Research On Simulation Method Of Bolted Joint Surface And Prediction Of Vibration And Noise From Motor

The Bolted Joint Surface is widely used in mechanism, which has a big influence on the static and dynamic characteristics of the whole machine system. For the motor frame model, there is Bolted Joint Surface between the cover and the frame, the frame and the base. Thus, this paper analysis the modal of motor frame influenced by the different characteristics of Bolted Joint Surface. The simulation method of Bolted Joint Surface is also researched in this paper.As a common power device, the noise standard of motor has been to one of important quanty index. By using of the combination of ANSYS and SYSNOISE, the vibration and noise standard of75kW motor has been predicted.The main content of this paper is as followed:(1) On the basis of present studies, the system modal analysis scheme is been designed and the modal of motor frame influenced by different Bolted Joint Surface characteristic is analyzed.(2) The motor frame model is built by some kinds of different building method, then, the modal analysis is carried out by using of ANSYS. By contrast of the simulation and experiments results, the building method base on VDI2230is the most effective method which can be used in later FEM analysis applications of motor.(3) The75kW motor frame (including the stator、frame、cover) is built by Pro/E, and then the finite element model is got by using the method base on VDI2230. The modal analysis is implemented by using of ANSYS.(4) The magnetic density is analyzed, when the stator/rotor is60/50. And the radial magnetic force of stator is worked out by the magnetic density. With the help of radial magnetic force, the motor frame’s transient response is established. And the transient response is verified by comparing it with experiment results.(5) The boundary element model of motor is built by using of Hypermesh. Through the spectral analysis program written by APDL, convert the nodal speed date change over time to frequency on the surface of motor frame structure. And the structure radiation noise of motor is calculated by the software of SYSNOISE.