Research On Static And Dynamic Test And Theoretical Of Metal Rubber Vibration Isolator

Design a good engine vibration isolation system for high power diesel engine can effectively reduce and improve the transmission of the engine vibration to the support base.Due to its heavy weight,poor working environment,small design space and other factors,this paper developed a metal-rubber vibration absorber for high power diesel engine of a model of military armored vehicles to carry out damping and support.This metal rubber vibration isolator has strong ability of bearing damping characteristics,high temperature resistant,corrosion resistance,radiation protection,and long service life etc,greatly improve the capability of vibration isolation system.This paper uses austenitic stainless steel wire as the damping material of the metal rubber vibration isolator.Weave it through the spiral,network laying,hook and stamping,and finally form the required damping element.It can be found out that the metal rubber vibration isolator’s stiffness characteristics through static and dynamic test.That is force-displacement curve,showing the trend of the first soft after the hard,and the frequency response curve will jump and resonance peak drift.Take wire diameter,relative density,pre-deformation and exciting force to consideration to analysis their impact on stiffness,damping characteristics and transmission rate,it can select out the suitable performance parameters for different models and conditions.Based on the nonlinear hard characteristic and the delay phenomenon of the metal rubber vibration isolator,and the variable stiffness and the variable damping are linearly equivalent,the theoretical analysis and research are carried out to explain the phenomenon of the frequency response curve’s jump and resonance peak drift.According to the nonlinear constitutive relation,the mathematical model of the metal rubber vibration isolator is established to carry out the parameter identification and calculation.Finally,through the effective verification of the response characteristic,the model can be used to reflect the actual working conditions and meet engineering application requirements.