structured with excellent vertical motion performance and poor horizontal hydrodynamic performance. The extreme environmental loads may excite large amplitude of surge motion, which will induce complex nonlinear dynamic instabilities. Nonlinear heave stiffness of the floating foundation and tensile of tension-leg are considered to establish nonlinear motion equations of the floating foundation for surge amplitude. The turbine thrust, wave force, linear damping and nonlinear stiffness with joint impact of wind and waves are selected to analyze their influences to surge motion of the TLPWT. It is found that the main resonance region of the surge gradually expands with the decrease of the surge damping coefficient, as well as with the increase of nonlinear stiffness and wave force, the amplitude of surge motion increases.更多还原