D FEM analysis model is adopted for the stability analysis in construction including hoisting and closing single steel tubular arch rib and service stages respectively.
采用空间杆系计算模型对包括单根钢管拱肋吊装合龙在内的施工和运营阶段进行稳定性分析。
2
It gave a research result on the manufacture technology of arch tube truss, and put forward firstly the instability hoisting technology of single truss.
探索出圆拱形管桁架的分段制作、现场拼接技术，首次开发了单榀桁架非稳定性吊装技术。
3
YTD2 series single pushrod electric-hydraulic thrusters are mainly used in hoisting, transportation, metallurgy, mines, ports and civil constructions as driver of mechanism brake.