Prediction Of Ship Equipment Vibration Transmission And Study On Vibration Isolation Effect Of Floating Raft

With the improvement of people’s living standard, more and more attention has been paid to the comfort of the ship, among them, the level of vibration noise is an important measure of comfort. For military ships, the vibra tion noise is an important problem to restrict the performance of the acoustic stealth. Equipment is one of the main vibration noise sources on the ship, therefore, this paper is named prediction of ship equipment vibration transmission and study on vibrat ion isolation effect of floating raft, this article is expected to be able to study a reasonable method of vibration transfer prediction and effective floating raft vibration isolation system, and could provide reference and help for engineering design and application.In the paper, ABAQUS software is used to simulate the vibration transmission of the equipment. At first, the reliability of the simulation method is verified by comparing the theoretical value of single degree of freedom single layer isolatio n system with the simulation results of the ABAQUS software. Then, the floating raft isolation system is designed and modeled, and the function points of the equipment in the floating raft isolation system are analyzed, and the relevant test points were selected. At last, the isolator and elastic foundation of the floating raft isolation system were simulated and analyzed under different parameters and different working conditions by using ABAQUS finite element analysis software, and a meaningful conclusion is come.In this paper, by the simulation and analysis of different stiffness and damping coefficient of the floating raft isolation system, we can come to conclusions like these: the vibration isolation effect of the system has been improved obviously wi th the decrease of the stiffness of the isolators; the vibration isolation effect of the system improved to a certain extent with the increase of the damping coefficient of the isolators. Basing on the simulation analysis of the elastic foundation of the system in different stiffness and different mass, it is fingered that the vibration isolation effect of the system will be improved with the increase of the stiffness of the elastic foundation and with the decrease of the elastic foundation quality.