考虑土-结相互作用的风力发电塔模型结构振动台试验研究  

Shaking table testing of a scaled wind turbine structure model considering soil-structure interaction

作　　者：丁艳琼 聂明刚 徐亚洲[1,2] 白国良 Ding Yanqiong;Nie Minggang;Xu Yazhou;Bai Guoliang(School of Ciril Enginering,Xi'an Unitersiry of Architecture and Techology,Xi'an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi'an 710055,China.)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《土木工程学报》2024年第10期25-32,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(52008339);中国博士后科学基金(2022MD723815)。

摘　　要：土-结相互作用(SSI)对结构动力响应会产生显著影响。鉴于此,文章开展考虑SSI的缩尺“风力发电塔-基础-土体”系统整体振动台试验研究,分析风力发电塔模型结构的动力特性,在记录地震动作用下的加速度响应和位移响应,以及SSI对模型结构动力特性的影响。研究表明:SSI对结构的动力特性,特别是结构的自振频率,有显著影响;风力发电塔结构塔筒中部加速度响应最大,而塔筒底部位移角响应最大;模型结构相对于地面的最大位移角在3%~4%,高于一般钢结构设计限值,在风力发电塔结构设计中应予以重视。此外,提出了一类基于Butterworth数字滤波器的两步滤波方法,并对滤波器参数取值进行了研究,结果表明该方法有效解决了加速度积分漂移问题。A shaking table test was conducted on a scaled‘wind turbine structure⁃foundation⁃soil’system,so the dynamic characteristics of the wind turbine structure as well as the influence of soil⁃structure interaction(SSI)on its dynamic behavior can be analyzed.The accel⁃eration and displacement responses of the wind turbine structure excited by recorded seismic ground motions were investigated.Research results revealed that SSI has a significant effect on the dynamic behavior of the structure,especially on the natural frequency of the structure.The maximum acceleration of the wind turbine structure was observed at the central part of the tower tube,while the maximum displacement drift angle occurred at the bottom of the tower tube.A maximum displacement drift angle ranging from 3%to 4%with respect to the ground exceeded the typical design limit for steel structures,emphasizing the need for its careful consideration in wind turbine structure design.Additionally,a two⁃step filtering method based on Butterworth digital filter was proposed,the values of the filter parameter were studied,and the results show that the proposed method can effectively solve the problem of baseline drift.

关 键 词：风力发电塔 振动台试验 SSI 抗震性能 

分 类 号：TU391[建筑科学—结构工程]