高速铁路声屏障气动载荷特性的实验分析

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1、万方数据北京交通人!学硕十学位论文ABSTRACTABSTRACTInrecentyears，buildingahigh-speedrailwayismoreandmorepopulararoundtheworld．Atpresent，thetrainwhichhasreachedspeedof350km／hhasrolledofftheproductionline，andthetrainprojectthatwillcomeupwiththespeedofmorethan400km／hisgoing

2、on．However,withtherapiddevelopmentofhigh-speedrailwaytraffic，theaerodynamicnoisepollutioncausedbythetrainismoreandmoreserious．Noisebarrierisoneofthemostimportantandeffectivewaystoreducenoisepollution．Theaccelerationofthetrainspeedmakestheaerodynamicsloa

3、dsmoreandmoreintense，italsemakesadramaticstructuralresponsetothesoundbarriers．Thusitthreatsthesafetyofrailwaysystem．InordertoensurethesoundbarrierstructureCanworksafety,itisrequestedtoreducethenoisewell，alsotohaveagoodstructurefordynamicperformance．Inth

4、ispaper,I'mbasedonthehigh—speedtrain’Sexperimentalresearchoftheaerodynamicloadonthesoundbarrier．Themainworkisasfollows：(1)Doesaresearchontestsystemofthehigh-speedrailwaynoisebarrieronaerodynamicload．Itmakesaselectionandapplicationofthetestsystemsoftware

5、andhardwaremodules．Thendebugsandverificatesthesystemhatbasedonthetestingtheory．Therusultshowsthatthetestsystemcanachievethefunctionofstabledataacquisition．Therusultbetweenwindtunnel’Sexperimentandtheoreticalvalueshowsalowdeviationrate，SOthetestperforman

6、ceofthesystemishighandeffective．(2)Designstheprogramofaerodynamicload．Inordertoeffectivelytesttheaerodynamicloadofkeyposition，thispaperanalyzesanddemonstratestheprogram，finallydesignstomeettherequirementsofthestudyinthetestplan．Basedonthis，completesthea

7、erodynamicloadtestundertheconditionofdifferenttrainoperation．(3)Studiesthefluctuatingpressureonthesurfaceofnoisebarrier．Basedontheexperimentaltestresults，thispaperanyliesthetimeand行equencydomainpropertiesoffluctuatingpressure，thenanyliesthespatialdistri

8、butionandspeedcharacteristicsofthepeakvalueoffluctuatingpressure．Also，itstudiestheinfluenceonthefluctuatingpressureofthetrain’Smodelsandgivestheempiricalformulaofthemaximalpeakvalueoffluctuatingpressureandtheimpactstrength．Therus