Optimization of classical hydraulic engine mounts based on RMS method

Article type: Research Article

Authors: Christopherson, J. | Jazar, G. Nakhaie

Affiliations: Department of Mechanical Engineering and Applied Mechanics, North Dakota State University, Fargo, ND 58105, USA

Note: [] Corresponding author: G. Nakhaie Jazar, Department of Mechanical Engineering and Applied Mechanics, North Dakota State University, Fargo, ND 58105-5285, USA. Tel.: +1 701 231 8303; Fax: +1 701 231 8913; E-mail: [email protected]

Abstract: Based on RMS averaging of the frequency response functions of the absolute acceleration and relative displacement transmissibility, optimal parameters describing the hydraulic engine mount are determined to explain the internal mount geometry. More specifically, it is shown that a line of minima exists to define a relationship between the absolute acceleration and relative displacement transmissibility of a sprung mass using a hydraulic mount as a means of suspension. This line of minima is used to determine several optimal systems developed on the basis of different clearance requirements, hence different relative displacement requirements, and compare them by means of their respective acceleration and displacement transmissibility functions. In addition, the transient response of the mount to a step input is also investigated to show the effects of the optimization upon the time domain response of the hydraulic mount.

Journal: Shock and Vibration, vol. 12, no. 2, pp. 119-147, 2005