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Vibro - acoustics simulations

Noise radiation from air-conditionning system gaz transmission hoses:

The extremities of the gaz transfer hose system are connected to the car body and to the engine. Relative motion between the engine and the car body results in the vibration of the hoses and in some cases can produce noise radiation, reduction of which is one of the major concerns in modern car design. Moreover, fatique of the system components (metal tubing, reinforced rubber hoses, etc.) have to be also studied.

In this study, first a non-linear analysis is performed to simulate the assembly of the system in the car; then, harmonic responce analysis is used to calculate the vibration velocities in the frequency range of interest; and finally acoustic radiation is done to calculate the sound pressure level.

This study is typical, and similar automotive components and systems (engine valve cover, brakes, panels, etc.) have been also simulated.

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sound pressure level

 

   Last modification : 11-01-03