Transmission Noise Analysis of Gearbox Using Aluminum and Magnesium Cast Alloys Based on Structure-Acoustic Coupling Method

Lian Sheng Wang; Zhi Yong Hao

doi:10.4028/www.scientific.net/AMM.540.151

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 540Transmission Noise Analysis of Gearbox Using...

Transmission Noise Analysis of Gearbox Using Aluminum and Magnesium Cast Alloys Based on Structure-Acoustic Coupling Method

Abstract:

In order to study the characteristics of manual gearbox transmission noise, the sound insulation performance of gearbox was analyzed with the structure-acoustic coupling method. The constraint modal and sound transmission loss between aluminum alloy (ADC12) and magnesium alloy (AZ91D) material gearbox was compared. At last, analysis results show that magnesium alloy gearbox overall weight fell about 33%, but its sound insulation performance got worse, so it is necessary to improve on the structure design and make its natural frequency to avoid noise peak frequencies. This method provides new ideas for gearbox lightweight design and noise optimization.