ABSTRACT
Mechanical noise caused by power equipment vibration is the main source of underwater-radiated noise of the ship, and vibration isolation and noise reduction of ship equipment have been matters of great concern. Applying the truss structure to the floating raft in the ship is widely used in the fields of aerospace and architectural structure. Four different truss-type raft frame structures are designed in the paper. The vibration transmissibility is taken as an evaluation index to measure the vibration isolation effect. A design scheme with the best vibration isolation effect is found by using a numerical method. Plate-type and the optimized truss-type raft frame structures are processed to experimentally verify the vibration isolation effect of the structure of the floating raft. The results show that the same quality of the truss floating raft has a better isolation effect than that of the plate-type floating raft.
