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1、河海大學(xué)碩士學(xué)位論文典型丁壩拆除水動力條件研究姓名:聞云呈申請學(xué)位級別:碩士專業(yè):港口海岸及近海工程指導(dǎo)教師:王義剛;夏云峰20050301河海大學(xué)碩士論文AbstractAbstractItisgiantexploitationpotentialityinourcountrywitllthenumerousrivers.Itisinevitablytoencountertheactionbetweenthespurdikeandwatercurrent.Theflowofspurdikesisclassicalwaterpowerproblem.Theph
2、enomenonofcurrentinsomeengineeringissimilartocurrentofspurdikes.So,itisimportantforUStostudytheflowofspurdikes.Itiscotnruonoccurancetodemolishthespurdikesindailylifefordevelopmentofeconomy.Assoonasthesectionsofspurdikesareconcerned,itisscouringorsiltationinoriginallyplace.Itisimpor
3、tantforUStostudythehydrodynamicforceafterthesectionofspurdikesthoroughaswellasthepracticevalueandtheoryvalue.Firstly,weshouldmakeastudyofrecirculationtheoryandrecirculationformulainordertoanalyzethecauseofrecirculationformationandtheinfluencingfactorofrecirculationintensity.Theyare
4、theorybaseofphysicalmodelandmathematicalmodel.Secondly,weshouldstartwithNavier-Stokesequationandequationofcontinuity.Wea/soshouldmakestudyofftmdamentialtheory,suchasthefundamentialtheoryofphysicalmodel,thetheoryofcontrolsystemandthetheoryofsurfervelocitymeasurementsystem,Itoffersth
5、eorybasementforformationofphysicalmodel.Thirdly,weshouldStj.gtwithmomentumequationandequationofcontinuity.Theyoffertheorybasementthroughequationdispersion,interpolationofdisheveleddatasandanalysisofturbulencecoe丘iclent.Atlast,thecontrolequationofmathematicalmodel,thenumericalvaluec
6、alculationmeansandthesimulationofnumericalvaluebetweenthephysicalmodelandthemathematicalmodelhavebeenanalyzedbyphysicalmodelandthemathematicalmodel.Finally,anexampleofspurdikedemolishisstudiedandsomeproblemsarediscussed.Keywords:spurdikc,numericalmodel,physicalmodel,current,recircu
7、lation河海大學(xué)碩士論文第一章緒論第一章:緒論1.1問題的提出我國幅員遼闊,江河密布,海涂寬廣。治理江河及水陸建設(shè)、河灘、海涂圍墾等工程不可避免的遇到丁壩對水流作用及其對河道與海灘演變影響問題。與此同時,拆除丁壩所引起的水動力條件的改變及其對河道、海灘演變的影響也就應(yīng)運而生:雖然拆除丁壩是修建丁壩的反問題,但是為了更好的研究拆除丁壩后水動力條件的改變就必須從丁壩本身的特點入手,研究丁壩作用下水流的運動以及伴隨著的回流問題。[1-Sl丁壩是一種常用的整治建筑物,其壩根與河岸或順壩聯(lián)接,壩頭伸向河心,壩軸線與水流的方向正交或斜交,在平面上與河岸構(gòu)成丁字形,形
8、成橫向阻水的整治建筑物。按使用目的的不同,丁壩可分為