摘要
研究了索膜结构在脉动风作用下的动力特性。采用Wilson-q逐步积分法和Newton-Raphson迭代法推导了索膜结构在抖振力作用下的非线性动力增量平衡方程,求得结构的时程响应曲线。通过实例分析,探讨了结构参数变化对自振频率的影响;研究抖振力作用下索膜结构响应的频谱特性,从而得出索膜结构的抖振响应特性。
A time domain method was developed to study buffeting dynamic properties of cable -membrane structures under turbulent wind loads. Nonlinear dynamic equilibrium equations of cable-membrane structures under buffeting forces were derived and dynamic responses of such structure in time domain were obtained by Wilson-9 integral and Newton-Raphson method. Examples were provided to study the buffeting dynamic properties of membrane structures. The effects of structural parameters on frequencies of free vibrations of membrane structures were discussed. Frequency spectral properties of buffeting responses are analyzed and properties of buffeting responses for cable-membrane structures under buffeting forces are obtained.
出处
《工程力学》
EI
CSCD
北大核心
2004年第3期61-65,共5页
Engineering Mechanics
基金
河海大学科技创新基金资助项目(2003411043)
关键词
索膜结构
动力特性
非线性分析
抖振
Atmospheric turbulence
Buffeting
Cables
Dynamics
Structures (built objects)
Vibrations (mechanical)
