船舶结构气幕减振的模型试验研究

对船舶结构气幕减振的模型试验研究作了介绍和讨论。试验模型为铝质，平底，尖首，方尾，开口薄壁型船模，试验在循环水槽中进行，通过2种吃水，2种喷气孔径，5种喷气流量，2种水流速度的选择组合，研究了气幕对船模自由振动，强迫振动和振动阻尼的影响，试验结果表明，气幕对船舶结构的强迫振动响应有较大的抑制作用，有明显的降噪效果，气幕减振有重要的应用前景。

Experimental Investigation on Vibration Reduction of Hull Model by Air Injection

The effect of air injection on vibrati on reduction of hull model is investigat ed experimentally. The model is fabricat ed by aluminum plates, with sharp bow, s quare stern, flat bottom and open deck. The tests were carried out in a circulat i ng flow water tank. The influences of ai r injection on free vibration, on respon se of forced vibration and on damping of the hull model are investigated under s everal selected combinations of 2 draft, 2 pore size, 5 air flow rates, 2 flow f luid velocities. The test results show t hat the response of forced vibration of ship structure is effectively reduced, t he maximum reduction is about 50%, by in troducing air injection. The structure n oise is also reduced at the same time. T he investigation reveals broad prospects of air injection technique in the reduc tion of ship structure vibration.