The Structural Design And Experimental Research Of ER Elastomer Shock Absorber

Mechanical Vibration is an inevitable problem in the field of Mechanical Designand manufacturing in engineering technology application. Now, the intelligentmaterials have been applied in machine vibration control by some experts andscholars, and many encouraging research results have been obtained. A recentemergence of a new intelligent material is ER elastomer, which not only inherits themerits of ER Fluid but also overcomes its deficiencies during use. What’s more, it hasthe performance of elastomer. Therefore, ER elastomer has a wider application invibration control field.Depending on NSFC（11172100）, according to the electric performance ofelectrorheological elastomer, the paper studied the ER elastomer damper in thevibration control both theoretically and experimentally.At first, three types of electric elastomer were prepared whose dispersed phasewere starch, barium titanate and the mixture of two former, then with the electric-fieldor not, the mechanical performance analysis the ER elastomer were made.Secondly, the extrusion type and shear type electrorheological elastomer shockabsorber were prepared in the paper, meanwhile,the motion simulation of theextrusion type and shear type electrorheological elastomer shock absorber was made,and the model analysis of the shear type electrorheological elastomer shock absorberwas also made.Finally, in the presence and absence of applied electric-field, the vibrationcontrol experiments for absorbers were taken and studied under various of energizingfrequency. The results showed that the damping and the stiffness of ER elastomerabsorber could be controlled by the applied electric field, but there were differencesbetween the shear type shock absorber and the extrusion type shock absorber. Thedamping and stiffness of the shear type shock absorber increased with the enhancementof the applied electric-field. Macroscopicly, it showed that damping coefficient wasbecoming stronger with the increase of the applied electric field and vibrationreduction performance under the high frequency was better than that under lowfrequency. While the damping and stiffness of extrusion type shock absorber was alsocontrolled by applied electric-field. When working at some fixed incentive frequency,there existed an optimal electric field for the extrusion type shock absorber. At thesame time, the damping property of the extrusion type shock absorber in low frequency was better than that in the medium-high frequency. The experiment verifiedthe correctness of finite element modeling and modal analysis of the shear type shockabsorber.