桩墩影响的一维和二维水动力数值研究
【摘要】：
【关键词】：
【学位授予单位】：河海大学
【学位级别】：硕士
【学位授予年份】：2007
【分类号】：TV135
【DOI】：CNKI:CDMD:2.2007.047460
【目录】：
【学位授予单位】：河海大学
【学位级别】：硕士
【学位授予年份】：2007
【分类号】：TV135
【DOI】：CNKI:CDMD:2.2007.047460
【目录】：
- ACKNOWLEDGEMENT4-5
- ABSTRACT5-11
- CHAPTER1 INTRODUCTION11-22
- 1.1 Back ground11
- 1.2.Literature review11-19
- 1.2.1.Basic concept of backwater11-12
- 1.2.2.Types of flow12-14
- 1.2.3.Expression of backwater14-16
- 1.2.4.Distance to point of maximum backwater16-17
- 1.2.5.Other backwater equations17-19
- 1.3.Method available19-20
- 1.4.Study objects and scope20-22
- CHAPTER2 METHODOLOGY OF NUMEHICAL MOD(?)22-46
- 2.1.Introduction to S.M.S22
- 2.2 RMA-2 two dimensional model22-31
- 2.2.1.Governing equations23-24
- 2.2.2.Time implicit equation of King24-25
- 2.2.3.Fully implicit time scheme25-27
- 2.2.4.Newton-Raphson scheme for convergence27-28
- 2.2.5.Initial condition28-29
- 2.2.6.Boundary condition29
- 2.2.7.Input parameter29-31
- 2.3.HEC-RAS one dimensional model31-46
- 2.3.1.Theory and background31
- 2.3.2.HEC-RAS governing equations31-38
- 2.3.3.Modeling bridges38-46
- CHAPTER3 RMA2 MODEL SIMULATION46-58
- 3.1 Description of study area46
- 3.2.Model description and data requirements46-48
- 3.2.1.Mesh generation46-47
- 3.2.2.Boundary condition47
- 3.2.3.Input parameter47
- 3.2.4.Model calibration and verification47-48
- 3.3.Analyzing the average water surface elevation results48-52
- 3.3.1.Analysis of the average water level's variation before construction48
- 3.3.2.Analysis of the average water level's variation during construction48-49
- 3.3.3.Analysis of the average water level's variation after construction49-52
- 3.4.Analyzing of water surface elevations in the cross-section52-54
- 3.5.Analyzing of velocity in the cross-section54-55
- 3.6.Analyzing of flow field in engineering area55-58
- CHAPTER4 HEC MODEL SIMULATION AND COMPARATION58-69
- 4.1.Model formulation58-60
- 4.1.1.Cross sectional data58
- 4.1.2.Manning's roughness coefficient58-59
- 4.1.3.Contraction and expansion coefficients59
- 4.1.4.Bridge geometries59
- 4.1.5.Bridge modeling approach59-60
- 4.1.6.Boundary condition data60
- 4.1.7.Verification of the calibration result60
- 4.2.Analyzing the simulation results for water surface elevation60-64
- 4.2.1.Analysis of the water level's variation before construction60-61
- 4.2.2.Analysis of the water level's variation during construction61
- 4.2.3.Analysis of the water level's variation after construction61-64
- 4.3.Analyzing the simulation results for velocity magnitude64-66
- 4.4.Comparison of the backwater from two models66-67
- 4.5.Comparison of the velocity from two models67-69
- CHAPTER5 CONCLUSIONS69-71
- 5.1.Conclusions69-70
- 5.2.Recommendations for future work70-71
- REFERENCES71-73
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