non damping free vibration

In this paper, the alternate iteration method is used in static analysis of cable truss hybrid structural system, and the simplified non damping free vibration equations have been drawn.

　本文采用交替迭代法分析索—桁结构体系,并导出了这种杂交结构无阻尼自由振动的简化方程。

The alternate iteration method used for static analysis of cable-truss hybrid structural systemand its simplified non-damping free vibration equations have been developed in this paper.

本文采用交替迭代法分析索-桁结构体系，并导出了这种杂交结构无阻尼自由振动的简化方程，通过算例分析得出了一些对实际工程有益的结论。

This paper focuses on studying the Lie symmetries and conserved quantities of undamped free vibration for one-degree-of freedom systems.

研究了单自由度无阻尼自由振动的Lie对称性和守恒量,采用Lie对称性方法,对单自由度无阻尼自由振动体系的Lagrange方程,利用常微分方程在无限小变换下的不变性,建立Lie对称性的确定方程,得出了该系统的Lie对称性导致的守恒量的条件以及守恒量的形式。