一、引言我国江河众多,随着国民经济的发展,内河航运将有较大的发展。但许多内河船舶机舱小、设备陈旧、振动噪声污染严重,以致有些船舶在航行过程中,许多物件都会跳动;在驾驶室与船艉因噪声太大无法直接对话联系。交通部《运输船舶舱室噪声标准》的颁布,把控制船舶噪声污染的课题提到日程上来了。船舶的主要噪声源是主机、辅机、减速齿轮箱、螺旋桨等机器设备运转时产生的振动,经甲板桁梁等钢铁结构进行传播,向外辐射噪声,与此同时,机器设备在运转时产生的噪声经 I. Introduction Many rivers in our country, along with the development of national economy, inland shipping will have greater development. However, many inland vessels are small in size with obsolete equipment and serious pollution of noise and vibration. As a result, many vessels may be beating during the voyage. In the cab and the ship, noise and direct communication can not be reached. The promulgation of the “Noise Standard for Transport Ships Cabin” issued by the Ministry of Communications has put the issue of controlling ship noise pollution on the agenda. The main noise source of the ship is the vibration generated during the operation of machinery and equipment such as the main engine, auxiliary machinery, reduction gear box and propeller. It is propagated through steel structures such as deck girders and radiates noise to the outside. At the same time, machinery and equipment are produced during operation The noise of the