In this research to prevent vibration transmission to the dome structure, vibration isolation materials are attached on the baffle. Vibration transmission characteristics were analyzed by using finite element method. The selected attaching materials are NBR(Acrylonitrile Butadiene Rubber), SBR(Styrene Butadiene Rubber), SR(Silicone Rubber), CR(Chloroprene Rubber), UR(Urethane Rubber), and EPDM(Ethylene propylene diene ter monomer) which have different Young's modulus and density but same Possion's ratio.
Based on the finite element method, results at the frequency of near 400Hz vibration isolation performance shows SBR>NBR>EPDM>SR>CR>UR when the thickness is 2mm. However the thickness is 3mm the performance shows SBR>CR>UR>SR>NBR>EPDM. Maximum isolation performance appeares when the SBR thickness is 2mm, 3mm, 4mm, and 1mm in the case of UR. At the frequency of near 500Hz, vibration isolation performance shows SBR>UR>EPDM>CR>NBR>SR when the thickness is 2mm. However when the thickness is 1mm, the performance shows UR>CR>SBR>NBR>SR>EPDM. The maximum isolation performance appears when the SBR thickness is 2mm, 3mm, 1mm in the case of UR and 4mm in the case of NBR. Vibration isolation performance depend on the materials properties such as thickness, density and natural frequency of the baffle on the dome structure.