第三章简要分析了柔性杆的扭转振动。
In chapter three, the torsional vibration of the flexible bar was analyzed.
本文应用可积的一类线性微分方程求出了非均质变截面弹性直杆振动问题的一个精确解，我们应用这一精确解验证了渐近解的精确度。
This paper gives an exact solution for free vibration of a physically nonuniform straight bar with varying section by the use of a class of integrable linear ordinary differential equation.
直接把均匀杆纵向振动的数学模型用于弹簧的动力分析。
The mathematical model of longitudinal vibration bars is directly used for the dynamic analysis of helical springs.
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