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1、StudyonthehydrodynamicperformanceofasubmergedperforatedwallbreakwaterabstractBreakwatersareusedtoprotectcoastlines,coastalstructureandharborbasin.Traditionalbreakwatersaresurface-piercingandthenaffecttothecoastallandscape.Submergedbreakwaterscanreflectan
2、ddissipatetheenergyofincidentwavesandthenreducethedamageofstructuresandshorelineswithoutaffectingthecoastallandscape.Nowbreakwatersaremakingtowarddevelopedaspermeablebreakwatersandmulti-functionalbreakwaters,suchashorizontalplatebreakwaters,perforatedcai
3、ssonsandsemi-circularperforatedbreakwaters.Onthebasisoftraditionalperforatedcaissons,wepresentanewsubmergedperforatedwallbreakwaterwithbetterwave-absorbingperformance.Thisworkstudiesthehydrodynamicperformanceofsubmergedperforatedwallbreakwaterbyphysicalm
4、odeltestandtheoreticalanalysis.Thereflectioncoefficient,transmissioncoefficientandwaveforcesactingonthebreakwaterareexamined.Experimentaltestswereconductedinawave-currentflumeofShandongProvincialKeyLaboratoryofOceanEngineering.Theeffectsofrelativechamber
5、widthB/L,relativewaterdepthd/L,porosityoffrontplate?andrelativewaveheightH/donthereflectionandtransmissioncoefficientsareexaminedbasedontheexperimentaldata.Ananalyticalsolutionofwaveinteractionwiththeperforatedwallbreakwaterisdevelopedbasedonthematchedei
6、genfunctionexpansions.Thereflectionandtransmissioncoefficientsandwaveforcesareexamined.Theanalyticalresultsforthereflectionandtransmissioncoefficientsarethesameaspreviousanalyticalandnumericalresultsandagreewellwithexperimentaldata.Theoptimumparametersfo
7、rthesubmergedperforatedwallbreakwaterare:d/h=0.1–0.2,B/L=0.3–0.4,ε=0.1–0.2.Atthistime,thebreakwaterhasbetterwaveabsorbingperformancewithlowreflectionandtransmissioncoefficientsandlowwaveforce.Efficientsheltercanbeprovidedforleesideregionsandthescourinfro
8、ntofthestructureissuppressed.Theseareofsignificantinpractice.Keyword:Submergedperforatedwallbreakwater;Reflectioncoefficient;Transmissioncoefficient;Waveforce;AnalyticalSolution目錄1、緒論.......................................
