工程硕士论文正文

基于ANSYS的拱坝有限元仿真分析及其在病险水库除险加固中的应用重庆大学工程硕士学位论文学生姓名：李军指导教师：姚刚兼职导师：高强工程领域：水工结构重庆大学建筑与土木工程学院二O一三年四月FiniteelementsimulationanalysisofarchdambasedonANSYSanditsapplicationinthereinforcementofdangerousreservoirAThesisSubmittedtoChongqingUniversityinPartialFulfillmentoftheRequirementfortheDegreeofMasterofEngineeringByLiJunSupervisedbyYaoGangPluralisticSupervisedbyGaoQiangSpecialty：hydro-structureCollegeofArchitectureandCivilEngineeringofChongqingUniversity，Chongqing，ChinaApril2013重庆大学硕士学位论文中文摘要I摘要复杂的地形地貌和地质条件下拱坝有限元模型建立和非线性仿真分析是目前拱坝设计和分析中的重要研究课题。本文对拱坝的分析方法做了总结对比，研究了有限元分析中的可视化、参数化方法及它们实施技术，开发了基于ANSYS平台的拱坝有限元仿真分析系统，并结合实际工程对重庆市酉阳县境内胜利水库双曲拱坝进行了三维非线性有限元整体稳定仿真分析。首先，研究了有限元中的可视化理论、参数化技术和ANSYS软件的二次开发技术，介绍了拱坝有限元可视化建模的参数化原理和实施技术，以ANSYS为平台，利用ANSYS提供的UIDL、APDL等二次开发技术，开发了具有水工特色的拱坝仿真分析系统，利用它可较方便地对复杂地基上的拱坝进行有限元建模和仿真分析。然后，研究了有限元仿真分析的基本原理及其在ANSYS软件中的具体实现。阐述了三类非线性问题，讨论了弹塑性分析的基本方程和常用的强度准则，并较详细介绍了ANSYS中有限元仿真分析的基本过程。最后，对胜利水库双曲拱坝进行了有限元建模和三维非线性有限元仿真分析，计算分析了各种情况下坝体和基岩的应力位移规律，对大坝的整体安全度进行了综合评判。关键词：拱坝，有限元，仿真分析，ANSYS，除险加固重庆大学硕士学位论文英文摘要IIABSTRACTThemodelingandnonlinearFEMsimulationanalysisforarchdamdesignsisanimportanttopic，especiallyforthosearchdamstobebuiltinlocationsofcomplextopographicandgeologicalconditions.InthisPaper，briefsummaryandcontrastfortheanalyticalmethodsofarchdamwereconducted，thevisualizationandparameterizationofFEM，anditsimplementationwereinvestigated，andthesystembasedonANSYS，forthesimulationFEManalysisofarchdamwasdeveloped.And3-DnonlinearFEMsimulationanalysiswasthencarriedoutforShengLireservoirarchdam，whichislocatedinYouyangCounty，ChongqingProvinceofChina.ThevisualizationtheoryandparameterizationtechniqueforFEM，andsecondarydevelopingtechniqueforANSYSwerestudied.TheparameterizationprincipleforFEMmodelingofarchdamandtheimplementationtechniquewereintroduced.ByfullyusingofthesecondarydevelopingtechniquesprovidedinANSYS，suchasUIDL，APDLetc，aFEMsimulationanalysissystemofarchdambasedonANSYSwasdeveloped，bymeansofwhicharchdamsoncomplexfoundationcanbemodeledandanalyzedconveniently.BasictheoryofnonlinearFEManalysisanditsrealizationinANSYSwerestudied，threekindsofnonlinearstructuralbehaviors，thebasicequationsofelasticandplasticproblemandstrengthcriterioncommonlyusedwerediscussed.AndthebasicprocessofFEMsimulationanalysisinANSYSwasintroducedindetail.Finally，ShengLireservoirdouble-curvaturearchdamwasmodeledand3-DFEMsimulationanalysiswasperformed，soastofindouttheintegralsafetyfactorandthestressanddisplacementpatternsofdamanditsfoundationunderdifferentloadcombination.Keywords：archdam，finiteelement，simulationanalysis，ANSYS，reinforcementofdangerous.重庆大学硕士学位论文目录III目录摘要........................................................................................................IABSTRACT................................................................................................II目录....................................................................................................III1绪论.........................................................................................................11.1拱坝的发展概况...................................................................................................................11.2拱坝的结构特点...................................................................................................................21.3拱坝的应力分析方法...........................................................................................................31.4本文的主要内容...................................................................................................................52基于ANSYS的拱坝有限元几何实体仿真建模.................................62.1有限元方法简介...................................................................................................................62.2有限元软件ANSYS简介..................................................................................................102.3基于ANSYS的APDL技术特点.....................................................................................122.4应用APDL实现拱坝几何实体的仿真建模....................................................................133拱坝仿真分析在ANSYS中的实现...................................................273.1拱坝基于ANSYS的有限元分析流程..............................................................................273.2拱坝实体模型的有限元网格划分.....................................................................................293.3拱坝有限元模型的加载及求解.........................................................................................383.4拱坝基于ANSYS后处理的成果分析..............................................................................404工程应用...............................................................................................404.1工程概况和研究内容.........................................................................................................404.2胜利水库拱坝仿真建模.....................................................................................................404.3胜利水库拱坝仿真分析及结论.........................................................................................404.4胜利水库拱坝除险加固后运行效果.....................................................................