Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2005. / Vehicle Noise, Vibration and Harshness (NVH) is now a more important
component of the vehicle design process than ever. Road noise is one of the
key criteria used by potential buyers (albeit subconsciously) to choose what
they perceive as the best vehicle.
Road rumble is a key concern for vehicle manufacturers. Light Utility
Vehicles (LUVs) are especially sensitive to a low frequency booming noise
due to the fundamental acoustic mode that exists in the vehicle cabin. An
investigation into this booming noise in an LUV is documented. The noise
is identified and quantified after which the source of the noise in the vehicle
cabin is identified using NVH techniques such as Acoustic Modal Analysis
(AMA), Experimental Modal Analysis (EMA) and Transfer Path Analysis
(TPA). The cabin’s fundamental acoustic mode lay at 100 Hz. Finally the
source of the vibrations in the vehicle leading to the booming noise in the
cabin is identified, along with its transfer path to the cabin.
Solutions for the specific vehicle’s booming noise are proposed, two of
which are tested with some success. Solutions to the problems associated
with the fundamental acoustic mode of LUVs are also proposed and discussed.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/2636 |
| Date | 03 1900 |
| Creators | Wade, Andrew David |
| Contributors | Van Niekerk, J. L., University of Stellenbosch. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | University of Stellenbosch |
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