拘束フレームと粘弾性層を持つ制振デバイスと二層型減衰層によるビードパネルのハイブリッド制振解析

抄録

We proposed a new vibration control device consisting of a constraining frame and a viscoelastic layer to realize high vibration control performance. The proposed new vibration control device consists of a viscoelastic gel partially sandwiched between a highly rigid constraining layer with a box cross section and a frame member. We evaluated this vibration system and obtained very high damping effects in the lower eigenmodes for high rigid bead panels. However, for higher eigenmodes, we could not get sufficient damping effects because local modes occur in the flat regions without the damping device outside of the two beads. To improve this situation in this study, we add double-layer-type damping sheets on the flat regions as hybrid damping structure. This structure is modeled and analyzed numerically by FEM, and the changes in vibration reduction characteristics are obtained using the MSE method．