极端海况下考虑系泊断裂风-浪联合发电结构体系失稳机理与判别准则  

Instability mechanism and criteria of wind–wave co-generation structural system considering mooring failure under extreme sea conditions

作　　者：李文杰[1,2] 柯世堂 张郁江[1] 朱松晔 任贺贺[1] LI WenJie;KE ShiTang;ZHANG YuJiang;ZHU SongYe;REN HeHe(Department of Civil and Airport Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;Department of Civil Engineering,Guilin University of Technology,Guilin 541004,China;Department of Civil and Environmental Engineering,Hong Kong Polytechnic University,Hong Kong 999077,China)

机构地区：[1]南京航空航天大学土木与机场工程系,南京211106 [2]桂林理工大学土木工程学院,桂林541004 [3]香港理工大学土木及环境工程学系,中国香港999077

出　　处：《中国科学:技术科学》2025年第4期717-728,共12页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:52078251,52211530086,52321165649,52108456);江苏省自然科学基金(批准号:BK20211518,BK20210309);中央高校基本科研业务费专项资金(编号:NS2023038)资助项目。

摘　　要：风-浪联合发电结构是由叶片、机舱、塔筒、浮台、浮子和系泊组成的多柔-刚性多体动力学复杂系统,其中系泊是确保极端海况下风-浪联合发电结构体系抗风稳定性的核心构件和最终屏障.为探究风-浪联合发电结构体系断缆失稳机理与判别准则,本文设计提出了一种集成半潜式风力机和垂荡式浮子的新型风-浪联合发电结构体系,基于model coupling toolkit(MCT)耦合平台建立了WRF-SWAN-FVCOM(W-S-F)中尺度实时耦合模拟方法,分析了台风Meranti过境全过程中台风-浪-流时空演变,结合中/小尺度嵌套降阶模拟方法(WRF-CFD/CSD)探究了风-浪联合发电结构体系非线性振动响应规律,最后根据断缆失稳全过程揭示了结构体系跳跃失稳机理并建立了失稳判别准则.结果表明:中尺度W-S-F耦合模拟比单WRF模式的台风路径误差减小了33.4%,风速精度提高了12%;系泊断裂全过程风-浪联合发电结构体系运动遵循跳跃失稳机理,主系泊和侧系泊断裂后位移分别以纵荡和横荡为主;当位移失稳指标w≥3%时,结构体系因系泊断裂由前平稳阶段进入跳跃失稳阶段,最后进入后平稳阶段.本文研究结论可为风-浪联合发电结构体系稳定性设计提供理论基础.The wind–wave co-generation structure is a complex multiflexible–rigid dynamic system consisting of blades,nacelle,tower,pontoon,float,and mooring.Among these,the mooring is the core component and ultimate safeguard for maintaining the structural stability of the system under extreme sea conditions.To explore the instability mechanisms and criteria of the wind–wave cogeneration structure in the event of mooring cable failures,this study introduces a novel structural system integrating a semisubmersible wind turbine with a pendant float.A mesoscale real-time coupling simulation method combining WRF,SWAN,and FVCOM(W-S-F)is developed and implemented using the model coupling toolkit platform.The spatiotemporal evolution of the typhoon–wave–current interaction during the entire transit of Typhoon Meranti is analyzed.The nonlinear vibration response behavior of the wind–wave co-generation structural system is investigated using the mesoscale nested downscaling simulation method(WRF-CFD/CSD).Furthermore,the jumping instability mechanism of the structural system is revealed based on the complete process of cable breakage,and instability criteria are established.The results show that the mesoscale W-S-F coupled simulation reduces the typhoon path prediction error by 33.4%and improves wind speed accuracy by 12%compared with the standalone WRF model.The motion of the wind–wave co-generation structural system during the mooring breakage process conforms to the jump instability mechanism.The displacements following the rupture of the main mooring and side mooring are mainly governed by longitudinal and transverse oscillations,respectively.At a displacement destabilization index w of≥3%,the structural system transitions from the presteady stage to the jump instability stage owing to mooring failure and ultimately reaches the poststeady stage.The findings of this study offer a theoretical foundation for the stability design of wind–wave co-generation structural systems.

关 键 词：风-浪联合发电结构体系 台风-浪-流 系泊断裂 失稳机理 判别准则 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]