摘要
通过长细比为6的方形断面柱体单自由度气动弹性模型的风洞试验,利用随机减量方法对这类高层建筑的横风向及顺风向气动阻尼进行了估算,分析了折减风速大小、结构所处风场类型及结构阻尼对气动阻尼的影响规律,拟合得到实用计算公式,可供规范修订时参考。
Along-wind and across-wind aerodynamic damping ratios of a square cylinder with aspect ratio of 6 are identified from the dynamic responses of its SDOF aeroelastic model with random decrease method. Parametric studies of the effects of wind velocity, wind condition and structural damping on the aerodynamic damping are performed. Formulas of the aerodynamic damping ratios are put forward through curve fitting technique.
出处
《工程力学》
EI
CSCD
北大核心
2004年第1期26-30,47,共6页
Engineering Mechanics
基金
国家杰出青年科学基金(59725818)
教育部高等学校骨干教师资助计划联合资助
关键词
防灾减灾工程及防护工程
风工程
风洞试验
超高层建筑
气动阻尼
disaster prevention and mitigation engineering
wind engineering
wind tunnel test
super highrise building
aerodynamic damping
