摘要
对非线性隔振系统而言,当其参数处于特定区域时,系统可能处于混沌状态,从而在线谱激励下可以产生具有宽谱特征的混沌响应,以达到消减潜艇辐射噪声线谱成分的目的。设计了分段隔振系统并开展试验研究,利用改进小波去噪算法和空间栅格特征提取方法对实测信号进行滤波和识别处理。试验中观察到了系统复杂的动力学行为,为混沌的工程应用提供了有益参考。
The nonlinear vibration isolation system is probably in a chaotic state when its parameters are within acertain range. Then, chaotic responses with wide spectral characteristic may appear under linear spectrum excitation so thatthe linear spectrum components of radiation noise of submarines can be eliminated. In this article, the piecewise vibrationisolation system is designed and experimental research is carried out. Then, the measured signals are filtered and identifiedbased on the improved wavelet transform and space grid method. Complex dynamic behavior of the system is observed inthe experiment. This work has provided useful guide for engineering application of chaotic systems.
出处
《噪声与振动控制》
CSCD
2014年第2期5-7,49,共4页
Noise and Vibration Control
基金
国家自然科学基金(基金编号:51179197)
海洋工程国家重点实验室(上海交通大学)开放课题(1009)
关键词
振动与波
非线性
混沌振动
空间栅格法
试验研究
vibration and wave
nonlinear
chaotic vibration
space grid method
experimental research
