隔振技术在水下航行器推进轴系振动控制中的应用

Application of Vibration Isolation Technology to Vibration Control of Undersea Vehicle Propulsion Shafting

推进轴系通过支撑轴承向壳体传递的振动所引起的辐射噪声是水下航行器尾部主要的噪声源之一。文中针对水下航行器推进轴系的特点,开展隔振技术在推进轴系振动控制中的应用研究,设计了弹性花键联轴器和金属橡胶隔振装置,同时降低发动机输出端振动向尾轴的传递及轴系振动通过支撑轴承向航行器壳体的传递,并开展了2种隔振装置减振效果的陆上台架验证试验。试验结果表明,弹性花键联轴器和金属橡胶隔振装置能有效降低推进轴系引起的壳体振动响应,降幅达9~11 dB。

The radiated noise caused by shell vibration from propulsion shafting via supporting bearings is the main noise source of undersea vehicle tail.According to the characteristics of undersea vehicle's propulsion shafting,the application of vibration isolation technology to vibration control of the propulsion shafting was investigated in this study.An elastic spline coupling and a metal-rubber vibration isolation device were designed,which could simultaneously reduce the vibration transmission from engine output part to tail shaft or from propulsion shafting through supporting bearings to undersea vehicle shell.Test was performed on the land test bed to verify the effect of the vibration isolation technology,and the results showed that the elastic spline coupling and metal-rubber vibration isolation device can effectively reduce the shell?s vibration response to the propulsion shafting with the decrease of 9 to 11dB.