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1、振动与冲击第32卷第22期JOURNALOFVIBRATIONANDSHOCKVol.32No.222013??????????????????????????????????????????????????无限大单向加筋层合板隔声性能研究11211陈林,庞福振,陈海龙,金叶青,姚熊亮(1.哈尔滨工程大学船舶工程学院,哈尔滨150001;2.哈尔滨工业大学航天学院,哈尔滨150001)摘要:基于经典层合板理论,计及加强筋弯曲及扭转运动影响,建立无限大单向加筋层合板在平面声波激励下的声透射理论模型;应用空间谐波展开与虚功原理,推导出单向加筋层合板传声损失公式,并与解析解及简化模型计算
2、结果对比,验证所建模型的精度及有效性;系统研究特征参数对加筋层合板结构隔声性能影响。研究表明:增加层合板铺设角度对结构隔声性能不利,材料损耗因子只影响结构共振频率处隔声性能;增大加强筋间距,加筋层合板结构低频段隔声性能下降明显,但全频段隔声性能有所改善;声波入射角度对单向加筋层合板隔声性能影响显著,结构对垂直入射声波隔声效果最好。关键词:经典层合板理论;加筋层合板;隔声;空间谐波展开法中图分类号:TB53文献标识码:ASoundinsulationperformanceofaninfinitesinglestiffenedlaminatedplate11211CHENLin,PAN
3、GFu?zhen,CHENHai?long,JINYe?qing,YAOXiong?liang(1.CollegeofShipbuildingEngineeringofHarbinEngineeringUniversity,Harbin150001,China;2.SchoolofAstronautics,HarbinInstituteofTechnology,Harbin150001,China)Abstract:Basedontheclassicallaminatedplatetheoryandtakingtheinfluenceofbendingandtorsionalmov
4、ementofstiffenersintoaccount,thetheoreticalsoundtransmissionmodelofaninfinitesinglestiffenedlaminatedplateexcitedbyaplanesoundwavewasdeveloped.Thetransmissionloss(TL)expressionwasderivedbyusingthespaceharmonicexpansionandtheprincipleofvirtualwork.Then,theaccuracyandeffectivenessoftheproposedmo
5、delwasqualifiedbycomparingmodelpredictionswithcalculationresultsintheliterature.Finally,theimpactofdifferentparametersonthesoundinsulationperformancewasstudiedthroughnumericalcalculation.Theresultsindicatethattheincreaseoflayinganglehasnobenefitsforthesoundinsulationperformance.Materiallossfac
6、toronlyaffectsthesoundinsulationatstructuralresonancefrequency.Withinthelowfrequencyrange,thesoundinsulationperformancedecreasessignificantlyasthestiffenerspacingisincreased.But,inthewholefrequencyrange,thesoundinsulationperformanceisimproved.Theangleofincidentwaveplaysanimportantroleinsoundin
7、sulation.Theobliqueincidentsoundwavetransmitsthroughthestructuremoreeasilythanthenormalincidentsound.Keywords:classicallaminatedplatetheory;stiffenedlaminatedplate;soundinsulation;spaceharmonicexpansionmethod[3-7,14]复合材料层合板较金属板具有质量轻、强度刚
