Based on theory of vibration mechanics, this paper analyzes the vibration mechanics model of rod string systematically.
从振动力学的理论出发，对现行抽油杆柱的振动力学模型进行了系统分析。
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。
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