unbraced frame

Through analyzing to several forms of frames,whether the structure is still a braced frame or an unbraced frame are studied, and the variations of their deflection are discussed, when the sections of elements or the edge of the structure are changed.

通过对几种框架结构的分析,讨论了框架杆件断面及框架边界等条件变化,对有侧移或无侧移框架以及框架侧移量的影响。

Compute method of estimate the response critical state of the close-type sprinkler under the roof without sideward-wall;

无侧限屋顶下闭式喷头启动临界状态的计算方法

The structure and the working principle of a new kind of hourglass worm gearing,which is called non-backlash hourglass worm gearing,are introduced.

阐述了一种新型环面蜗杆传动——无侧隙双滚子包络环面蜗杆传动的结构和传动原理。