泥石流冲击信号识别方法研究

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1、分类号!!丝：望密级单位代码10618学号106280622墨麽交迫戈肇硕士学位论文论文题目：泥石流冲击信号识别方法研究研究生姓名：亟玉莲导师姓名、职称：堕湛塾麴援盟墨专业名称：港口、海岸及近海工程论文答辩日期学位授予单位答辩委员会主席：刘光华教授级高工评阅人：刘光华教授级高工2009年4月陈野鹰教授ABSTRACTFrequelmyoccurringinmountainvalleyorslopingfield，debrisflowisonel(indotsolid．1iquidtwo．phaseflowwhichcon

2、tainingamassofsandblockandbowlder．Ithasmanvcharacteristicssuchasbreakingoutabruptly,timebrevity,vigorferocity,andt减cal锄ityere．Nowitbasbecomeolleofthemostactivesurfacedynamicphysiognomyprocesses．Impactforceofdebdsflowisasortofdynamicloadingwhendebrisflowgoesforwar

3、dtoimpactallthetingstouched．Itistheloadgisttoactualizecontrollmgproiectsofdebrisflow．Basedontheresearchofkinematicsanddynamicsofdebnsnow，thepaperhasstudiedimpactforceofdebrisflowwithmanifoldnumericalcalculatioas．Themaincontentsandconclusionsinclude：First，thep印erh

4、asestablishedaexperimentationmodelofdebrisflowandexperirnentalizedaccordingto0．3-0．8cm、0。8-15cm、1．5～3．0cmthreesolldph嬲edi锄eterS．0．02、0．08、0．16、0．20、0．25fivesolidphaseratios·AtthesametimeitattainedmoremaIl85000datausingbridgesensor’dynamicstraingaugeandlligh-speed

5、vidiconetcandestablishedmorethan40dynamicimpactsignalsatdlt：terentstates．Dependingontheresultofexperimentation，thevelocityisdecreasing，buttheimpaCtofdebrisflowtakeonincrescentcurrentalongwiththeaugmentationotsolldphaseratios．Second．basedonwaterforcarrier,theimpac

6、tforcecurvesofdebrisflowhavebeenregardedaSonekindofpressurefluctuationsignalstobeanalyzed·Bytheresearchoneverykindimpactsignalofdebrisflow,thepaperhasestimatedandanalyzedtheaverage，standarddeviation，maximum，normaldistributioncuⅣesaIldthevelocityofdebrisflow．So，th

7、echaracteristicparametersrelativingtothelmpactslgnalsofdebrisflowhavebeenpicked—up．Third．basedthecharacteristicsofimpactsignalsofdebrisflow,thepaperhasuseddi虢rentⅥraveletanalysismethodstodenoisethesignalsinordertofindingmoreobvious臼endoftheimpactsignals．Takingthe

8、B一3impactsignalforobject，thepaperhaVemal(euseofthetime．丘equencylocalizationfunctionsofwaveletanalysetodistlllthesigllalfrequencyofenergydistributing．Thenit’skn