Compliant Offshore Structures - 1st Edition - ISBN: 9780750610704, 9781483163321

Compliant Offshore Structures

1st Edition

Authors: Minoo H Patel Joel A Witz
eBook ISBN: 9781483163321
Imprint: Butterworth-Heinemann
Published Date: 27th May 1991
Page Count: 422
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Compliant Offshore Structures deals with some aspects of the mechanics of compliant offshore structures. Analysis methods for determining the hydrostatic and hydrodynamic behavior, at wave frequencies only, of conventional and novel compliant structure types are described. The contribution of hull configuration for tandem hull vessels and of pneumatic compliances for ship shape and semi-submersible vessels is also emphasized.

Comprised of 11 chapters, this book begins with an overview of the various conventional and emerging methods of hydrostatic and hydrodynamic analysis that are available for characterizing compliant marine structures. The response of compliant structures to ocean waves is given emphasis, along with the hydrostatic stability of a compliant vessel. The discussion then turns to the use of analysis methods for a variety of conventional and novel compliant structures such as semi-submersibles, ship forms, tensioned buoyant platforms, crane vessels, and vertical marine risers. However, those compliant structures that are believed to have a future application or, alternatively, are useful in illustrating an interesting performance feature are also considered. Among such structures are those with articulated joints, pneumatic compliances, and tandem hull marine vehicles.

This monograph is intended for practicing engineers as well as undergraduate and postgraduate students.

Table of Contents


1 Introduction

1.1 Historical Development

1.2 Types of Structures

1.3 General Analysis and Design Requirements

2 Ocean Wave Excitation

2.1 Ocean Waves as a Random Process

2.2 Short Term Wave Statistics

2.3 Wave Spectra

2.4 Long Term Wave Statistics

2.5 Wind and Current

2.6 Application of Environmental Spectra

3 Hydrostatic Analysis

3.1 Theoretical Background to Pressure Integration Technique for Hydrostatic Analysis

3.2 Classical Hydrostatics

3.3 Pressure Integration Technique

4 Dynamic Response Analysis

4.1 Formulation of Governing Equations

4.2 Solution Techniques

5 Semisubmersible and Ship Forms

5.1 Introduction

5.2 Morison Equation Based Analysis

5.3 Diffraction Analysis

5.4 Monohull Roll Response

5.5 Design Considerations and Operability

5.6 Concluding Remarks

6 Tensioned Buoyant Platforms

6.1 Introduction

6.2 Platform Dynamics

6.3 Tether Dynamics

6.4 Coupling Between Platform and Tether Dynamics

6.5 Model Tests

6.6 Mathieu Instability

7 Dynamics of Crane Vessels

7.1 Introduction

7.2 Rigid vessel Wave Induced Forces and Motions

7.3 Coupled Motions of Vessel and Crane Load

7.4 Operability Limits

7.5 Transient Line Tension at Lift-Off

8 Tandem Hull Floating Vessels

8.1 Introduction

8.2 Hybrid Hull Characteristics

8.3 Simplified Wave Induced Motions Analysis

8.4 Dynamic Analysis of Tandem Hulls

8.5 Design Considerations

9 Articulated Structures

9.1 Introduction

9.2 Design Criteria

9.3 Classical Hydrostatics

9.4 Catastrophic Instability at Large Angles

9.5 Hydrodynamic Response

9.6 Rigid Vessels with Inflected Righting Moment Curves

10 Floating Vessels with Trapped Air Cavities

10.1 General Considerations

10.2 Hydrostatic Analysis

10.3 Semisubmersible Vessels

10.4 Tensioned Buoyant Platforms

10.5 Ship Shape Hull Forms

10.6 Active Control of Trapped Air Volumes

11 Vertical Marine Risers

11.1 Introduction

11.2 Governing Equations

11.3 Methods of Analysis

11.4 Vortex Shedding Effects

11.5 Design Considerations

Appendix Results of Linear Wave Theory



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© Butterworth-Heinemann 1991
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About the Author

Minoo H Patel

Joel A Witz

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