结果说明：改变隔振元件的间距能调整扭转振动的固有频率的大小。
The results showed that the mount spacing can be varied to adjust the natural frequency of the rotational mode.
分析结果表明：操纵系统对旋翼桨叶扭转振动固有特性的影响是一个值得注意的问题。
The results obtained by these analyses show that the problem of the influence of control system on modal characteristics of the rotor blades torsional vibration is noticeable.
通过对几种不同的隔振形式的分析，得到了扭转振动的固有频率与线性振动的固有频率之间的关系。
By analysing some different types of isolating configurations, the relations between the natural frequency of rotational vibration and that of the linear vibration have been found.
研究了在相同曲率下不同跨度的曲线箱梁的固有振动特性，以及曲线梁的扭转振型对曲线梁动力反应的贡献。
The natural dynamic characteristics of curved box girders with the same radius of circle and different curved length are studied.
在对旋转抽油杆柱的扭转振动分析的基础上，给出了各阶扭转振动固有特性参数的计算式。
On the basis of the analysis of the twisting vibration of rotary sucher-rod string, a formula of calculating every harmonic vibration eigenfrequency is presented.
在对旋转抽油杆柱的扭转振动分析的基础上，给出了各阶扭转振动固有特性参数的计算式。
On the basis of the analysis of the twisting vibration of rotary sucher-rod string, a formula of calculating every harmonic vibration eigenfrequency is presented.
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