Theoretical and Experimental Research on Quasi-zero Stiffness Vibration Isolation Seats
In order to solve the problem of vibration isolation at low frequency in the field of car seats,a seat model is set up by using the classic three-spring quasi-zero stiffness(QZS)vibration isolator,and its performance of vibration isolation is evaluated via simulation and experiment methods.Firstly,the effects of parameters of the model on QZS are discussed and the QZS conditions are obtained for the model.Next,the QZS seat is established and simulated by ADAMS,and the theoretical and simulated displacement transmissibility is of better consistency.Then,a prototype of a three-spring QZS seat is fabricated,and its QZS feature is adjusted by static experiments.Finally,the QZS prototype is excited by using the vibration table under harmonic displacement excitations of large amplitudes in the frequency range of 1-10 Hz,and the Polytec laser vibrometer is used to measure the displacement responses of the vibration table and the seat.The vibration isolation performance of the QZS seat is evaluated through the experimental displacement transmisibility,and the correctness of the theoretical analysis is verified.Compared with the corresponding linear stiffness seat,the three-spring QZS seat has wider frequency range of vibration isolation and smaller transmissibility.This study provides an experience for studying practical application of QZS seats and also points out the difficulty in study of the QZS seats in the conclusion.
vibration and wavequasi-zero stiffnessoblique springsvibration isolatorseatsdisplacement transmissibility
万方数据
维普
