Title: Modelling of dynamic performances for Hydraulic Engine Mounts using fractional derivative and optimisation of Powertrain Mounting Systems

Authors: Wen-Bin Shangguan, Jie Wu

Addresses: School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, China. ' School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, China

Abstract: A Hydraulic Engine Mount (HEM) is an advanced passive vibration isolator, and is now widely used in automotive Powertrain Mounting System (PMS). A version of fractional derivative model characterised by five parameters is presented to describe the dynamic properties of an HEM. A model for a PMS is established, and formulae for estimating the dynamic displacement of the powertrain Centre of Gravity (CG) and the reaction forces of a mount under different loads are presented. An optimisation procedure is developed for reducing resonance peaks of a powertrain CG and the reaction forces at mounts. A generic PMS with two rubber mounts and two HEMs is used to validate the optimisation method.

Keywords: dynamic modelling; dynamic performance; hydraulic engine mounts; fractional derivative models; optimisation; resonance peaks reduction; powertrain mounting; passive vibration isolator; rubber mounts; vehicle design.

DOI: 10.1504/IJVD.2008.020888

International Journal of Vehicle Design, 2008 Vol.47 No.1/2/3/4, pp.215 - 233

Available online: 22 Oct 2008 *

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