基于ANSYS的拱坝有限元仿真分析

重庆大学硕士学位论文英文摘要ABSTRACTThe modeling and nonlinear FEM simulation analysis for arch dam designs is animportant topic,especially for those arch dams to be built in locations of complextopographic and geological conditions.In this Paper,brief summary and contrast for theanalytical methods of arch dam were conducted,the visualization and parameterizationof FEM,and its implementation were investigated,and the system based on ANSYS,for the simulation FEM analysis of arch dam was developed.And 3-D nonlinear FEMsimulation analysis was then carried out for ShengLi reservoir arch dam,which islocated in Youyang County,Chongqing Province of China.The visualization theory and parameterization technique for FEM,and secondarydeveloping technique for ANSYS were studied.The parameterization principle for FEMmodeling of arch dam and the implementation technique were introduced.By fullyusing of the secondary developing techniques provided in ANSYS,such as UIDL,APDL etc,a FEM simulation analysis system of arch dam based on ANSYS wasdeveloped,by means of which arch dams on complex foundation can be modeled andanalyzed conveniently.Basic theory of nonlinear FEM analysis and its realization in ANSYS werestudied,three kinds of nonlinear structural behaviors,the basic equations of elastic andplastic problem and strength criterion commonly used were discussed.And the basicprocess of FEM simulation analysis in ANSYS was introduced in detail.Finally,ShengLi reservoir double-curvature arch dam was modeled and 3-D FEMsimulation analysis was performed,so as to find out the integral safety factor and thestress and displacement patterns of dam and its foundation under different loadcombination.Keywords:arch dam,finite element,simulation analysis,ANSYS,reinforcementof dangerous.