论文部分内容阅读
提出一种简单判别共振响应模态耦合效应的分析方法,该方法综合考虑结构的动力特性和风荷载特性,定义了共振响应模态耦合系数。依据该系数,通过几个特征参数(如结构模态和风荷载信息)就可以快捷的判断模态间共振响应耦合效应强弱,实现对共振响应耦合主导模态的选取。在此基础上,给出了大跨屋盖结构考虑模态间耦合效应的共振响应实用组合方法。最后,将该方法用于国家体育场屋盖结构风致动力响应分析,验证了其有效性。
A simple analytical method to determine the modal coupling effect of resonance response is proposed. The method takes into account the dynamic characteristics and the wind load characteristics of the structure, and defines the modal coupling coefficient of resonance response. Based on this coefficient, several characteristic parameters (such as structural modal and wind load information) can be used to quickly determine the strength of the coupling effect between modes to achieve the coupling of resonance modes. On this basis, the practical combination method of resonance response considering the mode coupling effect of long-span roof structure is given. Finally, the method is applied to the wind-induced dynamic response analysis of the roof structure of the National Stadium, and its effectiveness is verified.