THE OPTIMIZATION OF ENGINE MOUNTING SYSTEM BASED ON AN EQUIVALENT MODEL

An equivalent analysis model for an engine mounting system is built with the ANSYS software. The engine powertrain is idealized to an equivalent composite body composed of one inertial body and one elastic body. Every mounting component is simplified as one spring along its three principal elastic axes and the powertrain mass, and rotational inertia and exciting-force loading locatiosn are accurately embodied. The modal analysis, optimization of energy decoupling degree and resonant frequency of an equivalent model were carried out in ANSYS. Results show that the equivalent modeling method is valid and feasible. For an engine mounting system, this model provides a new simplified modeling method for the modal analysis and optimization of dynamic response and vibration isolation rate in ANSYS.