Part A; lectures on:
Fluid-Structure Interactions
• Introduction to hydroelasticity theory.
• Dynamics of flexible beamlike structure in vacuo.
• Principal modes and natural frequencies.
• Hydroelastic approach to still water problem.
• Hydrodynamics of regular waves
• Strip theory, boundary value problems.
• Fluid actions in equilibrium axes.
• Hydrodynamic coefficients
• Generalized equation of motion in seaway.
• Responses (bodily motions -seakeeping, distortions, bending moments, stresses) in waves.
• Random seas and responses in random seas.
• Criteria for comparing floating vessel forms - slamming, deck wetness, etc..
Part B; lectures on:
Structural Integrity
• The rational structural design of floating vessels:
- Levels of structural design processes
- Limit state design including ultimate and fatigue limits and load effects
• Fatigue of floating vessel structures:
- Basic concepts of fatigue, fatigue damage mechanisms, S-N methodology, local strain methodology
- Life time load determination, wave induced loads, stochastic combination of loads
- Load effect determination, FEA approaches and choices of elements, meshing, structural details
- Fatigue assessments, voyage simulation behaviour, long term fatigue damage
• Fracture modelling in ship and offshore structures:
- Fundamental concepts - energy-based and stress intensity based approaches
- LEFM, modes of crack extension, useful K solutions, fracture testing, life modelling
The integrations of Parts A (worth 65%) and B (worth 35%) will take place through two group assignments.
Wave-induced Loads Assignment (65%);
where the students perform predict wave-induced loads on a real floating vessel using quasi-static and coupled hydroelastic analyses and understand how flexible models can be used for experimentatal validation.
Ship Fatigue Life Assignment (35%);
where the students analyse stress records (measured or predicted) of a real floating vessel in order to predict the fatigue life of a structural detail.
