A Rotor Unbalance Identification Method Based on Computational Inverse Technology

Abstract

The invention relates to a method for identifying rotor unbalance degree based on reverse calculation technology, which includes: determining the number of unbalanced forces to be identified according to the structure of the rotor to be dynamically balanced; adding unbalanced forces to the transient response analysis model , find the response measuring point that has a correlation between the response displacement and the applied force point, and obtain the corresponding dynamic response through experimental measurement; use the structure of the rotor system and the assumed unit impulse force to calculate the distance from the load action point to the response measuring point through simulation. Kernel function response, establish the kernel function matrix and modify it; based on the dynamic response obtained above and the modified kernel function matrix, the unbalanced force is obtained by solving the modulus of the minimum residual error in the regularized functional, and then the amplitude of the unbalanced quantity is obtained and phase, and dynamically balance the structure of the rotor system accordingly; the invention only needs one experiment and several measuring points to quickly obtain the unbalance degree of the rotor, and can not only accurately and effectively obtain some dynamic loads that are difficult to determine by traditional methods , and greatly reduce the number and cost of physical experiments.

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...

AI Technical Summary

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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