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Ship Hull Fitting and Stability Calculation

作　者: Syed Tauseef Ahmed
导　师: Ding Yong
学　校: 哈尔滨工程大学
专　业: Naval Architecture
关键词: NURBS Master interpolation waterline sections surfaces software stability skinning knots ruled rational Engineer moment Bezier feature extrude Spline shape interpolating
分类号: U672
类　型: 硕士论文
年　份: 2006年
下　载: 7次
引　用: 0次
阅　读: 论文下载

内容摘要

全文目录

Acknowledgement  6-13
Chapter 1 INTRODUCTION  13-15
  1.1 Overview and Background  13-14
  1.2 Objectives and Scope of the Work  14
  1.3 Structure of Thesis  14-15
Chapter 2 OVER VIEW OF METHODS FOR SURFACE FITTING  15-21
  2.1 Introduction  15
  2.2 NURBS Curve Design Methods  15-16
    2.2.1 NURBS Interpolation  16
    2.2.2 NURBS Approximation  16
  2.3 Surface Design Methods  16-17
    2.3.1 Surface Interpolation  17
    2.3.2 Surface Fitting  17
    2.3.3 Cross Sectional Design  17
  2.4 Methods Used for Curve Design  17-18
  2.5 Advantages and disadvantages of NURBS  18-19
  2.6 Methods Used for Surface Design  19-21
    2.6.1 NURBS Ruled Method  20
    2.6.2 Cross-Fix Method  20-21
Chapter 3 NURBS FORMULATION  21-36
  3.1 Bezier,B-Spline and NURBS  21-22
  3.2 B-spline Curves:  22-23
    3.2.1 Definition  22
    3.2.2 B-spline Basis Function  22-23
  3.3 NURBS Curves:  23-27
    3.3.1 NURBS:Definition  23-26
    3.3.2 NURBS:Knot Vector  26-27
  3.4 Knot Insertion:  27-29
    3.4.1 Inserting a Single Knot  27-28
    3.4.2 Inserting a Knot Multiple Times  28-29
  3.5 NURBS Curves:Knot Insertion  29
  3.6 De Boor's Algorithm:  29-30
  3.7 De Boor's Algorithm for NURBS:  30-31
  3.8 B-spline Curves:Computing the Coefficients:  31-33
  3.9 B-Spline Surfaces:Construction  33
  3.10 B-Spline Surfaces:De Boor's Algorithm  33-35
  3.11 NURBS Surfaces  35-36
Chapter 4 NURBS CURVE DESIGN  36-44
  4.1 Introduction  36
  4.2 Parameter Selection  36-37
  4.3 The Chord Length Method  37-38
  4.4 Curve Global Interpolation  38-40
  4.5 Gaussian Elimination Method  40-41
  4.6 Ship Sections and Waterlines Design  41-44
Chapter 5 SHIP SURFACE GENERATION  44-59
  5.1 Introduction  44-45
  5.2 Nomenclature  45
  5.3 NURBS Ruled Surface  45-51
    5.3.1 Ruled Surface Generation:Using Sections  46-48
    5.3.2 Ruled Surface Generation:Using Waterlines  48-49
    5.3.3 Results and Discussion  49-51
  5.4 Cross Fix Method  51-57
    5.4.1 C-F Surface Generation:Using Sections  52-55
    5.4.2 C-F Surface Generation:Using Waterlines  55-56
    5.4.3 Results and Discussion  56-57
  5.5 Curve-Curve Intersection  57-59
Chapter 6 SHIP HYDROSTATICS AND INITIAL STABILITY  59-66
  6.1 Introduction  59
  6.2 Hydrostatics Curves:Formulation  59-63
  6.3 Bonjean's Curves and Usage  63-66
Chapter 7 LARGE ANGLE STABILITY  66-86
  7.1 Introduction  66
  7.2 Initial and large angle stability:Differences  66-68
  7.3 Mutative Displacement Method  68-71
    7.3.1 Formulation  68-70
    7.3.2 Cross curves of Stability  70-71
  7.4 Equal Displacement Method  71-74
    7.4.1 Basic Formula  71-72
    7.4.2 Waterline Confirmation  72-73
    7.4.3 Pros and Cons of Equal Displacement Method  73-74
  7.5 Characteristics of Statical Stability Curve  74-75
  7.6 Curve of Dynamical Stability  75
  7.7 Stability Levers Calculation:Direct method  75-83
    7.7.1 Procedure  76-83
    7.7.2 Centroid of a 2-D Polygon  83
  7.8 Stability Levers Calculation:Indirect Method  83-86
    7.8.1 Cross Curves Calculation  84-85
    7.8.2 Righting Lever Calculation  85-86
Chapter 8 STABLESHIP WORKING ENVIRONMENT  86-96
  8.1 Introduction  86
  8.2 The Coordinate and Units System  86
  8.3 The Input/Output System  86-87
  8.4 Accuracy Check  87-88
  8.5 Main Modules:Organization  88
  8.6 Input Module:  88-89
  8.7 Surface Generation:  89-91
    8.7.1 Ruled Method:  90
    8.7.2 Cross-Fix Method:  90-91
  8.8 Ship Hydrostatics:  91
  8.9 Bonjean's Curves:  91-92
    8.9.1 Draw Bonjean's Curves:  92
    8.9.2 Bonjean's Curves Usage:Trimmed Ship Calculation  92
  8.10 Ship Large Angle Stability  92-93
  8.11 NURBS Draw  93-94
  8.12 Utilities  94-96
    8.12.1 Plot Waterlines:  94
    8.12.2 Plot Ship Sections  94-95
    8.12.3 Unit Converter  95-96
Chapter 9 VERIFICATION OF THE CODE AND RESULTS  96-108
  9.1 Reference Data:  96-97
    9.1.1 14000 DWT General Cargo Carrier  96-97
    9.1.2 Coastal Escort Vessel  97
  9.2 Hydrostatic and Initial Stability Results  97-102
    9.2.1 Results for Cargo Carrier  97-100
    9.2.2 Results for Escort Vessel  100-102
  9.3 Large Angle Stability Results  102-108
    9.3.1 Results for Cargo Carrier  102-105
    9.3.2 Results for Escort Vessel  105-108
Chapter 10 CONCLUSION AND RECOMMENDATION  108-110
  10.1 Conclusion  108-109
  10.2 Recommendations for Future Work  109-110
References  110-113
Appendix A SAMPLE TEMPLATES  113-115
Appendix B STABLESHIP REPORTS(SAMPLES)  115-118
  B.1 Cross Curve for 70 Deg Heel(Sample)  115-116
  B.2 Righting Lever From Cross Curves(Sample)  116
  B.3 Intact Stability Report:Direct Method(Sample)  116-118

Ship Hull Fitting and Stability Calculation

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