Syllabus

Module 1: Types of offshore structures and conceptual development - Analytical models for jacket structures - Materials and their behaviour under static and dynamic loads - Statutory regulations. (6 Hours)

Module 2: Allowable stresses - Various design methods and Code Provisions - Design specification of API, DNV, Lloyd's and other classification societies - Construction of jacket and gravity platforms. (6 Hours)

Module 3: Operational loads - Environmental loads due to wind, wave, current and buoyancy - Morison's Equation - Maximum wave force on offshore structure - Concept of Return waves. (6 Hours)

Module 4: Principles of Static and dynamic analyses of fixed platforms - Use of approximate methods - Design of structural elements. (6 Hours)

Module 5: Introduction to tubular joints - Possible modes of failure - Eccentric connections and offset connections - Cylindrical and rectangular structural members - In-plane and multi-plane connections - Parameters of in-plane tubular joints - Kuang's formulae - Elastic stress distribution - Punching shear Stress - Overlapping braces - Stress concentration - Chord collapse and ring stiffener spacing - Stiffened tubes - External hydrostatic pressure - Fatigue of tubular joints - Fatigue behaviour - S-N curves - Palmgren-Miner cumulative damage rule - Design of tubular joints as per API Code. (6 Hours)

Module 6: Corrosion - Corrosion mechanism - Types of corrosion - Offshore structure corrosion zones – Biological corrosion - Preventive measures of Corrosion - Principles of cathode protection systems - Sacrificial anode method and impressed current method – Online corrosion monitoring - Corrosion fatigue. (6 Hours)

Develop fundamental knowledge of offshore structural systems, including fixed and floating platforms.

Equip students with the ability to analyze environmental loads such as wind, waves, currents, and buoyancy on offshore structures.

Provide hands-on experience in designing and dimensioning structural elements, connections, and joints in compliance with API, DNV, and other industry standards.

Introduce students to corrosion mechanisms, fatigue analysis, and preventive measures to ensure offshore structural integrity and durability.

(1) Analyze and evaluate different types of offshore structures based on functional, operational, and safety requirements.
(2) Assess environmental loads and apply relevant theories such as Morison’s equation for wave forces and return wave concepts.
(3) Perform structural design and stability checks for jacket structures, gravity platforms, and tubular connections.
(4) Apply fatigue analysis methods using S-N curves and cumulative damage rules to ensure offshore structural durability.
(5) Implement corrosion protection strategies including cathodic protection systems and online corrosion monitoring to enhance offshore structure lifespan.

T. H. Dawson, Offshore Structural Engineering, Prentice Hall

W. J. Graff, Introduction to Offshore Structures, Gulf Publ. Co.

B. McClelland, M. D. Reifel, Planning & Design of fixed Offshore Platforms, Van Nostrand

API RP 2A, Planning, Designing and Constructing Fixed Offshore Platforms, API