Kinetic modeling method for rotor system with insufficient interference force-eccentric coupling fault

Abstract

The invention provides a kinetic modeling method for a rotor system with insufficient interference force-eccentric coupling fault, and the method comprises the steps of building a disc shaft gap contact model based on a rub-impact model of a Hertz contact theory; meanwhile, according to the structural vibration principle of the rotor system, adding an eccentric fault into the rotor system; combining a disc shaft contact theory with a structure vibration model, so that a kinetic model of the eccentric coupling fault rotor system with insufficient interference force is established. When the model is established, it is assumed that the turntable is installed at the positive part of the shaft, and in order to research the characteristics of a disc shaft loosening eccentric coupling fault system, whirling influences possibly caused by other parts on the rotor are ignored. Aiming at the complex and diverse working conditions of the rotor system in engineering practice, the method employs thedisc-shaft contact theory and the vibration principle of the rotor system to establish the interference force deficiency eccentric coupling fault model, accords with the engineering practice better,and can analyze the influence of the interference force deficiency and the eccentric fault on the rotor system at the same time.

Description

technical field [0001] The invention relates to a dynamic simulation technology, in particular to a dynamic modeling method for a rotor system with insufficient interference force-eccentric coupling fault. Background technique [0002] Looseness fault is a common fault in rotating machinery, and there are two types of looseness faults: looseness of rotating parts and looseness of non-rotating parts. As the main working part of the rotor machine, the disc shaft part has a complex and diverse working environment and is prone to failure. When the disc shaft is loose, the looseness of the disc shaft will lead to an increase in the vibration of the entire rotor system, and other twin faults will also occur. The vibration characteristics of the entire rotor system have a great impact; the eccentricity fault of the turntable will increase the vibration of the rotor system. When the looseness of the disc shaft and the eccentricity fault occur at the same time, the vibration characte...

AI Technical Summary

Problems solved by technology

[0005] In view of the above existing problems, the present invention provides a method for establishing a dynamic model of the rotor system due to insufficient interference force-eccentric coupling fault, which solves the existing problem of looseness between the rotating disk and the rotating shaft, and analyzes the impact of the loose coupling fault of the disk shaft on the rotor system. provide a basis for research related to rotor dynamics

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