公路聲屏障優(yōu)化研究.pdf

1、JFIIrJ!rlll!HIf!lr!lr!lrlrtrlrllllY1526898分類號：U49；F510710—20050810壤爹太海碩士學(xué)位論文導(dǎo)師姓名職稱申請學(xué)位級別論文提交日期學(xué)位授予單位公路聲屏障優(yōu)化研究蔣康劉浩學(xué)教授答辯委員會主席李百川教授學(xué)位論文評閱人趙建有教授付曉鳳副教授AbstractWiththerapidlydevelopmentofroadtraffic，thepollutionoftrafficnoiseh

2、asbecomemoreandmoresevere，thathavebeendisturbedtheresidentsalongtheroadNoisebarrierisoneoftheeconomicalandeffectiveengineeringmeasuresinpreventingtrafficnoisepollutionSotheoptimizationofnoisebarriers舔topromotetheperforma

3、nce，toimprovetheacousticalenvironment，hasimportantpracticalsignificanceintermsofadvancingthecoordinatedandbalancedprogramofdevelopmentbetweenroadtrafficandenvironmentBasedontheinvestigationofcurrentpollutionsituation，pro

4、ductioncauses，frequencyspecUumdistributionandpropagationcharacteristicsofroadtrafficnoise，thisdissertationanalyzethetheoryofnoisebarriersInviewoftheshortcomingsofcalculationmethodsin‘designandmeasBrestandardofacousticbar

5、rierNoHJ／T902004’，andinconnectionwithproblemsofapplicationforthemadnoisebarriersinourcountryinsertionlossofnoisebarriersforDiscrete—linearsoundsourceshasbeenresearchedinthisdissertationandbuildthecalculationmodel，whichCa

6、nbeappliedtoacousticbarriersdesigningundertheDiscretelinearsoundsources(200veh／h800veh／h)conditionbyusingofALdcorrectioncurveResearchingonsoundabsorptionnoisebarriers，thisdissertationintroducesacalculatemethodaboutthenoi

7、sedecreasingbyabsorbingandestablishedanewmethodwhichcanchoosethegoodsoundabsorptionmaterialThismethodhasmoreapplicationvalueinengineeringcomparingwithevaluationmethodin‘Thegradationofsoundabsorptionpropertyforabsorbentpr

8、oducts’(GB／T167311997)AnalyzeDopplerEffectanditsinfluencesontheeffectivenessofreducingtheroadnoisebarriers，andputforwardoptimizationmeasu_re8aboutenlargingtheshieldingangleinthefrontendandtheeffectiveheightwhichwasdecrea

9、sedgraduallyfromthefrontCndtothebackendThisworkprovidedsomebasesandreferencestooptimizethedesigningofnoisebarriers，choosingsoundabsorptionmaterial，andscientificallydelimitatingthefrontendandthebackendinstallationposition