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M.Tech - Offshore Structural Engineering

SEMESTER ELECTIVES

 

No

Subject L

T

P

C

OE5110 Experimental Methods & Measurements 3 0 0 3
OE5300 Dynamics of Floating Bodies 3 0 0 3
OE5320 Nonlinear Problems in Ocean Engineering 3 0 0 3
OE5330 Advanced Marine Structures 3 0 0 3
OE5400 Port and Harbour Structures 3 0 0 3
OE5450 Numerical Techniques in Ocean Hydrodynamics 3 1 0 4
OE5500 FEM applied to Ocean Engineering 3 0 0 3
OE6500 Marine Corrosion & Control 3 0 0 3
OE6960 Wave Simulation Measurement & Analysis 2 0 3 4
PE6090 HSE Management in Petroleum and Offshore
Engineering
3 0 0 3
OE6005 Reliability of Offshore Structures 3 0 0 3

Any other elective approved by Faculty Advisor - IIT Madras.

OE6001 Materials and Fabrication of Offshore Structures  3 0 0 3
COT
 

Structural Steel : Steel manufacturing processes; Tempered and quenched steel; Thermo- Mechanically Controlled Process(TMCP); Low carbon steel, high strength alloys, duplex and super duplex steels; ASTM / API steel products, chemical composition, carbon equivalent, mechanical properties, through thickness requirements, weldability, supplementary requirements, low temperature service, Charpy V-notch test and energy requirements, properties of steel at elevated temperature;

Welding and Fabrication : Rolling and fabrication of tubular and TKY joints, typical jacket fabrication and rollup procedure, American Welding Society (AWS) guidelines, standard prequalified welds, Welding processes; SMAW and FCAW process; full penetration / fillet welds, heat affected zone (HAZ), Welding electrodes; Hydrogen induced cracking; Crack Tip Opening Displacement (CTOD) tests, fabrication tolerances, residual stresses; inspection and quality control requirements; NDT of welds; Ultrasonic tests; Magnetic particle inspection; X-rays methods;

Corrosion and Control : Corrosion Mechanism; Types of corrosion; Seawater corrosion; corrosion allowance, cathodic protection design, impressed current method, sacrificial anodes design, protective coatings, splash zone protection, cathodic protection monitoring system.

Concrete / composites : Underwater concrete, mix design, quick setting compounds, high strength grout, fiber reinforced plastics, special composite materials for under water repairs.

Underwater repair: Underwater welding, repair schemes for tubular members, grouted sleeve connections, stressed – grouted connections for tubular joints.

1

OE6002 Installation of Offshore Structures 3 0 0 3
COT
 

Concepts of offshore installations : Fixed and floating structures; Spars and TLP's; Modular topsides and integrated topsides; deck levels and jacket configurations; Spar and TLP hull arrangements;

Loadout : Fabrication yard, grillage and foundation conditions; Fabrication sequence of Launch jacket, lift jackets, topsides and modules; Weighing and weight control; Skidded, Trailer and lifted Loadout methods;

Transportation : Cargo barges; Launch barges; layout of cargo arrangement; Sea fastening layout and design; Static and dynamic stability of barge; Motion analysis of barge – cargo system; Transportation analysis. Transportation fatigue analysis; Installation Schemes : Lifting and launch schemes for jackets, upending and setting, on bottom stability; Float-over installations; Dynamics of barge – cargo system;

Installation aids : Launch cradle design; Buoyancy tank design; Lift points – padeyes and trunnions; spreader frame and spreader bar concepts; Mudmat concepts and design methods; Lifting topside modules and towers; Bumpers and guides; Grouting and leveling of jackets;

Pile Driving and Monitoring : Pile driveabililty; Pile stickup design; main and skirt piles
concepts; Vertical and batter piles; Dynamics of vertical piles; Pile driving stresses; Pile
driving monitoring system; Pile capacity prediction from driving records.

 

2
OE6003 Analysis of Offshore Structures  3 0 0 3
COT
 

Static Structural Analysis : Introduction to structural modeling and analysis of jacket structures; Static and buckling analysis using matrix methods; formulation; treatment of hydrodynamic loading; Estimation of wave and current loading on framed structures; maximum base shear and overturning methods; Cyclic loads for fatigue analysis; Pile – soil interaction and nonlinear analysis.

Dynamic Structural analysis: Dynamic analysis of framed structures; Mode shapes and Eigen frequency analysis; Wave response; dynamic wave response; frequency and time domain analysis of risers and pipelines.

Spectral Analysis methods: Wave spectral density; Spectra for long term and short term wave loading; cyclic stresses and fatigue analysis; Spectral fatigue analysis; Earthquake loads; Response spectra method; Earthquake analysis.

Ultimate Strength analysis : Introduction to ultimate strength of tubular members; Ship impact and denting of tubular; Collapse analysis jacket structures; Push-over analysis and reserve strength ratio of jacket structures; Analysis of structures subjected to high temperature.

3

 
OE6004 Numerical Modeling of offshore Structures 2 0 3 4
COT
  Introduction to floating structures- Semisubmersible, TLPs, FPSOs, Spars and other examples; General concepts on estimation of loads and Hydrostatic Stability; Elastic plate theory; Plated structures; stiffened plates; Buckling of plates; Semi-submersible; column stabilized structures; design of pontoons; Tension leg platforms; Tethers selection and design; Spar hulls; classic, truss and cell spar; Spar hull compartments and design of shell structures; code compliance; FPSOs; Turret and spread moored units; Risers – types, design aspects; Selection of mooring system for floating structures; design and installation of moorings;

4
OE6004 Numerical Modeling of offshore Structures 2 0 3 4
COT
 

Fixed Structures : Introduction to structural modeling and analysis of jacket structures; Main piled and skirt pile jacket models, In-service analysis for storm wave loads, load-out and launch analysis, sea transportation loads generation and analysis; Seismic analysis fixed offshore structures; Code guidance; Examples problems and case studies, tutorial problems;

Floating Structures :
Static and dynamic stability of floating systems; ABS guidelines; Longitudinal strength calculation; Basics of motion analysis of floating structures; Motion analysis of flat bottom barges, heavy lift vessels and other floating systems such as SPAR, Tension leg platforms and semi-submersible; Generation of Response Amplitude Operators (RAOs); Motion analysis of multi-bodies; Heavy lift vessel and crane lifting system; Case studies and tutorial problems;

Mooring System analysis:
Basics of mooring systems; Slack and catenary mooring systems; Spread mooring system analysis; Turret mooring system analysis; Case studies and tutorial problems.
4

 
OE6006 Design of Floating offshore Structures 3 0 0 3
COT
  Introduction to floating structures- Semisubmersible, TLPs, FPSOs, Spars and other examples; General concepts on estimation of loads and Hydrostatic Stability; Elastic plate theory; Plated structures; stiffened plates; Buckling of plates; Semi-submersible; column stabilized structures; design of pontoons; Tension leg platforms; Tethers selection and design; Spar hulls; classic, truss and cell spar; Spar hull compartments and design of shell structures; code compliance; FPSOs; Turret and spread moored units; Risers – types, design aspects; Selection of mooring system for floating structures; design and installation of moorings;

4

OE6007 Pipeline and Riser Engineering 3 0 0 3
COT
  Introduction to subsea pipelines; Pipeline arrival and discharge conditions; Pipeline hydraulics; Pipeline sizing; Friction loss; Temperature profile; Slug formation and control; Installation of pipelines in shallow and deep water; S and J lay methods; Pipe lay barges and vessels; Pipeline initiation and termination; Pipeline design for stresses in service conditions; Static and dynamic Stability; Pipeline flexibility and span analysis; Cathodic protection design. Rigid and flexible risers; Design and installation of risers; Intelligent pigging; Pipeline corrosion monitoring; Pipeline crossings; Bonded and unbonded flexibles

4
OE5030 Wave Hydrodynamics 3 0 0 3
COT
 

Basic Fluid Mechanics : Conservation of mass and momentum, Euler Equation, Bernoullis equation, potential flow, stream function.

Waves : Classification of water waves - Two dimensional wave equation and wave characteristics - wave theories - Small amplitude waves - Finite amplitude waves - Stokian, Solitary and Conical wave theories - Water particle kinematics - wave energy, power - wave deformation - Reflection, Refraction, Diffraction Breaking of waves - Wave Forecasting Methods - Spectral description of Ocean Waves - Design wave.

Currents : Classification - Behaviour - Design Criteria, Scour and other effects of currents. Forces : Wave forces - Morison equation - wave loads on vertical, inclined and horizontal cylinders. Diffraction theory - wave slamming and slapping - wave impact pressures and forces on Coastal Structures - Breakwaters - Seawalls - Model Experiments.

5

OE6200 Design of Offshore Structures 3 1 0 4
COT
 

Loads on offshore structures
Wind Loads; Wave and Current Loads; Calculation based on Maximum base Shear and Overturning Moments; Design Wave heights and Spectral Definition; Hydrodynamic Coefficients and Marine Growth; Fatigue Load Definition and Joint Probability distribution; Seismic Loads;

Concepts of Fixed Platform Jacket and Deck
Jacket concepts, redundant framing arrangement; Launch and Lift jackets; Simple Deck configurations for Lift and float-over installations; In-service and Pre-service Loads and analysis

Steel Tubular Member Design
Principles of WSD and LRFD; Allowable stresses and Partial Safety Factors; Tubular Members, Slenderness effects; Column Buckling, Design for combined axial and bending stresses (API RP 2A guidelines);

Tubular Joint Design for Static and Cyclic Loads
Simple tubular joints, design using allowable loads; stress concentration factors; S-N curves and fatigue damage calculations

Jackup Rigs
Configuration and operation of jackups; Simplified analysis; Spudcan penetration and extraction; Spudcan – pile interaction; Design of jackup legs;

Design against Accidental Loads (Fire, Blast and Collision)
Behaviour of steel at elevated temperature; Fire Rating for Hydrocarbon fire; Design of structures for high temperature; Blast Mitigation-Blast walls; Collision of Boats and energy absorbtion; Platform survival capacity and Plastic design methods

Example tutorial problems on design of tubular members, Stress concentration factors, fatigue estimation, wave load on structures;

6

 

OE5070 Statics and Dynamics of Marine Vehicles  3 0 0 3
 

Fluid pressure and centre of pressure - estimation of weight and centre of gravity - conditions of equilibrium - definition of meta-centre - hydrostatic particulars - stability at small angles of inclinations - problems of heel and trim-free surface effect - inclining
experiment - stability at large angles - dynamic stability allowable KG - stability criteria - capacity stowage, trim and stability booklet - freeboard - damaged stability.

Oscillations of floating bodies - equations of motion - added mass and moment of inertia, damping coefficients - exciting forces and moments due to waves, effect of forward speed - heave, pitch and roll oscillations - strip theory for ship like forms - prediction of motion in irregular seas - method of model tests.

7
 
OE5110   Experimental Methods and Measurements 3 0 0 3
COT
   

Dimensional Analysis with special reference to Model Studies in Hydrodynamic and coastal Engineering problems. Design of Models and Fabrication. Hydrodynamic test facilities, Wave makers, Wave absorbers 2-D and 3-D Wave generation.

Static and Dynamic load application methods with reference to model and prototype testing transducers and Instrumentation for Measurement of Force, Pressure, Strain, Displacement, Vibration and Flow. Data Acquisition Systems.

Measurement Techniques for Drag and Inertia Forces, Cavitation, Water Entry and Exit
problems.

Wave, Current and Tide Data collection methods

Field Instrumentation for Geotechnical Engineering

Monitoring of Marine Structural Systems, Non Destructive Testing Techniques and
ecaluation.

8
  1
OE5130 Laboratory - I  0 0 3 2
   

Identification and classifications of marine minerals and rocks of the oceanic crust, Tests for determination of geotechnical properties of marine deposits, Marine Geo-physical exploration. Use of various transducers, pickups for static and dynamic measurements in Ocean Structures. Non-destructive testing, Data transmission and analysis using DACS.

9

  1
OE5230  Foundation for Offshore Structures 3 1 0 4
   

Basic Soil Mechanics: Basic soil properties, correlation between engineering parameters, geotechnical investigation, bore log.

Pile foundation: Jacket main piles, skirt piles, driven piles, drilled and grouted piles, steel and concrete piles, axial capacity, point bearing and skin friction, factor of safety, lateral load on piles, p-y, t-z and q-z curves, pile group effect, scour around piles, seabed subsidence and design of piles against seabed movement, negative skin friction, cyclic degradation, main pile to jacket connections, skirt pile to jacket connections, API RP 2A provisions.

Pile Installation: Minimum pile wall thickness, pile handling stresses, static and dynamic stresses, pile stickup, stresses during stick up, wave and current loads, hammer selection, pile driving stresses, wave equation analysis, pile driving fatigue, API RP 2A gidelines Pile Testing: Working load test, ultimate load test, pile monitoring during driving, pile integrity testing, high strain dynamic testing, rebound method.

Special foundations: Mud-mats: bearing capacity, sliding stability, over-turning stability, short term and long term settlements, factor of safety; Bucket foundation; Suction anchors; Gravity foundation.

Example problem and tutorial on axial capacity of piles, lateral capacity and load deflection of laterally load piles; Mudmat bearing capacity; group effect;

10
  1
OE5200 Dynamics of Ocean Structures  3 0 0 3
COT
   

Free and forced vibrations of SDOF systems, time and frequency domain approaches - Formulation of equations of motion, Hamilton's principle, Lagrange equations of motions, continuous and discrete systems - Study of MDOF systems - Rayleigh - Ritz, Stodola and
Holzer methods - Matrix methods for dynamic analysis, Eigen solution - Mode superposition.

Vibrations of structures involving fluid - structure - solid interaction, dynamic behaviour of offshore towers - stochastic dynamics of offshore structures, frequency domain response - Narrow band systems, fatigue predictions - Response to wave, and earthquake loadings.

11

  1
OE5140 Laboratory II 0 0 3 2
    Measurement of regular and random wave. Analysis computation of water particle kinematics. Measurement of reflectivity and Transmissinity. Wave Force measurements on cylinder, simulation of standard wave spetra. Wave current Ė structure interaction studies.


12
  1
OE5300 Dynamics of Floating Bodies 3 0 0 3
   

Equations of motion for SDOF systems, time and frequency domain solutions - oscillations of floating bodies, added mass and moment of inertia, and hydrodynamic damping - Exciting forces and moments due to waves - Strip theory for slender bodies - Symmetric& unsymmetric coupled motions - Effect of forward speed-3D effects - Dynamic effects - Roll and pitch damping devices - probabilistic approach- Introduction to random response theory - Random response of linear systems under wave loading, directional spectra for waves Probabilistic design criteria - General motion analysis of floating bodies, time and frequency
domain approaches.

13

  1
OE5320 Non Linear Problems in Ocean Engineering 3 0 0 3
   

Conservative and nonconservative systems, Quadratic and cubic nonlinearities, Nonlinear damping, Forced oscillations, Sub and Superharmonic responses, Parametrically excited systems, Chaotic motion, System identification.

Nonlinear wave theories and wave loading, Nonlinear models of compliant platforms and soil-structure interaction, Risers and moorings, Nonlinear wave loading on large floating systems, Slow drift oscillation, Random response and statistical analysis.

14
  1
OE5330 Advanced Marine Structures 3 0 0 3
   

Ultimate Load Design, Principles; Factors affecting strength, Ultimate behavior of bars and beams; Plastic capacity of sections, Plastic capacity of beams and frames, Plastic capacity of plates, Influence of membrane forces, Application to ships and offshore structures, Collision problems, Fundamentals of impact analysis, Impact capacities of steel jackets, local and global; Capacities of tubular joints, Column, flexural and torsional buckling, Design.

Structural response to underwater explosion, Design issues.

Fluid Structure interaction, Framed offshore structures, Elements of flow-induced vibration, Vibration of underwater structures; Sound radiation and scattering by structures.

Design of stiffened structures, Reliability design and simulation concepts, FOSM and AFOSM methods, Partial safety factors and code calibration.

Fatigue and Fracture: Fatigue failure, cumulative fatigue damage models, Fracture mechanics approach to fatigue failure, Fatique analysis and design of marine structures.

15

  1
OE5400   Port and Harbour Structures  3 0 0 3
COT
   

Estimation of loads, Analysis, design and construction of Post Structures - Breakwaters, Jetties, Wharves, Quays, Diaphragm Walls, Slipways, Docks. Offshore terminals and islands - fenders and Mooring Facilities.

Limit state and working stress method of design, crack width calculations. Integrity analysis of berthing structures. Case studies of breackwater failures and other types of structures. Partial safety Factors. Codal Requirements.

16

  1
OE5450 Numercial Techniques in Ocean Hydrodynamics 3 0 0 3
   

Introduction to numerical methods: Interpolation, differentiation, integration, systems of linear equations. Revist Fluid Dynamics fundamentals. Solution of differential equations by numerical integration. Introduction to CFD concepts.

Introduction to Numerical Marine Hydrodynamics; Partial differential equations of inviscid hydrodynamics; FD, FE & BI techniques. Application of Fast Fourier Transforms. Numerical representation of sea waves. Computation of the motions of ships in waves. Integral
boundary layer equations and numerical solutions.

Numerical methods in 2D & 3D Ocean Circulation: GFD fundamentals (rotation and stratification); Introduction to 2D & 3D Equations of Motion. Application of CFD concepts to the Equations of Motion. Introduction to Unstructured meshes.

Introduction to Parallel Machines and High Performance Computing.

17

  1
OE5500 FEM Applied to Ocean Engineering  3 0 0 3
COT
   

Introduction - Different approaches to finite element formulation - Different types of elements and interpolation functions, Language & Hermite Polynomials, natural co-ordinates - Derivation of element property matrices - Assembly - solution of finite element equations -
Structural and geotechnical problems - Nonlinear analysis.

Application to fluid mechanics problems, Fluid - structure interaction - Diffraction of waves, 2D formulation using mild - slope equation - use of infinite elements - Added mass and damping matrices for floating bodies, 2D formulation - Harbour resonance, Liquid sloshing - Vibrations of underwater structures - Introduction to Boundary Element Techniques.

18

  1
OE6500   Marine Corrosion and Control  3 0 0 3
COT
   

System involved in marine corrosion, principle and mechanism, different forms of corrosion - The nature and diagnosis of marine corrosion, classification of typical marine environment - factors in corrosion failures (material environment and design) - Environmental factors
influencing the corrosion process (metals and concrete) mathematical modeling for prediction of corrosion rate.

Stress corrosion and corrosion fatigue behaviour of materials in Marine environment - Marine Corrosion testing and monitoring - Material choice - and control of corrosion (cathodic protection). Installation of different types of anodes in offshore platforms. Anticipation painting scheme. Underwater welding - Biofouling.

19

  1
OE6960 Wave simulation, measurement and analysis 2 0 3 4
   

Introduction to random waves – statistical & spectral analysis;

Univariate and multivariate spectral analysis of signals; Hilbert transform; Bi-spectral analysis of nonlinear waves;

Laboratory wave simulation, measurement & analysis; Wave groups, Breaking waves, Stokes 2nd order & Shallow water waves such as Cnoidal and Solitary waves.

Wavelet transforms and principal component analysis.

Multi-Directional waves – simulation and analysis using Fourier Method, MLM & MEM– single point measurement and array of gauges; Reflection, refraction and diffraction of directional waves.

Data buoys types – directional wave measurement.

Radar – LIDAR & SAR techniques of directional wave measurement.

Wave Modelling: Third generation Wind-Wave modeling for wave hind-casting and forecasting.

Nearshore wave propagation in phase-averaging and phase-resolving modes using industry

Softwares; Wave tracing; Computational evaluation of diffracted wave on large bodies using
industry software; Boussinesq approximation.

20

  1
PE6090  HSE Management in Petroleum and Offshore Engineering  3 0 0 3
   

Introduction to safety, health and environmental management – Basic terms and their definitions – Importance of safety – safety assurance and assessment – safety in design and operation – organizing for safety

Hazard classification and assessment – hazard evaluation and hazard control

Environmental issues and Management – atmospheric pollution – flaring and fugitive release – water pollution – drilling waste, produced water, oil spills, cooling water, processed water – soil waste – rock cutting, oil sludge, drilling soil waste, production waste – Environmental monitoring – environmental impact and decommissioning – environmental management

Accidents modeling – release modeling – fire and explosion modeling – toxic release and dispersion modeling – accident investigation and reporting – concepts of HAZOP and PHA

Safety measures in design and process operations – inerting, explosion, fire prevention, sprinkler systems

Risk assessment and management – Risk picture – definition and characteristics – risk acceptance criteria – quantified risk assessment – hazard assessment – fatality risk assessment – Marine systems risk modeling – risk management principles and methods and concepts optimization for offshore petroleum industry

Analysis of case studies from offshore and petroleum industry

 

21

   


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