A test method for identification of motor damping characteristics

Abstract

The invention relates to a test method for identification of motor damping characteristics, which belongs to the field of structural acoustic design of motors, and is especially suitable for experimental research on the damping characteristics of various large-scale motors for military and civilian use, and can be used as a reference basis for simulation calculations to guide the vibration and noise response of motors calculate. The purpose of the present invention is to make up for the shortcomings of the existing motor damping characteristic identification method, overcome the defects of the traditional motor damping setting, and provide a test method for motor damping characteristic identification. Obtain different assembly structures of the motor through disassembly and assembly, build a vibration exciter response test platform, use the electromagnetic exciter to generate an exciting force with a given amplitude and frequency using closed-loop control, test its vibration response, and pass the excitation-response test results Obtain the damping characteristics of different assembly structures of the motor, as a reference for subsequent simulation calculations, guide the calculation of the vibration response of the motor, and greatly improve the accuracy of the calculation model.

Description

technical field [0001] The invention relates to a test method for identification of motor damping characteristics, which belongs to the field of structural acoustic design of motors, and is especially suitable for experimental research on the damping characteristics of various large-scale motors for military and civilian use, and can be used as a reference basis for simulation calculations to guide the vibration and noise response of motors calculate. Background technique [0002] The size of the damping in the motor affects the vibration and noise level of the motor. At the same time, how to set the damping size affects the accuracy of the calculation when predicting the vibration and noise of the motor. The damping characteristics of the motor have its particularity. In addition to the damping characteristics of the general conventional steel structure, its particularity mainly includes the damping characteristics of the main joints in the motor, such as bolt connections, ...

AI Technical Summary

Problems solved by technology

At present, the exact mechanism of damping is still being researched, and the damping models are mostly obtained equivalently based on engineering experience. The existing damping measurement methods mainly include forced resonance method, forced non-resonance method, wave velocity method, finite element inversion method, etc., mainly It is for the measurement of material damping, and there is no test method for the structural damping of the combination. At the same time, in view of the complexity of the motor damping characteristics, when performing motor vibration and noise simulation calculations, the damping settings are often selected according to experience, and there is no reference basis. The calculated The vibration and noise response is often quite different from the test value, and the accuracy of the calculation model needs to be improved

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