CE3045 Offshore Structures Syllabus:

CE3045 Offshore Structures Syllabus – Anna University Regulation 2021

COURSE OBJECTIVE:

 Students mainly focused in understanding the offshore environment, types, suitability, and design concepts of offshore structures as per the appropriate requirements.

UNIT I INTRODUCTION TO OFFSHORE ENVIRONMENT

Ocean winds-characterization of wind regime-wind velocity profile, Ocean waves-wave parameters Introduction to Airy’s wave theory and its applications-brief about time and frequency domain analysis, brief introduction about ocean currents-tides, seaquakes, Ice environment, Ice-sea interactions.

UNIT II TYPES OF OFFSHORE STRUCTURES

Offshore Structures-need for offshore structures.Types of Offshore Structures -components – materials used-design parameters-suitable environment conditions –construction practices – drawbacks – EIA for Offshore structures.

UNIT III FORCES ON OFFSHORE STRUCTURES

Introduction-Permanent loads-operating loads. Environmental forces-wind force-wave force-current force-seaquake force-Ice force. Force due to tides – Marine growth – Use of API RP 2A guidelines.

UNIT IV SUBMARINE PIPELINES AND RISERS

Pipeline elements-types of pipelines-laying method-materials. Pipe wall thickness verification. Pipeline stability. Design using DNV 81 code.

UNIT V ACCIDENTAL LOADS AND CORROSION

Fire, Blast and Collision- Behaviour of steel at elevated temperature- Fire rating for Hydrocarbon fire, Blast Mitigation-Blast walls- Collision of boats and energy absorption – Corrosion- Corrosion mechanism- Types of corrosion- Offshore structure corrosion zones- Biological corrosionPreventive measures of corrosion- Online corrosion monitoring- Corrosion fatigue

TOTAL: 45 PERIODS
COURSE OUTCOMES:

• On completion of the course, the student is expected to be able to
CO1 Understand the offshore environment and technical terms associated with it.
CO2 Explain the types and choose suitable offshore structures according to environmental conditions
CO3 Investigate various types of forces acting on the offshore structures
CO4 Adapt appropriate codes to design the submarine pipelines
CO5 Discuss about the accidental loads and corrosion on offshore structures

REFERENCES:

1. Graff, W. J., Introduction to Offshore Structures, Gulf Publ. Co.1981.
2. Dawson, T. H., Offshore Structural Engineering, Prentice Hall, 1983.
3. B.C Gerwick, Jr. Construction of Marine and Offshore Structures, CRC Press, Florida, 2000.
4. Clauss, G, Lehmann, E &Ostergaard, C, Offshore Structures, Vol. 1 & 2, Springer-Verlag, 1992.
5. Reddy, D. V and Arockiasamy, M., Offshore Structures Vol.1 & 2, Kreiger Publ. Co.1991.
6. Morgan, N., Marine Technology Reference Book, Butterworths, 1990.
7. McClelland, B and Reifel, M. D., Planning and Design of fixed Offshore Platforms, Van Nostrand, 1986.
8. DNV-RP-B101-Corrosion Protection of Floating Protection and Storage Units, 2007.
9. API RP 2A. Planning, Designing and Constructing Fixed Offshore Platforms, API. 2000.