【摘要】 在屋盖同步测压风洞实验的基础上,该文采用CQC法对沈阳综合体育馆大跨屋盖进行了较为准确的空间风振分析,重点分析了多个空间振型对屋盖有代表结点动位移根方差响应的贡献,得到该体育馆的最大参振振型为40阶;并连同SRSS方法一起,详细讨论了振型交叉项对动位移根方差响应的影响,对屋盖结构不同的结点和不同的参振振型,振型交叉项可使响应增加或减少,在考虑足够多的参振振型数以后,振型交叉项对动位移较大的结点影响很小。更多还原

【Abstract】 On the basis of simultaneous pressure measurement in wind tunnel experiments,the spatial wind-induced vibration analysis was carried out for the long-span roof of Shenyang Gym with CQC Method.This paper is devoted to multi-modal contributions to displacement quadratic variance on the representative points at the roof and the maximum mode is 40th.Compared with SRSS Method,the effect of cross part of the mode on the dynamic displacement quadratic variance is discussed in detail.For example,the cross part can make the response increase or decrease for different roof points and modes,and taking into account of enough modes,it affects little on the points where larger dynamic displacements occur.更多还原