噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2014年
2期
5-7,49
,共4页
刘树勇%位秀雷%许师凯%杨庆超
劉樹勇%位秀雷%許師凱%楊慶超
류수용%위수뢰%허사개%양경초
振动与波%非线性%混沌振动%空间栅格法%试验研究
振動與波%非線性%混沌振動%空間柵格法%試驗研究
진동여파%비선성%혼돈진동%공간책격법%시험연구
vibration and wave%nonlinear%chaotic vibration%space grid method%experimental research
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。
對非線性隔振繫統而言，噹其參數處于特定區域時，繫統可能處于混沌狀態，從而在線譜激勵下可以產生具有寬譜特徵的混沌響應，以達到消減潛艇輻射譟聲線譜成分的目的。設計瞭分段隔振繫統併開展試驗研究，利用改進小波去譟算法和空間柵格特徵提取方法對實測信號進行濾波和識彆處理。試驗中觀察到瞭繫統複雜的動力學行為，為混沌的工程應用提供瞭有益參攷。
대비선성격진계통이언，당기삼수처우특정구역시，계통가능처우혼돈상태，종이재선보격려하가이산생구유관보특정적혼돈향응，이체도소감잠정복사조성선보성분적목적。설계료분단격진계통병개전시험연구，이용개진소파거조산법화공간책격특정제취방법대실측신호진행려파화식별처리。시험중관찰도료계통복잡적동역학행위，위혼돈적공정응용제공료유익삼고。
The nonlinear vibration isolation system is probably in a chaotic state when its parameters are within a certain range. Then, chaotic responses with wide spectral characteristic may appear under linear spectrum excitation so that the linear spectrum components of radiation noise of submarines can be eliminated. In this article, the piecewise vibration isolation system is designed and experimental research is carried out. Then, the measured signals are filtered and identified based on the improved wavelet transform and space grid method. Complex dynamic behavior of the system is observed in the experiment. This work has provided useful guide for engineering application of chaotic systems.
