MSc in Oil & Gas and Offshore Engineering

Course Information Package

Course Unit TitleSTRUCTURAL DYNAMICS AND DESIGN PRINCIPLES OF OFFSHORE STRUCTURES
Course Unit CodeMOE510
Course Unit DetailsMSc Oil & Gas and Offshore Engineering (Required Courses) -
Number of ECTS credits allocated7
Learning Outcomes of the course unitBy the end of the course, the students should be able to:
  1. Carry out structural dynamic analysis of discrete multi – degrees systems under periodic, impulsive and stochastic excitation.
  2. Carry out dynamic response analysis of 1D continuous systems.
  3. Assess the structural dynamic response of simple fixed offshore structures under regular and irregular wave excitation.
  4. Carry out simplified fatigue strength analysis of structural components and evaluate their fatigue life cycle.
Mode of DeliveryFace-to-face
PrerequisitesNONECo-requisitesNONE
Recommended optional program componentsNONE
Course Contents

Module A - Basic features of dynamic loading and response

·       Structural dynamic response of single- andmulti- degrees of freedom systems.

·       Equations of motions of the free- and forcedvibrations under periodic, impulsive and stochastic excitation.

·       Statistical properties of the response.

 

Module B - Dynamic analysis of continuous Systems.

·       Continuous systems; equations of motion forbeam in bending, beam in shear, rod in axial motion, rod in torsion and tautcable.

·       Free vibrations of 1D continuous system: themethod of separation of variables, natural frequencies and normal modes.

·       Forced vibrations of 1D continuous systems:Modal Analysis, Fourier analysis, the steady-state response to a harmonic load.

·       Discretization of continuous systems.

·       Use of FEM for the structural vibrationscalculations of continuous systems.

 

Module C -  Calculation of the dynamic response of typical structures

·       Morison-type loading for flexible elements.

·       Piles with or without end mass.

·       Jacket platforms.

 

Module D - Fatigue strength models

·       Deterministic and stochastic modeling.

·       Dimensioning of offshore structures on thebasis of operational strength.

·       Evaluation of offshore structures fatiguelife cycle.

·       Design for safety.

·       Test cases.

 

Module E - Introduction to vortex induced vibrations

·       Vortex shedding from stationary and movingcylinders.

·      Response of flexibly mounted cylinders andflexible structures to vortex shedding.

Recommended and/or required reading:
Textbooks
  • R.D. Cook et. Al: “Concepts and Applications of Finite Element Analysis”, Wiley, New York, 2002,
  • Violet Li, Advanced Offshore Engineering, Bentham Press, Offshore Engineering Handbook Series, London, 1994,
  • M.G. Hallam, N.J. Heaf, L.R. Wootton: “Dynamics of Marine Structures: Methods of Calculating the Dynamic Response of Fixed Structures subject to Wave and Current Action”, Ciria Underwater Engineering Group, London, 1978
  • R.D. Blevins: “Flow-Induced Vibrations”, Van Nostrand Reinhold, 1990.
  • R.D. Blevins: “Applied Fluid Dynamics Handbook”, Krieger Pub. 2003.
References
    Planned learning activities and teaching methodsThe taught part ofcourse is delivered to the students by means of lectures, conducted with thehelp of computer presentations. Lecture notes and presentations will beavailable through the web for students to use in combination with thetextbooks. Lectures will be supplemented with homework assignments to developknowledge and computational skills on the various modulus of the course(dynamic analysis of discrete multi-degrees systems, 1D continuous systems,simple fixed offshore structures, fatigue life-cycle analysis).
    Assessment methods and criteria
    Assignments15%
    Tests15%
    Readings10%
    Final Exam60%
    Language of instructionEnglish
    Work placement(s)NO