Development and analysis of a simplified nonlinear model of a hydraulic engine mount

This paper concerns nonlinear modeling of a hydraulic engine mount, focusin g on the decoupler action. The proposed model is a simple nonlinear functio n, which describes the flow resistance in terms of the decoupler plate disp lacement and speed. The flow resistance using this model increases dramatic ally as the decoupler plate approaches the top or bottom of the decoupler c age. The advantage of the proposed model over the existing ones is its simp licity Numerical simulation results show the behavior of the model to be re alistic. Approximate closed form solutions have been obtained for the syste m using the multiple scale perturbation method. Perturbation provides a sol ution for the mount response at resonance. These results match the intuitiv e and experimental results available in the literature.