Impact response analysis for panel with damping layer having flexible frame supported by nonlinear springs

Abstract

This paper describes vibration analysis using finite element method for a flexible elastic frame with a damped panel connected by nonlinear concentrated springs under impact load. For weight saving, the frame is more flexible and mass less than the comparison frame. Finite element for the nonlinear springs are expressed and are attached to the elastic frame with the panel modeled by linear solid finite elements. A viscoelastic damping material is laminated on the steel panel. The damping layer is also modeled by solid elements in consideration of complex modulus of elasticity. The restoring force of the springs have cubic nonlinearity and linear hysteresis damping. We numerically calculated the nonlinear impact response among nonlinear springs, panels and frame structures. Using the results, we considered the influences of the weight reduction on the nonlinear vibration phenomenon.