Rotor unbalancedness identification method based on calculation of reverse seeking technology

Abstract

The invention relates to a rotor unbalancedness identification method based on calculation of a reverse seeking technology. The method includes the steps that the amount of unbalanced force to be identified is determined according to a rotor structure which dynamic balance is to be conducted on; unbalanced force is added to a transient response analysis model, a response displacement and response measuring points relevant to a force application point are found out, and a corresponding dynamic response is obtained through experimental measurement; a kernel function response from a load action point to the response measuring point is calculated through a simulation method by means of the rotor system structure and assumed unit impulsive force, and a kernel function matrix is established and corrected; based on the obtained dynamic response and the corrected kernel function matrix, unbalanced force is obtained by solving the module of regularized functional minimum residual error, the amplitude and phase of the amount of unbalance are obtained, and dynamic balance processing is carried out on the rotor system structure accordingly. The unbalancedness of a rotor can be quickly obtained only through an experiment and several measuring points, dynamic loads difficult to determine through some traditional methods can be obtained accurately and effectively, and the number of times of physical experiments and cost are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of dynamic balance, in particular to a rotor unbalance degree identification method based on calculation inversion technology. Background technique [0002] At present, when the rotor is dynamically balanced, the commonly used method often requires multiple test runs to determine the calibration quality, which is time-consuming and laborious, especially for large rotors. In the rotor system, the degree of unbalance is divided into different grades according to certain standards, and the specific expression form of dynamic load is given, but since the dynamic characteristics of the structure itself are nonlinear functions of design variables or control parameters, there is a limitation on the dynamic load. sensitivity. Therefore, when there is a deviation between the set load mode in the code or standard and the actual dynamic load on the structure, the dynamic analysis and optimal design of the structure ma...

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a rotor unbalance identification method based on reverse calculation technology to solve the problem that the correction quality needs to be determined after multiple test runs in the existing rotor dynamic balance

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