Abstract
A mount, which combines air-spring with viscous fluid is designed. In this mount, air-spring generates the dynamic stiffness, and shearing of viscous fluid generates the loss stiffness. The conceptual purposes are to adjust a neutral position easily by changing the pressure of the air-spring and to prevent a rapid drop of the damping performance from the stationary characteristics in case of excess load. The purpose of this research is to evaluate damping properties of the composite mount. First, the dynamic characteristics of the composite mount are obtained by excitation tests of the mount itself. But the characteristics might not be identified by the standard mechanical model accuracy because they depend on not only excitation frequency but also amplitude. So the nonlinear dynamic characteristics are identified using five-element Maxwell model with a variable parameter. Finally, the composite mount is compared with the viscous mount by the simulation using the identified model, and the damping performance quantitatively indicated.
