This paper has investigated the frequency domain behavior of two different designs of passive hydraulic engine mounts by use of appropriate linear and nonlinear models. A design relying on fluid pressure changes induced by engine/road excitations to control the amplitude-sensitive component of the mount was compared with a design that controlled the mount behavior by directly using the engine/road excitations. When both mount are designed in a similar manner such that the properties of each mount are constant with respect to one another the isolation characteristics of either mount are similar; however, each respective mount has its advantages and disadvantages as compared to one another. The direct-decoupler mount exhibits the lowest transmissibility in low-frequency domains whereas the floating-decoupler mount behaves better as excitation frequencies increase. In addition to comparing the performance of the two engine mounts several mathematical difficulties were investigated. The instabilities of the direct-decoupler-type mount were investigated using a rather new technique described as the energy-rate method introduced as an effective method to analyze the stability of the parametric system. In addition, the nonlinear frequency response solutions for both mounts are validated by direct comparison to their corresponding linear counterparts and noting the similarity between solutions in regions sufficiently removed from resonance the nonlinear modeling is considered accurate. The appearance of jump phenomenon related instabilities in the frequency response of the floatingdecoupler mount is shown to exist, which is consistent with published literature on the subject of nonlinear modeling of hydraulic mounts. In addition, the existence of a frequency island has been illustrated in the high-frequency region of operation for the floating-decoupler-type hydraulic mount.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Dynamic behavior comparison of passive hydraulic engine mounts. Part 1: Mathematical analysis


    Additional title:

    Vergleich des dynamischen Verhaltens passiver dynamischer Motoraufhängungen. Teil 1: Mathematische Analyse


    Contributors:

    Published in:

    Journal of Sound and Vibration ; 290 , 3-5 ; 1040-1070


    Publication date :

    2006


    Size :

    31 Seiten, 22 Bilder, 2 Tabellen, 12 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English







    Adaptive-Passive and Active Hydraulic Engine Mounts

    Little, E. / Kashani, R. / American Society of Mechanical Engineers et al. | British Library Conference Proceedings | 1995


    Adaptive Hydraulic Engine Mounts

    Graf, Peter L. / Shoureshi, Rahmat / Houston, Terry L. | SAE Technical Papers | 1986