Effective reduction of peak frequency in hydraulic engine mounts

Reza Tikani, Nader Vahdati, Saeed Ziaei-Rad

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Hydraulic engine mounts are generally applied to the aerospace and the automotive applications for the purpose of cabin noise and vibration reduction. By careful selection of hydraulic mount design parameters, at a certain frequency, namely the notch frequency, the dynamic stiffness will be smaller than the static stiffness and cabin vibration and noise reduction is provided at that frequency. Literature review indicates that in all previous hydraulic engine mount designs, the dynamic stiffness increases after the notch frequency. This phenomenon is not desirable because of the increase in transmitted force to the air-frame. Here in this paper, a new hydraulic engine mount design is proposed that uses two working fluids. This new design has two notch frequencies and two peak frequencies. In this study, effective reduction of the peak frequencies has been demonstrated by using a controllable fluid as one of the mount's working fluids and a non-controllable fluid as the 2nd working fluid. As a result, one can obtain a hydraulic engine mount design with only one notch frequency but no peak frequency. The new hydraulic engine mount design and its mathematical model are presented in details and some discussions on the simulation results are also included.

Original languageBritish English
Title of host publicationASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
Pages479-485
Number of pages7
DOIs
StatePublished - 2010
EventASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010 - Philadelphia, PA, United States
Duration: 28 Sep 20101 Oct 2010

Publication series

NameASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
Volume1

Conference

ConferenceASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2010
Country/TerritoryUnited States
CityPhiladelphia, PA
Period28/09/101/10/10

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