节点文献
高层建筑气动阻尼识别的随机方法
Determination of Aerodynamic Damping of High-rise Buildings by Stochastic System Identification Techniques
【Author】 QIN Xian-rong, GU Ming, QUAN Yong, HUANG Peng(State Key Laboratory for Disaster Reduction in Civil Engineering, Tengji University, Shanghai, 200092)
【机构】 同济大学土木工程防灾国家重点实验室；
【摘要】 超高层建筑的气动阻尼是影响结构动力响应估计的重要因素。风场中的高层建筑受到的阻尼包括结构阻尼和气动阻尼两部分,其中的气动阻尼需要通过气弹模型风洞实验确定。本文提出采用一种随机系统识别方法——基于协方差估计的随机子空间方法(Covariance-driven Stochastic Subspace Identification,简称CSSI)来识别高层建筑的气动阻尼,识别直接在紊流风场中建筑物的随机响应的基础上进行,实验简单易行。风洞实验研究及其与相关文献结果的对比验证了采用这种方法识别高层建筑气动阻尼的可行性。
【Abstract】 Damping characteristics play an important role in response predictions of high-rise buildings. The damping of high-rise buildings is composed of the structural damping and aerodynamic damping. Aerodynamic damping is induced by the wind, and is often estimated by wind tunnel tests. In this paper, one of the stochastic system identification techniques, Covariance-driven Stochastic Subspace Identification(CSSI in short), was proposed to extract the aerodynamic damping of high-rise buildings from their random responses in turbulent wind. Wind tunnel tests were conducted to verify the effectiveness and feasibility of the proposed technique.
【Key words】 Aerodynamic damping； Modal parameter identification； Covariance-driven stochastic subspace identification； Wind-induced vibration； High-rise building；
- 【会议录名称】 第八届全国振动理论及应用学术会议论文集摘要
- 【会议名称】第八届全国振动理论及应用学术会议
- 【会议时间】2003-11
- 【会议地点】中国上海
- 【分类号】TU973.2
- 【主办单位】中国振动工程学会、中国力学学会、中国航空学会、中国机械工程学会、中国宇航学会