Research On The Strategy Of Vibration Suppression For A Flexible Thin Plate Using Active And Passive Hybrid Mode

The thin plate structure has been widely used in various fields because of its simple structure,light weight and so on.The thin plate structure itself has higher flexibility,which is likely to cause greater vibration in practical engineering applications,resulting in poor effects of work accuracy or fatigue loss.The use of various active or passive modes of vibration suppression is an effective means to solve the above problems.This subject is designed to control the vibration of the thin plate structure by using the controller of the active and passive hybrid suppression strategy based on the piezoceramic patch and the damping patch.Firstly,based on Kirchhoff's thin plate theory,a simplified structure corresponding to a thin plate structure,theoretical model of rectangular plate is established.The dynamic equation is derived,and the modal analys is is carried out,and the variation laws and characteristics of the resonant frequency and corresponding modal vibration of each order are analyzed and compared.Based on the theoretical model of the rectangular plate,a active and passive hybrid mode controller based on piezoelectric patch and damping patch is designed.Based on the theory of piezoelectric effect,material mechanics and vibration mechanics,the theoretical model of the hybrid controller is established by Rayleigh-Ritz method,and its dynamic characteristics and performances are analyzed.Based on the commercial finite element software COMSOL Multiphysics,the dynamic performance of the vibration suppression device under three cases of active mode,passive mode and active and passive mode is numerically simulated.Based on the simulation results,the number and position distribution of the active and passive control elements of the three types of vibration suppressor are optimized and configured.The damping patch and piezoelectric patch are arranged near the large strain position of the rectangular plate structure and near the source of the vibration source.The better effect of vibration suppression can be achieved.The experimental test platform is set up,and the experimental research on the vibration suppression effect of the three kinds of suppressors designed above is carried out respectively.Through the simulation and experimental data,it is known that the three vibration suppression schemes have a good effect on the vibration of the rectangular plate,the pure active control scheme[1] has 45.08%,36.22% and 12.56% suppression rates for the first three order vibration of the rectangular plate,the pure passive control scheme has 37.195%,40.88% and 11.395% suppression rates for the first three order vibration of the rectangular plate,the active and passive hybrid mode control scheme has 74.43%,67.68% and 24.395% suppression rates for the first three order vibration of the rectangular plate.It is obvious that the active and passive hybrid control scheme has better vibration suppression effect.The research of this topic provides a certain way of thinking for solving the problem of vibration suppression of thin plates.