Testing method of motor damping feature recognition

Abstract

The invention relates to a testing method of motor damping feature recognition and belongs to the field of motor structure acoustic design. The testing method is especially applicable to the testing researches of the damping features of various military and civil large motors and can be used as reference of simulation calculation to guide motor vibration noise response calculation. The testing method aims to overcome the defects of existing motor damping feature recognition methods and the defects of traditional motor damping setting. Different assembling structures of a motor is achieved by disassembling and assembling, a vibration exciter response testing platform is built, an electromagnetic exciter and closed-loop control are used to produce exciting force with given amplitude and frequency so as to test the vibration response of the different assembling structures, the damping features of the different assembling structures of the motor is acquired through excitation-response testing results to serve as the reference of subsequent simulation calculation and guide motor vibration response calculation, and calculation model accuracy is increased greatly.

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

Images