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一、 引言 长江6004轮,是近年来先后从美国引进的四艘大功率姐妹推轮之一。同目前长江货运中的其他类型推轮相比较,具有货运量大,航速高、操纵性能好等优点。但因该轮主机功率大(两台主机的额定功率各为3070马力)、转速高(额定转速900转/分)且带涡轮扫气泵式高增压器、船舶主尺度小(全长46.05米),故船员工作与生活区受到强烈噪声干扰,机仓噪声尤为严重。
I. Introduction The Yangtze River 6004 is one of the four high-powered sisters that has been introduced from the United States in recent years. Compared with the other types of push wheels in the current Yangtze River freight transportation, it has the advantages of large freight volume, high speed and good handling performance. However, due to the large main engine power (both engines have a power rating of 3070 hp each), high speed (rated speed of 900 r / min) and turbo-scavenge pump supercharger, the vessel has a small main dimension of 46.05 m ), So crew work and living area by the strong noise interference, especially the warehouse noise.