隨機海浪波峰長度統(tǒng)計特征及其對VLFS作用影響的研究.pdf

1、中國海洋大學碩士學位論文隨機海浪波峰長度統(tǒng)計特征及其對VLFS作用影響的研究姓名：張寒元申請學位級別：碩士專業(yè)：港口、海岸及近海工程指導教師：于定勇2003.7.1StatisticalcharacteristicsofcrestlengthsandtheirinfluenceonVLFSAbs仃actThedimensionoftheverylargefloatingstructures(VLFS)isusuallymorethan1

2、kmThedesignofsuchgiantstructuresmustconsiderthespatialcoherenceofwavesCrestlengthiSoneofthemainparametersinwavecoherenceInthisdissertationtheprogressintheresearchesofspatialcoherenceofrandomwavesiSreviewedBasedontllisstu

3、dieshavebeencarriedoutforthestatisticalcharacteristicsofcrestlengthsandtheirinfluenceonVLFSThemainpointsofthedissertationareasfollow：奪Acleardefinitionof3Dwavecrestandadescriptionoftheprocedurestodetecttheboundaryofwavecr

4、estarepresentedbasedonGoda’SdefmitionByusingrandomwavetheoryanddirectionalwavespectrum，aMATLABplatformedprogramisdesignedtosimulaterandomwavecrestsforvariousdirectionalspectralconditionsinde印water奪Statisticsofwavecrests謝

5、tIldifferentdirectionalspreadingparametersanddifferentdirectionalfunctionsareobtainedanddiscussedJONSWAPspectrumandthedirectionalfunctionsuggestedbyMitsuyasu，DonelanandWenrespectivelyareemployedintheanalyses奪Statisticaid

6、istributionofwaveCrestcharacteristicssuchascrestlength，crestheight，anddirectionalanglesbasedontheabovemensionednumericalsimulationof3DrandomwavesareanalyzedTheresultshowsthedistributionsofwavecrestsarenolongerunifoHnandc

7、ontinuousbuthavedifferentdistributionsafterconsideringthedirectionalinformationnedistributionofcrestlengthiSgreatlYinfluencedbythedirectionalfunctionThewiderrangeofthedirectionaldistributionofwaveenergy，tlleshorterofthem

8、eancrestlengthsandthewiderrangeofthedistributionofcrestdirectionalangles11leerestheightanderestlengthshowahighrelativitywhilethecrestheightsarelowandbecomeindependenceatveryhighcrestheight奪AbriefintroductionofSyntheticAp

9、ertureRadar(SAR)andtheapplicationofSARimagedataintheresearchofcrestlengthdistributionisintroducedThemethodtocomputetheactionofrandomwaveswimdifferentcrestlengthsonVLFSisalseviewedBothCanbeservedasabasisforfurtherstudyint