Research on the Influence of Vibration Isolation Structure on Marine Gearbox Vibration and Noise Reduction

The marine gearbox generates huge vibration and noise due to excitation, which seriously affects performance evaluation and stealth during the working process. To solve the problem, this article adds a vibration isolation system to the gearbox, explores the vibration and noise reduction performance of the 6 spring vibration isolation structures on the gearbox. Furthermore, not only the Block Lanczos method in the ABAQUS software is used to perform modal analysis and dynamic analysis on the gearbox, but also LMS Virtual. Lab acoustic simulation calculation software is used to analyze the noise of the gearbox. The results show that after adding a shock spring vibration damper to the bottom of the gearbox, the noise is reduced by 15%, which can effectively reduce the vibration and noise of the gearbox during operation.