Measurement of Noise inside the Compartment and Vibration on both Sides of Elastomeric Powertrain Mounts of Passenger Car

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Measurement of Noise inside the Compartment and Vibration on both Sides of Elastomeric Powertrain Mounts of Passenger Car

Rejab, Mohd Noor Arib / Rahman, Roslan Abd / Hamzah, Raja Ishak Raja / Hussain, Jawaid Iqbal Inayat / Ahmad, Nazirah / Ismail, Asyraf

Abstract

This paper presents an evaluation on elastomeric mount used to isolate vibration from powertrain to chassis or structure vehicle. The assessments started with measurement of noise inside compartment, and exhaust noise. This is followed by the measurement of vibration on both sides of elastomeric mounts. The noise in the compartment and exhaust noise is measured according to BS 6086: 1981 and BS ISO 5130: 2007. The noise in the compartment and vibration is tested in three conditions. Firstly, engine is run-up with load (driving at second gear); secondly, without load; and thirdly, without load but hanging. A microphone is fixed at the ear of the mannequin. The fast response and A weighting sound level meter were used for measurement noise in the compartment and exhaust noise. The vibration is measured in terms of acceleration on both sides of each elastomeric powertrain mounts. Two accelerometer transducers are fixed on both sides of powertrain elastomeric mounts. One side was identified as a source of vibration and the other as receiver of vibrations. The results showed that the pattern of overall vibration level on source and receiver increased from 1050 RPM (idling) to 4000 RPM on all test conditions. Vibration transmitted to chassis or receiver structure was analyzed using transmissibility concept. By evaluating test condition of engine run-up without load, informed that the front and rear mounts showed a high level transmissibility contributing to structure-borne noise.

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Document information

Title :

Measurement of Noise inside the Compartment and Vibration on both Sides of Elastomeric Powertrain Mounts of Passenger Car

Contributors:

Rejab, Mohd Noor Arib (author) / Rahman, Roslan Abd (author) / Hamzah, Raja Ishak Raja (author) / Hussain, Jawaid Iqbal Inayat (author) / Ahmad, Nazirah (author) / Ismail, Asyraf (author)

Published in:

NVC, International Conference on Noise, Vibration and Comfort, 4 ; 59-63

Applied Mechanics and Materials ; 471

Publication date :

2013

Size :

5 Seiten

ISSN :

1660-9336

DOI :

https://doi.org/10.4028/www.scientific.net/AMM.471.59

Type of media :