Effects of Wind-Wave Misalignment on a Wind Turbine Blade Mating Process:Impact Velocities,Blade Root Damages and Structural Safety Assessment  

风浪方向不一致对风机叶片对接过程中撞击速度、叶根损伤和结构安全评估的影响分析

作　　者：Amrit Shankar Verma Zhiyu Jiang Zhengru Ren Zhen Gao Nils Petter Vedvik 

机构地区：[1]Department of Marine Technology,Norwegian University of Science and Technology(NTNU),Trondheim,Norway [2]Centre forMarine Operations in Virtual Environments(SFIMOVE),NTNU,Trondheim,Norway [3]Faculty of Aerospace Engineering,Delft University of Technology(TU Delft),2629 HS Delft,Netherlands [4]Department of Engineering Sciences,University of Agder,4879 Grimstad,Norway [5]Department of Mechanical and Industrial Engineering,NTNU,Trondheim,Norway

出　　处：《Journal of Marine Science and Application》2020年第2期218-233,共16页船舶与海洋工程学报（英文版）

基　　金：The study is a part of SFI MOVE projects funded by the Research Council of Norway,NFR project number 237929.

摘　　要：Most wind turbine blades are assembled piece-by-piece onto the hub of a monopile-type offshore wind turbine using jack-up crane vessels.Despite the stable foundation of the lifting cranes,the mating process exhibits substantial relative responses amidst blade root and hub.These relative motions are combined effects of wave-induced monopile motions and wind-induced blade root motions,which can cause impact loads at the blade root’s guide pin in the course of alignment procedure.Environmental parameters including the wind-wave misalignments play an important role for the safety of the installation tasks and govern the impact scenarios.The present study investigates the effects of wind-wave misalignments on the blade root mating process on a monopile-type offshore wind turbine.The dynamic responses including the impact velocities between root and hub in selected wind-wave misalignment conditions are investigated using multibody simulations.Furthermore,based on a finite element study,different impact-induced failure modes at the blade root for sideways and head-on impact scenarios,developed due to wind-wave misalignment conditions,are investigated.Finally,based on extreme value analyses of critical responses,safe domain for the mating task under different wind-wave misalignments is compared.The results show that although misaligned wind-wave conditions develop substantial relative motions between root and hub,aligned wind-wave conditions induce largest impact velocities and develop critical failure modes at a relatively low threshold velocity of impact.

关 键 词：Wind turbine blade Wind-wave misalignment MONOPILE Marine operation Finite element analysis T-bolt connections 

分 类 号：U661[交通运输工程—船舶及航道工程]