TY - JOUR AU - Guenfoud, Nassardin Nassar AU - Robin, Olivier AU - Panneton, Raymond AU - Desrochers, Alain AU - Belgacem, Walid PY - 2016/08/24 Y2 - 2024/03/28 TI - Comparison of two methods of transfer path analysis applied to snowmobile for noise source identification JF - Canadian Acoustics JA - Canadian Acoustics VL - 44 IS - 3 SE - Proceedings of the Acoustics Week in Canada DO - UR - https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2901 SP - AB - The purpose of this paper is to propose a vibro-acoustic modeling of a snowmobile suspension in order to determine the elements and transfer paths that contribute most to the global noise of this mechanical system. Two approaches, Transfer Path Analysis (TPA) and Operational Transfer Path Analysis (OTPA) are compared. The first one consists in using measurements of mechanical impedance, the operational data, and the airborne transfer functions obtained according to the reciprocity principle. In the second approach, the airborne transfer functions are no longer measured, but are now calculated using an inverse method and operational data only. Consequently, two different matrix models for these airborne transfer functions are obtained. In both cases, the mechanical excitation forces are determined by inverse method using singular value decomposition. Finally, an experiment is set up to conclude on which approach provides the best reconstruction and identification of contributors to the radiated noise. The applicability and rapidity of each model are also discussed in the conclusion. ER -