摘要
针对围壳孔腔流噪声的控制问题,首先研究围壳孔腔流噪声的产生机理,结果表明围壳腔体声模态是影响孔腔流噪声辐射的主要因素,流噪声作为声源扰动,激发围壳腔体内部各阶声模态,从而使得辐射噪声出现多阶峰值。通过在围壳内部添加隔板可改变围壳腔体模态,抑制腔体对噪声的放大作用,显著降低1阶线谱幅值,对比分析了不同形式隔板对辐射噪声的抑制效果,对在工程实际中改善围壳孔腔流噪声具有一定的指导意义。
In view of the problem that the shaft vibration affects the underwater vehicle stealth, the vibration isolation system of reasoning bearing is designed based on the transfer matrix method. The results show that the method is simple and easy to implement, the vibration of shafting caused by longitudinal excitation can be effectively reduced under the condition that the stability of the shaft system, which provides a new way of the shafting vibration control.
作者
杨庆超
杜奎
李荣华
YANG Qingchao;DU Kui;LI Ronghua(College of Naval Architecture and Power, Naval Univ. of Engineering, Wuhan 430033, China;Power Engineering College, Naval University of Engineering, Wuhan 430033, China)
出处
《噪声与振动控制》
CSCD
2018年第A02期392-396,共5页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51579242
51509253)
关键词
围壳孔腔
流噪声
声模态
控制
vibration and wave
cavity
flow noise
acoustic modal
control
