基于单自由度的桨-轴回转振动特性分析

Analysis of Vibration Characteristics of Propeller/Shaft Based on Single Degree of Freedom

基于受简谐激励的单自由度系统产生振动的机理,从理论上分析了偏心质量所引起的桨-轴系统回转振动特性,利用幅频特性曲线和相频特性曲线分析该系统稳态响应的动力学特征,探讨系统转速和偏心质量对桨-轴系统回转振动的影响。同时基于Ansys/workbench平台建立了桨-轴系统回转振动模型并进行仿真计算,对理论分析结果进行验证。结果表明,利用单自由度受简谐激励振动模型来分析转子系统回转特性是可靠的、准确的。

Based on mechanics mechanism resulted from simple harmonic motion in single degree of freedom system, rotating vibration characteristics of propeller-shaft system caused by the eccentric mass is analyzed. Using the curve of amplitude frequency and phase frequency characteristic, the kinetic characteristics of the steady-state response of the system is analyzed, and the influence of rotating speed, vibration damping system the parameters of propeller shaft system is discussed. Numerical simulation is carried out to establish the shafting system of rotary vibration model in the Ansys/workbench environment.theoretical analysis and simulation results verify the method is reliable and accurate.