Noise, Vibration and Harshness (NVH) Study on Malaysian Armed Forces (MAF) Tactical Vehicle

Author:

Ab Aziz Shamsul Akmar1,Sohaimi Risby Mohd2,Pu’ad Muhammad Hazwan2,Mohd Yaman Mohd Abdullah2

Affiliation:

1. STRIDE

2. Universiti Pertahanan Nasional Malaysia

Abstract

Noise, Vibration and Harshness (NVH) is the study and modification of the noise and vibration characteristics of vehicles, particularly cars and trucks. NVH parameters which consist of noise (unwanted sound), vibration (mechanical oscillation) and harshness (severity or discomfort of noise or vibration) need to be evaluated in order to improve comfort and safety levels for vehicle occupants. In this paper, NVH study was conducted on Malaysian Armed Forces (MAF) tactical vehicles in order to ensure that the vehicles meet the requirements of the Occupational Safety and Health Administration (OSHA) and Directive 2002/44/EC. The project aim was to identify the preferable solution that can improve the NVH parameters of the vehicles in accordance to the standard and test protocols. A 4x4 Troop Transporter vehicle which carried 8 persons at the rear cabin was used in the NVH testing. The vibration parameters studied are hand arm vibration (HAV), focussing on vibration on the steering wheels of the vehicle, and whole body vibration (WBV), focussing on vibration on the seats. For noise, it was measured at the driver cabin and rear cabin of the vehicles. From the results, the HAV value for driver during idle speed was found to be higher than the others velocity. For WBV, vibration value for passenger 1 in rear cabin was highest compared to the other WBV test points.

Publisher

Trans Tech Publications, Ltd.

Reference11 articles.

1. Directive 2002/44/EC (2002). Minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (vibration), Brussels.

2. M. S. Qatu and M. H. Sirafi (2002), Robustness of Powertrain Mount System for Noise, Vibration and Harshness at Idle, Journal of Automobile Engineering, 216, 805-810.

3. Stayner R M (2001), Whole-body vibration and shock: A literature review: Extension of a study of over travel seat suspensions. ISBN 0-7176-2004-2.

4. OSHA (1981). Noise and Hearing Conservation, Washington, USDL.

5. Factories and Machinery Regulation (1989). Part II- Permissible Exposure(Noise Exposure), Malaysia, DOE.

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