轴承间距对水下结构振动与声辐射影响研究  

Underwater Structure Vibra-acoustic Radiation Impact Study of Shaft Bearings Spacing

作　　者：宁荣辉[1] 翁雪涛[1] 朱石坚[1] 李海峰[1] 

机构地区：[1]海军工程大学动力工程学院,武汉430033

出　　处：《武汉理工大学学报（交通科学与工程版）》2015年第4期815-818,822,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目资助(批准号:51179179)

摘　　要：轴系振动是水下结构振动声辐射的主要因素之一.为研究轴系轴承间距对水下结构振动声辐射的影响,建立了轴系的有限元模型,以及水下结构的流固耦合模型.利用有限元/边界元的方法,分析计算了水下结构的辐射声功率级、均方法向速度级和100m场点处辐射声压级,以及结构声辐射效率.结果表明:轴承间距在一定范围内变化,水下结构的辐射声功率级、均方法向速度级和100m处辐射声压级的峰值频率也随之变化.Shafting vibration is one of the main causes of underwater structure vibra-acoustic radiation. In order to study the effect of shafting bearing spacing on the vibration acoustic radiation of underwa- ter structure, a finite element model of shaft system is established, as well as a fluid-structure interac- tion model of underwater structure. And then the radiated sound power level, the mean-square veloci- ty level, the radiated sound pressure level at 100-meter field point and the acoustic radiation efficiency of the underwater structure are calculated through the method of FEM/BEM. The results show that as the bearing spacing changed within a certain range, the peak frequency of the radiated sound power level, the mean-square velocity level, the radiated sound pressure level at 100 meter field point and the acoustic radiation efficiency of the underwater structure also changed linearly.

关 键 词：间距 有限元/边界元 声辐射 声功率 辐射效率 

分 类 号：U661.44[交通运输工程—船舶及航道工程]