摘要
通过开展附加颗粒调谐质量阻尼器(particle tuned mass damper,PTMD)风力发电机结构模型的自由振动试验和振动台试验,研究PTMD自身参数对其减振性能的影响规律,检验PTMD用于降低风力发电机结构不利振动的合理性与有效性,揭示随机激励下耦合系统的工作机理。借助自由振动试验研究了设计参数对PTMD减振性能的影响规律,初步确定了系统的参数配置。同时,通过地震波激励工况、风荷载激励工况和风-地震耦合荷载激励工况对风力发电机结构使用PTMD进行振动控制的合理性与有效性进行了检验,进一步揭示随机激励下耦合系统的减振机理。试验结果表明:颗粒-腔体质量比和频率比参数分别取值0.27和0.97时PTMD表现出较好的减振性能;3种随机激励下PTMD能够有效抑制风力发电机结构的动力响应,其中,El Centro波作用下,PTMD对结构顶部加速度和位移峰值响应的控制效果分别为5.52%和7.73%,而对均方根响应的控制效果则高达33.3%和32.08%。由此可见,PTMD对均方根响应的控制效果优于峰值响应。对比传统调谐质量阻尼器(TMD)结果可知,经合理设计的PTMD具有更佳的减振效果,且PTMD的工作冲程更小,效率高达20%以上,因此更适用于具有空间局限性的风力发电机结构。此外,叶片转动产生的空气阻力对风力发电机结构响应起到抑制作用,在一定程度上间接地削弱了PTMD的减振性能。
The free vibration test and shaking table test of the wind turbine structure model coupled with particle tuned mass damper(PTMD)were carried out to investigate the influence law of parameters of PTMD on its control performance,and validate the rationality and effectiveness of PTMD for reducing the adverse vibration of wind turbine structure,and further reveal the working mechanism of the coupled system under random excitation.In this study,the influence law of design parameters on the control performance of PTMD was investigated based on free vibration test,and the parameter configuration of the system was initially determined.Meanwhile,the rationality and effectiveness of using PTMD for vibration control of wind turbine structures based on seismic wave excitation conditions,wind load excitation conditions and wind-seismic coupled load excitation conditions were examined,and the damping mechanism of the coupled system under random excitation was revealed.The experimental results show that the PTMD exhibits better control performance when the particle-to-cavity mass ratio and frequency ratio parameters are taken as 0.27 and 0.97,respectively.The PTMD can effectively suppress the dynamic response of the wind turbine structure under three kinds of random excitations,in which the control effect of PTMD on the peak response of acceleration and displacement at the top of the structure subjected to the El Centro wave is 5.52%and 7.73%,respectively,while the control effect on the root mean square response is as high as 33.3%and 32.08%,which shows that the control effect of PTMD on the root mean square response is better than that on the peak response.Compared with the results of conventional tuned mass damper(TMD),it can be seen that the reasonably designed PTMD has better control effect,and the PTMD has a smaller working stroke with an efficiency of more than 20%,so it is more suitable for wind turbine structures with space limitations.Moreover,the air resistance generated by the blade rotation plays a suppressing role
作者
鲁正
荣坤杰
马晨智
LU Zheng;RONG Kunjie;MA Chenzhi(Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2023年第4期267-275,共9页
Journal of Building Structures
基金
国家自然科学基金项目(51922080,52178296)
上海市优秀学术带头人计划(20XD1423900)
中央高校基本科研业务费专项(11080)。
