Study on the Transferring Characteristics of Power Flow Through Raft by Complex Excitations
Li Xinde, Song Kongjie, Sun Yuguo
(Mechanical Vibration and Noise Control Lab, Shandong University, Jinan 250061, China)

Abstract: Ship vibration and noise control by the isolation theory are studied in this paper. The dynamic 6-dimensional model on the flexible floating raft equipment with multi-machines is established to analyze and calculate the power flow. The power flow transmission expression of the floating raft equipment is derived to evaluate the isolation effect of the floating raft equipment from the point of view of vibration energy transmission and the curve of power flow spectra is plotted. The influence of the machines, the raft and the foundation's parameters on the power flow transmitted into the flexible foundation are investigated. A general rule is given to choose the structural parameters.
Keywords: floating raft, power flow, vibratory control.