Contribution
Influence of Rib Dimensions on the NVH Performance of Lightweight Gearbox Housings in an Electric Vehicle
* Presenting author
Abstract:
Recent progress in electric vehicle (EV) applications has increasingly focused on lightweight structural designs to improve energy efficiency and minimize noise and vibration. One effective strategy to balance weight reduction and interior noise control is the use of ribs on the surface of the gearbox housing. The present paper investigates the influence of rib dimensions on the noise and vibration behavior of a lightweight electric vehicle gearbox housing. Several rib configurations are applied to an initial gearbox housing model, and their impact on the vibration characteristics based on modal analysis and harmonic response is systematically analyzed by numerical simulation in finite element software. The results show that specific ribs with certain dimensions can effectively reduce vibration amplitudes and noise levels. The study reveals that ribs play a significant role in enhancing local stiffness and reducing weight; however, optimizing rib design parameters such as thickness, height, and length is essential to achieve effective noise and vibration control in a target frequency range. These insights offer guidance for optimizing rib configurations before manufacturing, thereby improving the performance of lightweight gearboxes in electric vehicles to meet the growing demands for efficiency and passenger comfort.