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Communication Dans Un Congrès Année : 2004

Analytical study of coupling between subsystems of a vehicule NVH model

Frédéric Mortier
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Résumé

The design of an automotive powertrain mounting system plays an important role in improving vehicle noise, vibration and harshness (NVH). One of the main problems encountered in the automotive design remains the isolation of the low frequencies vibrations of the engine from the rest of the vehicle. Several engine mounting schemes have been developed to deal with this problem. Most of these strategies stem from arranging the rigid body modes of the engine mounted on resilient supports to have certain coupled or decoupled characteristics. It is currently admitted in literature that a decoupled powertrain mounting system improves NVH characteristics. The significant engine mass makes the right frequencies and modes arrangement a critical design decision. But it can not be stated that decoupling the on-ground rigid body modes of the engine will systematically reduce chassis vibrations. In this paper, a new analytical method is proposed to examine the mechanisms of coupling between the engine and the vehicle body structure. The analytical procedure enable to define the domain of validity of the mounting schemes based on a 6 degreesof- freedom engine model and to assess NVH improvement.
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Dates et versions

hal-00913351 , version 1 (03-12-2013)

Identifiants

  • HAL Id : hal-00913351 , version 1

Citer

Eric Courteille, Lionel Leotoing, Frédéric Mortier, Eric Ragneau. Analytical study of coupling between subsystems of a vehicule NVH model. International Conference on Noise and Vibration Engineering 2004, Sep 2004, LEUVEN, Belgium. pp.3375-3386. ⟨hal-00913351⟩
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