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ID:28936015
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时间:2018-12-15
《硕士论文-典型丁坝拆除水动力条件研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、河海大学硕士学位论文典型丁坝拆除水动力条件研究姓名:闻云呈申请学位级别:硕士专业:港口海岸及近海工程指导教师:王义刚;夏云峰20050301河海大学硕士论文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河海大学硕士论文第一章绪论第一章:绪论1.1问题的提出我国幅员辽阔,江河密布,海涂宽广。治理江河及水陆建设、河滩、海涂围垦等工程不可避免的遇到丁坝对水流作用及其对河道与海滩演变影响问题。与此同时,拆除丁坝所引起的水动力条件的改变及其对河道、海滩演变的影响也就应运而生:虽然拆除丁坝是修建丁坝的反问题,但是为了更好的研究拆除丁坝后水动力条件的改变就必须从丁坝本身的特点入手,研究丁坝作用下水流的运动以及伴随着的回流问题。[1-Sl丁坝是一种常用的整治建筑物,其坝根与河岸或顺坝联接,坝头伸向河心,坝轴线与水流的方向正交或斜交,在平面上与河岸构成丁字形,形
8、成横向阻水的整治建筑物。按使用目的的不同,丁坝可分为
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