Civil MDC

Floating Structures - A Guide for Design and Analysis, Volume 1 By Barltrop, N.D.P. 2

Floating Structures – A Guide for Design and Analysis, Volume 1 By Barltrop, N.D.P.


Vol. 1 ***.

1. Concept selection and basic design principles. Introduction Types of compliant structure Concept selection Design principles and practice Regulations Project strategy Analysis Worldwide floating production platforms API recommended practices The UK regulatory regime.

2. The environment. Environmental data requirements Rules, guidance and recommended practice The world climate Types of environmental data Wind Tides, currents and water levels Waves Extreme value analysis Down-time and operability analysis Long term statistics for fatigue analysis Joint probability of environmental parameters Effects of proximity to land Directionality and seasonality of environmental parameters Data sources Summary of rules, guidance and recommended practice Formulae derived from rules, guidance and recommended practice.

3. Loading. Gravity Steady environmental forces Hydrostatic forces Operational loading Temporary loading Wave loading Slowly varying forces High frequency forces Impulsive loads Vortex shedding Accidental loads Damping Wave theories Linear diffraction analysis (theory) Linear diffraction analysis (practical guidance) Second order analysis Non diffracting potential theory.

4. Statics and stability. Summary Introduction Hydrostatics basic principles Cross curves of stability Destabalising and stabilising effects Down flooding Calculation methods Causes of heeling Wind overturning moment Special cases Three simple approaches to large angle stability evaluation of rolling vessels Typical stability characteristics of floating bodies Hydrostatic stiffness: isolated floating vessels Hydrostatics in structural analyses Stability requirements Damage control Safety case Inclining tests Mobile offshore drilling units, continuous monitoring of GM Influence of stability criteria on the design Limitations of existing criteria and possible future developments Typical values and approximations for ships Sample data for ship-shaped floating production units Sample data for typical semi-submersibles Hydrodynamic properties of a typical semi-submersible Rules for numerical integration Hydrostatic stiffness: facet calculation method.

5. Dynamic response characteristics. Response categories and nomenclature Theoretical background Wave frequency response Low frequency response High frequency response Impulsive response Simplified calculation methods Ship response Semi-submersible/TLP example Spectral analysis examples Frequency domain spectral and time domain methods Design responses.

6. Structural analysis techniques. Introduction Load and mass application Types of analysis Finite element method Analysis of floating structures Calculation of ship hull properties Calculation of stiffener properties.

Vol. 2. 7.

Steel. Metallurgy Design and analysis Material strength Fracture

13 Fatigue Component strength Corrosion Structural management Experience. 8. Concrete. Material description and strength Material performance in a marine environment Composite behaviour Limit state design Practical aspects Experience The future Pre-stress losses Layered method of solution for shells or slabs. 9. Mooring systems. Introduction and chapter overview Mooring line materials Mooring line statics Mooring line dynamics Mooring system statics Mooring system dynamics Combination of line, system statics and dynamics Anchors Single point mooring Thruster assistance Operational issues Properties of typical systems Model tests Guidance, rules, and regulations Experience, historical risk and reliability analysis Derivation of catenary equations Reliability fundamentals Preliminary design for a 12 leg catenary mooring Glossary of SPM terminology. 10. Dynamic positioning. 1. Introduction Thrusters and powering Control systems and control strategies Methods for analysing dynamically positioned vessels DP rules and guidelines Basics of propulsion theory Basics of control system theory. 11. Tether systems for TLPs. Tether systems and their functional requirements Tether make-up Single tether analysis Tether-hull interaction Tether strength properties Installation methods and equipment Prototyping and testing Inspection options Design spiral TLP tether experience Tension beams Effective tension Hydrodynamic loading Modal analysis TLP hydrostatic and weight roll stiffness. 12. Rigid risers. Introduction Riser systems make up Riser analysis Installation and recovery Inspection and maintenance Materials selection.

13. Flexible risers and umbilicals. Introduction Construction Functional requirements The design spiral and development of a specification Local cross section design Flexible riser/umbilical systems Static configuration analysis Dynamic analysis Test specifications Inspection and maintenance and condition monitoring Regulations.

14. Construction. Steel construction Concrete construction Conversion. 15. Examples. Floating Storage Unit (FSU) Semi-submersible.

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