考虑轴承刚度的转子系统动力学相似模型设计

针对轴承-转子系统的动力学相似实验模型的设计问题,提出一种使实验模型与原型固有特性一致的缩尺几何畸变模型设计方法,并进行了实验验证.首先,采用积分模拟法导出转子系统的动力学相似关系,根据量纲分析理论建立了轴承支撑刚度的相似关系.基于此设计了满足固有频率特性与原型相同的相似模型,并对相似模型同原型进行ANSYS仿真对比分析.为进一步验证所提出的设计方法的正确性和有效性进行了实验,验证了所提出的动力学相似设计方法的正确性.

Design of Dynamic Similarity Model of Rotor System Considering the Bearing Stiffness

To solve the design problem of dynamic similarity model experiment of bearing-rotor system， a design method of scale geometric distortion model was proposed. This model could keep the same intrinsic characteristics between the prototype and experimental verification. First， the dynamic similarity relations of rotor system were deduced by adopting integral simulation method. According to the theory of dimension analysis， the similarity relation of bearing support stiffness was established. Based on this， the model was designed to satisfy the intrinsic characteristic of prototype. The ANSYS simulation contrasts of the prototype and model were given. In order to demonstrate the validity of this method， experimental verification was given to verify the validity of the proposed design method of dynamic similarity.