大跨度空间结构风振响应计算分析

对某大跨度空间结构进行了风振分析研究，该结构具有频率极其集中的特点，在进行风振分析的过程中，考虑了高阶振型的影响。文中利用模态分析法求取了结构的动力特性，并在此基础之上选取了适当的模态进行了谱分析，获得了结构的动力响应，并最终得到结构的风振响应。通过分析发现了大跨度空间结构在脉动风作用下的某些响应特性，指出了大跨度空间结构进行风振分析需要注意的方面。

Wind- Excited Vibration Analysis of Long Span Structures

In the paper, Wind-excited vibration analysis of a long span structure was analyzed. The frequencies of the structure are concentrative. During the analysis the effect of the high mode was taken into account. The dynamical character of the structure was obtained by modal analysis. On the base of the character, the appropriate modes were selected to make a spectrum analysis. In the end the dynamical response and the wind-excited response have also been achieved. Some response characters under the action of the pulsating wind on the structure have been found through the analysis. At the same time, many attentions about the wind-excited vibration analysis are pointed out.