Lumped parametric modeling and model modification for fixed decoupling hydraulic engine mount

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (5) : 32-44.

ZHOU Dawei, ZUO Shuguang, WANG Jun, HU Kun, WU Xudong

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Abstract

Here, in order to improve dynamic characteristics prediction accuracy of a fixed decoupling hydraulic engine mount (HEM), a novel lumped parametric model and a modified lumped parametric model were proposed, respectively both considering effects of decoupling film stiffness on volume flexibility of upper liquid chamber, and the former made decoupling film be equivalent to an explicit spring with two added parameters of decoupling film stiffness and equivalent pump suction area, while the latter modified flexibility of upper liquid chamber with a more concise form according to decoupling film stiffness based on conventional lumped parametric model.Then the finite element method was employed to identify decoupling film stiffness, upper liquid chamber’s equivalent volume flexibility and other lumped parameters.Finally, all identified lumped parameters were substituted in the two models and to perform simulations.The results showed that both two proposed models can correctly predict dynamic stiffness and lagging angle of a fixed decoupling HEM, while the conventional lumped parametric model of HEM can’t do.

Key words

hydraulic engine mount / fixed decoupling film / parametric identification / lumped parametric model

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ZHOU Dawei, ZUO Shuguang, WANG Jun, HU Kun, WU Xudong. Lumped parametric modeling and model modification for fixed decoupling hydraulic engine mount[J]. Journal of Vibration and Shock, 2020, 39(5): 32-44

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