There are various vibration sources on the ship, including propulsionsystem, main engine and other auxiliary equipment. As one of themajor vibration sources of ship, the propeller has a great influence onthe vibration of stern. The fluctuating pressure is the most importantinducing factors. In this paper, the propeller fluctuating pressure of apassenger ship and the technology of vibration reduction by air curtainare predicted based on CFD method to analyze the distribution ofpropeller fluctuating pressure at the stern bottom surface. The controlof fluctuating pressure is realized by setting an air nozzle on the shipbottom plate in front of the propeller to produce an air curtain on thesurface of ship to reduce the influence of fluctuating pressure workingon the ship bottom. The influence on fluctuating pressure of differentjet flow is studied by simulation. The result shows that the peak valueof the fluctuating pressure decrease gradually with the jet flowincreased, but the decreasing trend is slowing down.
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