Dielectric Elastomer Damper Design

Dielectric elastomers are widely concerned by scholars at home and abroad because of its advantages of low cost,fast response,large deformation,light weight and high energy density,and have been applied to soft robots,sensors,energy collection and other fields.Based on the large deformation characteristics of dielectric elastomer materials,the application of dielectric elastomer materials in the field of active vibration reduction has broad prospects.Due to the nonlinear deformation characteristics of dielectric elastomer materials,the mechanical-electrical coupling characteristics of dielectric elastomer materials need to be studied.The research on dielectric elastomer materials in the field of vibration reduction is less and not deep enough,so it needs to be further studied.Therefore,based on the equilibrium state equation of dielectric elastomer material,the static force electric coupling model of dielectric elastomer shock absorber is derived in this thesis.A dielectric elastomer shock absorber prototype was made,and a vibration isolation test platform was built to test the vibration isolation performance of dielectric elastomer shock absorber.Finally,a new dielectric elastomer damper was designed.The main research contents are as follows:1)The equilibrium state equations of ideal dielectric elastomers described by real and nominal variables are derived,and the advantages and disadvantages of different hyperelastic material models are analyzed.The electrode formability of dielectric elastomers under different deformation modes is studied.It is found that the Electrodegenic deformation properties of dielectric elastomers under pure shear tensile mode is better than that under equal biaxial tensile mode and uniaxial tensile mode.Taking acrylic acid VHB4910 as sample,the dielectric constant of dielectric elastomer material under different pre-tensile parameters was tested.The elastic modulus of dielectric elastomer material was obtained by uniaxial tensile test,which provided the basic parameters of dielectric elastomer material for subsequent shock absorber design.2)Based on the pure shear mode of dielectric elastomer material,dielectric elastomer shock absorber was designed and its static mechanical-electrical coupling model was derived.A prototype dielectric elastomer shock absorber was fabricated.Finally,a test platform is built to test the output displacement characteristics of dielectric elastomer shock absorber.The results show that the damper has a good displacement response performance in the breakdown voltage range.When the voltage is 5k V,the displacement response of dielectric elastomer damper is 1.5mm.3)The vibration isolation performance of dielectric elastomer shock absorber is studied.The vibration isolation performance of dielectric elastomer absorber under different excitation frequencies and voltages was analyzed,and a test platform was built to test the vibration isolation performance of dielectric elastomer absorber under different excitation frequencies and voltages.The experimental results show that the dielectric elastomer damper has good vibration isolation performance in the range of50HZ-100 Hz.