振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2010年
1期
48-52
,共5页
姚熊亮%计方%钱德进%庞福振
姚熊亮%計方%錢德進%龐福振
요웅량%계방%전덕진%방복진
波动分析法%偏心阻振质量%波型变换%连接方式%隔声量
波動分析法%偏心阻振質量%波型變換%連接方式%隔聲量
파동분석법%편심조진질량%파형변환%련접방식%격성량
wave analysis method%eccentric blocking masses%wave conversion%sound transmission loss
利用波动理论的分析、处理方法,分析了偏心阻振质量阻抑振动波传递的特性,给出了偏心阻振质量对平面弯曲波传递的阻抑公式;相应的模型实验表明测试数据与理论推导结果趋势一致;并分析了阻振质量连接方式对其隔振性能的影响.借助数值仿真手段,将偏心阻振质量引入水下双壳动力舱段的减振降噪中.结果表明:阻振质量偏心布置时与其固定的船体板中发生波型变换,衍生波产生附加隔声量,且附加隔声量的量值主要取决于波型变换的程度;偏心阻振质量有效的抑制了双壳动力舱段中高频段的声辐射.
利用波動理論的分析、處理方法,分析瞭偏心阻振質量阻抑振動波傳遞的特性,給齣瞭偏心阻振質量對平麵彎麯波傳遞的阻抑公式;相應的模型實驗錶明測試數據與理論推導結果趨勢一緻;併分析瞭阻振質量連接方式對其隔振性能的影響.藉助數值倣真手段,將偏心阻振質量引入水下雙殼動力艙段的減振降譟中.結果錶明:阻振質量偏心佈置時與其固定的船體闆中髮生波型變換,衍生波產生附加隔聲量,且附加隔聲量的量值主要取決于波型變換的程度;偏心阻振質量有效的抑製瞭雙殼動力艙段中高頻段的聲輻射.
이용파동이론적분석、처리방법,분석료편심조진질량조억진동파전체적특성,급출료편심조진질량대평면만곡파전체적조억공식;상응적모형실험표명측시수거여이론추도결과추세일치;병분석료조진질량련접방식대기격진성능적영향.차조수치방진수단,장편심조진질량인입수하쌍각동력창단적감진강조중.결과표명:조진질량편심포치시여기고정적선체판중발생파형변환,연생파산생부가격성량,차부가격성량적량치주요취결우파형변환적정도;편심조진질량유효적억제료쌍각동력창단중고빈단적성복사.
The characteristics of eccentric blocking masses attenuating propagation of vibration wave were analyzed on the basis of wave analysis method,and the formula for impeding plane bending wave transmisstion was deduced.The corresponding model test indicated that the varying tendency of the measured data was consistent with that of the data obtained by theoretical calculation.Meanwhile, eccentric vibration isolation masses were introduced in the vibration isolation and noise reduction of power sections of a double-cylindrical shell through numerical simulation.The results showed that arranged eccentric blocking masses convert waves in the mounted plate of a ship hull; the derivative wave generates additional sound transmission loss (relative to the symmetric arrangement); and the additional sound transmission loss mainly depends on the leval of wave conversion; eccentric vibration isolation masses can effectively impede sound radiation with higher frequencies in the double-cylindrical shell power sections.