单桩式海上风力机整体化地震反应  

Integrated seismic response of monopile supported offshore wind turbines

作　　者：席仁强 杜修力[1] 王丕光[1] 许成顺[1] 许坤[1] XI Ren-qiang;DU Xiu-li;WANG Pi-guang;XU Cheng-shun;XU Kun(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China;School of Mechanical Engineering and Rail Transit,Changzhou University,Changzhou 213164,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]常州大学机械与轨道交通学院,江苏常州213164

出　　处：《浙江大学学报（工学版）》2021年第4期757-766,共10页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51808061,51722801);国家重点研发计划资助项目(2018YFC1504302).

摘　　要：为了探讨风-波浪-地震共同作用下单桩式海上风机(OWTs)的动力行为,以National Renewable Energy Laboratory(NREL)5 MW风力发电机为研究对象,将风、地震作为独立事件,根据风-波浪统计关系确定波浪谱参数.改进FAST软件以模拟土-结相互作用,考虑停机、运行和应急停机3种工况,采用气动-伺服-水动-弹性耦合方法分析海上风机地震响应.算例表明,工作状态显著影响海上风机支撑结构的运动和内力,规律与地震强弱有关;地震动显著影响叶片挥舞振动速度;在风-波浪-地震的共同作用下,海上风机支撑结构危险截面剪力和弯矩峰值超过极端风-波浪作用效应.The 5 MW wind turbine created by National Renewable Energy Laboratory(NREL)was taken as the prototype in order to analyze the dynamic behavior of monopile supported offshore wind turbines(OWTs)excited by the combination of wind,wave and earthquake.Then parameters of the wave spectrum were determined by the statistical relationship between wind and wave assuming that wind and earthquake were independent events.The FAST code was modified to simulate the soil-structure interaction,and the seismic response of OWTs was analyzed by using aero-servo-hydro-elastic coupled method.The running,park and emergency shutdown operational conditions were included.Results show that operational conditions significantly influence the deformations and internal forces of the support structure of wind turbines,and the principles are associated with the intensity of earthquakes.The oscillation velocity of the blade is considerably influenced by earthquakes.The amplitudes of shear and bending moment of critical section for the support structure may exceed those excited by extreme wind-wave under the combined excitation of wind,wave and seismic.

关 键 词：单桩式海上风机 风-波浪-地震共同作用 风-波浪统计关系 土-结相互作用 地震响应 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]