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Study of Nonlinear Hydraulic Engine Mounts Focusing on Decoupler Modeling and Design
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Abstract
Decoupler nonlinearities of the automotive hydraulic engine mount affect its isolation performance and the transmission of structure-borne noise. The kinematic gap nonlinearity of the decoupler is examined in considerable detail in the context of the quarter car model. It is shown that while modeling it with a “softened” nonlinear expression may only moderately affect predicted system behavior at the excitation frequency, it can significantly after it at higher harmonics, changing the predicted level of structure-borne noise transmission. Studies of multi-harmonic motion and vibratory power transmission under sinusoidal and composite excitation conditions confirm that, in fact, use of a decoupler with a “softened” nonlinearity improves performance.
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Citation
Royston, T. and Singh, R., "Study of Nonlinear Hydraulic Engine Mounts Focusing on Decoupler Modeling and Design," SAE Technical Paper 971936, 1997, https://doi.org/10.4271/971936.Also In
References
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