用缩约法分析空间刚架的固有振动

Analysis of Natural Vibration for Spaceframes by Reduction Method

为了弄清空间刚架楼板平面内刚度对结构动力特性的影响,本文采用质量缩约模型对不同层数空间刚架的动力特性进行了分析。在相同层数的情况下,分别计算了长、短轴两个方向的固有振动,而在每个方向又作了各种类型的缩约计算,其结果可作为用模态法计算空间刚架动力响应时的参考。

In order to charify the effects of the in-plan stiffness of floors on the vibration character of spaceframes, a mass reduction model is used in the analysis of vibration characser for space frames with various storegs in this paper. The natural vibrations along both the longer and shorter directions have been calculated respectivety in case of buildings with the same storeg, and along each direction, various reduction calculations has been made. The results can be reffered to the calculation of vibration responses for space frames by the modal method.