桥塔绕流与流固耦合的数值模拟

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1、北京交通大学硕士学位论文桥塔绕流与流固耦合的数值模拟姓名：施耀华申请学位级别：硕士专业：桥梁与隧道工程指导教师：齐梅兰20080601AbstractABSTRACT：Thebridgeplaysallindispensablepartintrafficandtransportationinmodemsocieties．Especiallyinrecentyears，thedevelopmentofthree-dimensionaltraffichashighlightedtheroleofbridgesintraffic．Asscienceandtechnolo

2、gyconstantlydevelop，theprogressinbridgedesignandapplicationisratherremarkableandthenumberoflarge·-spancable·-stayedandsuspensionbridgesisalsoontheincrease．Thebridgetoweristhemajorbearingstructureforalarge-spancable-stayedorsuspensionbridgeandiscrucialforthesafetyandstabilityoftheentir

3、ebridge．Ingeneral，large-spancable-stayedandsuspensionbridgesrequirebridgetowerswithalengthofmorethantensorhundredsofmeters．Duetotheunproportionateslendernessratio，thebridgetOWerbecomesvulnerabletoairandthuseasytobedistortedortovibrate，whichwillaffectthestabilityoftheentirebridgestruct

4、ure．Therefore,itisofgreatsignificancetoearlyoutallin—depthresearchontheforcefeatureofthebridgetowerinaflowfield．Thispaperconductsanumericalsimulationanalysisonthefluid-solidcouplingofthebridgetowerandairbyadoptingCFDapproach．ItutilizestheFEMsoftwareANSYS／FLOTRANandRNGk一占modeltodonumer

5、icalsimulationanalysisontheflowaroundcolumnandsquarecylinder．Furthermore，asimplifiedmodelofabridgetowerisestablished，whichiSusedforthenumericalsimulationanalysisonthefluid．solidcoupling．Thepaperpresentsthefiguresofvectorfield，speedandpressuredistribution．Basedontheanalysisontheflowfie

6、ld，thepapersummariestheforcefeatureofastructureinaflowfieldandaccordinglyputsforwardreasonablesuggestionsonthedesignofastructureinthewindfield．KeyWords：bridgetower；numericalsimulation；CFD；ANSYS／FLOTRAN；fluid-solidcouplingCI．ASSNO：TE319IV学位论文版权使用授权书本学位论文作者完全了解北京交通大学有关保留、使用学位论文的规定。特授权北京

7、交通大学可以将学位论文的全部或部分内容编入有关数据库进行检索，并采用影印、缩印或扫描等复制手段保存、汇编以供查阅和借阅。同意学校向国家有关部门或机构送交论文的复印件和磁盘。(保密的学位论文在解密后适用本授权说明)学位论文作者签名：导师签名：签字日期：年月日签字日期：年月日独创性声明本人声明所睾交的学位论文是本人在导师指导。卜．进行的研究I：作和取得的研究成果。除了文中特别加以标注和致谢之处外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得北京交通人学或其他教育机构的学位或证-15而使刚过的材料。与我一同．I：作的同忠对本研究所做的任何贡献均已在论文中

8、作了明确的