摘要
采用振动功率流法对基座至船体结构的振动传递特性进行了分析，通过模型试验研究基座结构的阻尼减振性能。结果表明：（1）基座结构粘贴复合阻尼减振胶板后，在0.5~5kHz频率范围内结构损耗因子大幅增加，以致加速度振级落差降低，减振效果明显；（2）分别对基座的腹板、腹板和肋板，以及基座整体结构粘贴复合阻尼减振胶板后，船体结构的平均振动加速度级衰减值最大可达7.7dB、11.3dB和12.0dB；将振动源安装在基座结构具有腹板支撑的正上方面板位置，与安装在腹板之间的面板位置相比，船体结构的振动加速度级可减少1～5dB。研究结果对船体基座的结构阻尼减振设计具有指导意义。
Vibration transmission from the base structure to the ship hull was analyzed baesd on vibration power flow rate, and vibration experiment of the base with visco-elastic composite material was carried out. It is shown that for the base on which composite rubber sheet is pasted, structure damping is greatly enhanced and power flow transmission is significantly decreased in the frequency range of 0.5 to 5 kHz. Average vibration acceleration of the hull structure is mostly reduced by 7.7dB, 11.3dB and 12.0dB, when composite rubber sheet is pasted on webs, on both webs and rib, and on the whole base respectively. Vibration acceleration transfer from base to ship is lower about 1 to 5 dB, when the driving point is located on the position of the panel just above one web rather than on the position between both webs. The research has guiding significance for vibration attenuation design of hull base structure.
出处
《中国造船》
EI
CSCD
北大核心
2014年第2期85-91,共7页
Shipbuilding of China
基金
国家自然科学基金项目(11302088)
江苏省自然科学基金青年基金(BK2012278)
关键词
基座
复合阻尼
功率流
阻尼减振
加速度
hull base
composite rubber sheet
power flow
vibration damping
vibration acceleration
