DEVELOPMENT OF A NUMERICAL TOOL AND APPLICATION OF A NOVEL NATURAL FIBRE MATERIAL FOR THE REDUCTION OF VEHICLE CABIN NOISE | ||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||
| Article 1, Volume 18, 18th International Conference on Applied Mechanics and Mechanical Engineering., April 2018, Pages 1-18 PDF (1.2 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/amme.2018.34714 | ||
| Authors | ||
| D. A. Desai1; R. K. Dunne2; R. Sadiku3 | ||
| 1Doctor, Dept. of Mechanical Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, South Africa. | ||
| 2Graduate student, Dept. of Mechanical Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, South Africa. | ||
| 3Professor, Dept. of Chemical, Metallurgical and Material Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, South Africa. | ||
| Abstract | ||
| ABSTRACT The level and quality of noise experienced by occupants in transportation systems such as military vehicles are issues of increasing concern and are among the major challenges of the automotive industry apart from reducing vehicle mass and product recyclability. Researches have shown that the vibration behaviour of panels that enclose the passenger cabin can affect low-frequency interior noise resulting in adverse effects on the human body or vehicle occupants. However, a compelling amount of anecdotal evidence reported that the characterisation of structure-borne panel vibration and its subsequent noise emission characteristics employing recyclable, sound absorbing, natural fibre composites with an Acrylonitrile Butadiene Styrene (ABS) matrix has not yet been studied within a vibro-acoustic setting. Thus, the primary contribution of this original work was to implement a novel poroelastic natural fibre damping material into a flexible numerical model to predict and improve the vibro-acoustic performance of a vehicle’s cabin when provoked by an external structural forcing function. With reference to an undamped vehicle, a discrete, frequency domain numerical model is developed and experimentally validated based on frequency response data. It was observed that the proposed numerical model effectively and efficiently simulates the noise levels within the vehicle model while the newly developed natural fibre material does reduce cabin noise to a perceivable degree. | ||
| Keywords | ||
| Vibration; Automotive interior noise; Finite Element Analysis; Fluid-structure interaction; NVH | ||
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