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Matrix Discrete Element Analysis of Geological and Geotechnical Engineering


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Matrix Discrete Element Analysis of Geological and Geotechnical Engineering
  • 书号：9787030674074
    作者：刘春
  • 外文书名：
  • 装帧：平装
    开本：B5
  • 页数：305
    字数：无
    语种：en
  • 出版社：科学出版社
    出版时间：2021-04-01
  • 所属分类：地质学
  • 定价： ￥199.00元
    售价： ￥157.21元
  • 图书介质:
    纸质书

  • 购买数量： 件  可供
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本书介绍了MatDEM的基本结构、建模方法、数值计算过程、后处理和系统功能，它应用了离散元法的基本原理和算法。离散元法可以有效地模拟岩土体的不连续性、不均匀性和大变形破坏。在科研和工业领域都得到了广泛的应用。在创新矩阵离散元计算方法的基础上，作者从无到有，开发了高性能的离散元软件MatDEM，可以处理数百万个元素的离散元数值模拟。本书还介绍了多个在地质与岩土工程中的应用实例，包括岩土工程基本问题、离散元试验、三维滑坡、动态与多场耦合函数等。教学视频和相关软件可在MATDEM网站上查询。
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目录

  • Contents
    Foreword I Foreword II Preface
    Chapter 1 Principles and Implementation of DEM 1
    1.1 Application and Numerical Calculation Software of DEM 1
    1.2 Basic Principles of DEM 4
    1.2.1 Contact Model of Elements 4
    1.2.2 Connection of Two Different Elements 6
    1.2.3 Time Step Iterative Algorithm 6
    1.3 Damping Harmonic Vibration of Elements 7
    1.3.1 Damping Force of Elements 7
    1.3.2 Equation of the Damping Harmonic Vibration 8
    1.3.3 Relation Between Vibration Period and Element Radius 9
    1.3.4 Differences of the Element Motion 9
    1.3.5 Damping and Optimal Damping Coefficient 10
    1.4 Energy Conversion and Energy Conservation of DEM 13
    1.4.1 Mechanical Energy of Systems 13
    1.4.2 Calculation of Heat 14
    1.4.3 Energy Conservation and External Work 16
    1.5 Calculation Scale and Engineering Application Feasibility of DEM 17
    1.6 Understanding and Solution to the Three Major Issues in DEM 19
    1.6.1 High-Performance Matrix Computing of the Discrete Element Method 19
    1.6.2 Quantitative Modeling Problem of DEM 21
    1.6.3 Multi-field Coupling Method Based on DEM 24
    1.7 Development and Prospect of MatDEM 25
    Chapter 2 The Basic Structure of MatDEM 28
    2.1 The Software Foundation 28
    2.1.1 The Operating Environment and Software Installation 28
    2.1.2 The Windows Program for MatDEM 30
    2.1.3 Operation and Termination of the Software 34
    2.1.4 A Brief Introduction to the Application of the Software 35
    2.1.5 A Brief Introduction to the Help File 38
    2.2 The Program Structure of MatDEM 39
    2.2.1 The Software Folders of MatDEM 39
    2.2.2 The Hierarchical Structure of MatDEM 39
    2.2.3 The Main Classes in MatDEM 41
    2.3 Types of Element in MatDEM 44
    2.3.1 Active Element, Wall Element, and Virtual Element 44
    2.3.2 Fix the Degree of Freedom of Elements 45
    2.3.3 The Rule of Numbering Elements 46
    2.4 The Data Structure of MatDEM 46
    2.4.1 The Property Arrays of Elements 46
    2.4.2 The Neighbor Matrix and Connection Information Matrix 47
    2.4.3 The Data Structure and Operation of Groups 50
    2.5 The Contact Model Between Elements 53
    2.5.1 The Linear Elastic Contact Model 53
    2.5.2 The Hertz Contact Model 53
    2.6 The Elastic Clump 55
    2.6.1 The Principle of the Elastic Clump 55
    2.6.2 Usage of the Elastic Clump 57
    Chapter 3 Geometric Modeling and Material Setup 60
    3.1 Building a Numerical Simulation Box 60
    3.1.1 Building a Packing Model 60
    3.1.2 Creating an Empty Box 64
    3.2 The Foundation of Modular Modeling 65
    3.2.1 Modeling with a Structure 65
    3.2.2 Element Filtering 71
    3.2.3 Tool_Cut and Digital Elevation Model 73
    3.3 Modeling Based on Digital Images 75
    3.3.1 Importing a Binary Image to Cut a Model 75
    4.5.1 Compression of Files 120
    4.5.2 Saving and Reading of Files 121
    Chapter5 Post-processing and System Functions 123
    5.1 Post-processing Window Interface 123
    5.1.1 Main Post-processing Window 123
    5.1.2 Saving the Post-processing Figure 125
    5.1.3 Making GIF Window 127
    5.2 Post-processing Drawing Functions 129
    5.2.1 General Drawing Function d.show 129
    5.2.2 Slice Display and Filter Display 135
    5.2.3 Element Position and Force Display 137
    5.3 Data Processing and Curve Drawing 138
    5.3.1 Drawing Curves with Saved Data 138
    5.3.2 Drawing Curves with MatDEM Automatically Recorded Data 139
    5.3.3 Processing Data and Plotting in MATLAB 141
    5.4 System Functions 143
    5.4.1 GPU Computing Settings and Status Viewing 143
    5.4.2 Definition and Operation of Functions 145
    5.4.3 Batch Processing of Code Files 146
    5.4.4 Random Seed and Stochastic Model 147
    5.4.5 Timing Functions 147
    5.5 Modeling with System Underlying Functions 148
    5.5.1 Underlying Modeling of the Two-Ball Collision Process 148
    5.5.2 Use Graphs to Analyze Collision Processes 151
    Chapter 6 Basic Application of Geotechnical Engineering 153
    6.1 Pile-soil Interaction 153
    6.1.1 Packing Model of Particles 153
    6.1.2 Build a Pile-Soil Interaction Model 156
    6.1.3 Numerical Simulation of the Pile Pulling Process 161
    6.2 Tunnel Modeling 164
    6.2.1 Packing Model of Particles 165
    6.2.2 Build a Tunnel Model 165
    6.2.3 Loading and Numerical Simulation 170
    6.3 TBM Cutter Rock Breaking 173
    6.3.1 Packing Model of Particles 173
    6.3.2 Build a Model of TBM Cutter Rock Breaking 174
    6.3.3 Numerical Simulation Process of Rock Breaking with Hob 178
    6.3.4 Improve the Calculation Speed of Rock Breaking with Hob 181
    Chapter 7 Rock-Soil Body Discrete Element Tests 183
    7.1 Direct Shear and Torsional Shear Tests 183
    7.1.1 Define Test Parameter and Accumulate Sample 184
    7.1.2 Making a Shear Box and Cutting Sample 185
    7.1.3 Putting the Sample into the Shear Box 191
    7.1.4 Material Setting and Numerical Simulation 193
    7.2 True Triaxial Test and Joint Modeling 197
    7.2.1 Build a True Triaxial Test Chamber 197
    7.2.2 Defining Fracture Surface Using Triangle Faces and Polygons 199
    7.2.3 Defining Complex Joint Surfaces Using Tool_Cut 202
    7.2.4 Applying True Triaxial Stress 207
    Chapter 8 Modeling of Complex 3D Models 209
    8.1 Defining 3D Surfaces with Digital Elevation 210
    8.1.1 Defining Digital Elevation Model Using Discrete Points 210
    8.1.2 Processing of Digital Elevation Data at the Surface 212
    8.2 Building a Thin Shell Model 218
    8.2.1 Building a Geometric Model 219
    8.2.2 Cutting and Packing Model 221
    8.3 Building a Three-Dimensional Slope Model 225
    8.3.1 Import Material 225
    8.3.2 Set the Material for the Stratum 226
    8.4 Numerical Simulation of Landslide’s Motion Process 229
    8.4.1 Setting of Numerical Simulation Parameters 229
    8.4.2 Iterative Calculations and Simulation Results 230
    Chapter 9 Numerical Simulations of Dynamic Action 232
    9.1 Meteorite Impact on the Earth 232
    9.1.1 Packing Model of Particles 233
    9.1.2 Building a Meteorite Model 234
    9.1.3 Simulation of Meteorite Impact Process 238
    9.2 Mine Slope Blasting 240
    9.2.1 Slope Model 240
    9.2.2 Setting the Blasting Point and Blasting Energy 243
    9.2.3 Iterative Calculations and Simulation Results 245
    9.3 Seismic Wave Propagation 246
    9.3.1 Establishment of Topography and Stratification 247
    9.3.2 The Generation and Propagation of Seismic Waves 250
    Chapter 10 Multi-field Coupling Numerical Simulation 254
    10.1 Friction Heat Generated by Landslide Slipping 254
    10.2 Microwave-Assisted Rock Breaking 257
    10.2.1 Building a Clump Packing Model 257
    10.2.2 Grouping and Material Setting of Pyroxene and Feldspar 258
    10.2.3 Numerical Simulation of Pyroxene Thermal Expansion 262
    10.3 Thermal Coupling of Energy Pile 265
    10.3.1 Establish an Energy Pile-Stratum Model 265
    10.3.2 Numerical Simulation of Thermal Coupling Process 269
    10.4 Ground Subsidence and Ground Fissures 273
    10.4.1 Cutting the Stratum Model 273
    10.4.2 Numerical Simulation of the Decline of Water Level 274
    References 377
    Appendix Properties, Functions and Frequently Asked Questions 281
    Appendix A Properties of Classes 281
    Appendix B Main Functions 288
    Appendix C Frequently Asked Questions 302
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