首先应用小挠度弹性理论，在一些合理简化假设的基础上，推导自平衡索桁架的初始刚度、松弛刚度及临界松弛荷载公式。
Based on the small-deflection elastic theory and some simplified assumptions, the initial stiffness, the slack stiffness and the critical slack load have been derived theoretically.
事实表明悬索结构在外激作用下，下部结构可能会发生飘浮，致使连接下部结构和主索的吊索部分产生松弛。
Facts indicated that under external loads suspension structure might float, so that parts of the slings which connected the main cable with the below suspension structure might be relaxed.
本文介绍了考虑索单元松弛跟踪的空间索桁结构非线性有限元全过程分析方法。
A nonlinear finite element method considering the slack of cable elements is proposed in this paper for analysis of spatial cable truss structures.
桁端的帆角立即落下，松弛的帆挺着大肚子漂浮在水面上。我无论如何用力也拉不动帆索，我也只能做到这个程度了。
The peak dropped instantly, a great belly of loose canvas floated broad upon the water, and since, pull as I liked, I could not budge the downhall, that was the extent of what I could accomplish.
前者涉及到松弛态索杆体系的找形分析，后者可简化为平面连杆机构的运动形态分析。
The shape-finding analysis of slack cable-bar assemblies is involved in the former topic, and the motion tracing analysis of planar pin-bar mechanisms can describe the latter topic well.
前者涉及到松弛态索杆体系的找形分析，后者可简化为平面连杆机构的运动形态分析。
The shape-finding analysis of slack cable-bar assemblies is involved in the former topic, and the motion tracing analysis of planar pin-bar mechanisms can describe the latter topic well.
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