摘要
针对近海风机在常遇荷载及极端荷载作用下的结构响应问题,以单桩式近海风机为研究对象,基于线性调频优化方法完成TMD参数设计。建立NREL 5MW海上风机有限元模型,采用时域分析法及频域分析法,以结构响应为评价指标,研究不同荷载作用下TMD对海上风机的减振效果。研究发现:(1)TMD对位移幅值控制率低于对均方根控制率,说明TMD对结构强度破坏影响较小,对结构疲劳破坏有较好的控制效果;(2)TMD仅可对自振频率附近频带进行调频减振,对波浪及地震荷载作用下结构响应的控制率有限;(3)波浪荷载作用下结构容易发生疲劳破坏,风、地震荷载作用下结构容易发生疲劳破坏及强度破坏。
Aiming at the structural response of offshore wind turbines under common and extreme loads,this paper takes a single pile OWT as the research object,completes the tuned mass damper(TMD)parameter design based on linear frequency modulation optimization method.Based on the time-domain and frequency-domain analysis methods,a finite element model of NREL 5MW offshore wind turbine,and structural response as an evaluation index,the paper discusses the vibration reduction effect of TMD on offshore wind turbines under different loads.The results shows:(1)The control rate of TMD on displacement amplitude is lower than that on root mean square,which means TMD has a relatively small impact on structural strength failure and has a good control effect on structural fatigue failure;(2)TMD can only perform frequency modulation and vibration reduction in the frequency band near the natural vibration frequency,and its control rate for structural response under wave and seismic loads is limited;(3)Under wave loads,structures are prone to fatigue failure,while under wind and earthquake loads,structures are prone to fatigue failure and strength failure.
作者
姚硕
陈鑫
YAO Shuo;CHEN Xin(School of Civil Engineering,SUST,Suzhou 215011,China)
出处
《苏州科技大学学报(工程技术版)》
2025年第2期1-6,共6页
Journal of Suzhou University of Science and Technology(Engineering and Technology Edition)
基金
国家自然科学基金项目(52178294)
江苏省高等学校自然科学研究重大项目(19KJA430019)
苏州市科技计划项目(SYG202113)。
关键词
海上风机
调谐质量阻尼器
振动控制
时程分析
offshore wind turbine(OWT)
tuned mass damper(TMD)
vibration control
time history analysis
