An Effective Method for Determining Finite Element Model Parameters of Rotor Elastic Support System

Abstract

A finite element model of the elastic support rotor system based on the corresponding experimental model was established. According to the principle of two types of model with an equal first order critical speed, the equivalent stiffness and damping of a rolling ball bearing support system with rubber rings determined by experiment were transferred into the finite element model. Then, the dynamic behavior of rotor systems with symmetric and asymmetric structure, different support system stiffness and support span were calculated and analyzed respectively. At last, the influence of the rotor structural parameters on the equivalent stiffness of elastic bearing support system obtained by experiment was pointed out.

Study on the Dynamic Characteristics of the Winding Head

“…The Winding head consists of three cantilever hollow cylindrical parts, 3 sets of rolling bearings with rubber rings in its outer rings are arranged between the fixed part and the rotating movement of parts, and fit clearance is coated with high viscosity oil, which form rolling bearing flexible supporting system. The researchers [1] had calculated the equivalent stiffness and equivalent damping of the rolling bearing flexible supporting with rubber rings by test method, and the calculated value is a significantly difference with conventional rolling bearing system without rubber rings, especially the equivalent stiffness of the system decreases from 10 7 (2×10 7 ～1×10 8 N/m) to 10 4 (3.54×10 4 N/m). The dynamic characteristics of the bearings have important influence on the dynamic characteristics of rotor bearing system [2,3].…”

“…The dynamic characteristics of the bearings have important influence on the dynamic characteristics of rotor bearing system [2,3]. By means of supporting stiffness of reference [1], a model of flexible support rotor system had been established in reference [4], analyzed dynamic characteristics of the flexible support rotor system, and calculation result shows that the flexible support plays an important role in regulating the position of the dynamic response the peak of the rotor system.…”