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With the increasing demand for quieter and more efficient electric vehicles (EVs), understanding the vibroacoustic behavior of gearbox housings is essential for optimizing noise and vibration performance. Gearbox housings play a critical role in structure-borne and airborne noise transmission, influencing the overall NVH (Noise, Vibration, and Harshness) characteristics of an electric drivetrain. This work focuses on the simulation-based evaluation of vibroacoustic behaviour using Finite Element Method (FEM) and acoustic analysis in ANSYS, aiming to improve the gearbox housing design for better NVH performance.

Task:

Initially, a CAD model of the gearbox housing will be imported in the FEM software, involves meshing the model for FEM simulation. Then various boundary conditions and excitation forces will be applied at critical points such as bearing locations to replicate real operating conditions. Vibroacoustic response simulations will then be conducted in ANSYS to analyze the natural frequencies, vibration modes, and noise radiation of the gearbox housing.  In addition, the effect of lightweight modifications—such as rib arrangements, thickness variations, and structural cut-outs—on the vibroacoustic behavior will be investigated. These modifications aim to reduce weight while maintaining or improving NVH performance. Finally, the results will be evaluated based on NVH-relevant criteria, and potential design optimizations will be proposed to enhance the noise and vibration performance of the gearbox housing.

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