Research at the Ocean Structures Nucleus Research at the Ocean - PowerPoint PPT Presentation

China- Brazil Forum for Subsea Technology Research at the Ocean Structure´s Nucleus Research at the Ocean Structure´s Nucleus Murilo A. Vaz Rio de Janeiro 18 May 2016

Ocean Structure’s Nucleus (Laboratory ) Coordination: Prof. Murilo A. Vaz Mission: To develop tests, analytical and numerical models for design and structural analysis of ocean structures: flexible risers, pipelines, umbilical cables, ship panels, drilling systems and ocean structures. 2

RESEARCH AREAS: Structural Mechanics • Flexible Pipes and umbilical cables • Bend stiffeners and end fittings • Pipelines, risers and marine cables • Drilling systems • Ship panels • Structure Integrity • ≈ 30 undergraduate & graduate students 3

Horizontal Rig Tension: 100 ton. Bending: 40 ton.m. Angles: ± 15 ° . Sample: 9 m. Variable frequency. “Non-conventional” Tests 4

Vertical Rig Tension: 225 ton . Bending: 200 ton.m. Angles: -15 +30 ° . Sample: 12 m. Variable frequency. 5

Dynamic Bending-Compression Test Laboratory infrastructure to perform lateral instability tests 6

New Horizontal Rig • Tension: 500 tonf. 7 • Bending: 200 tonf.m.

Universal Test Frame Load capacity: 2500 kN. 8

Flexible Pipes and Umbilical Cables • Non-linear axi-symmetric analysis. • Numerical simulation (ABAQUS) and analytical modelling of lateral and radial (birdcage) instability of armour wires. • Axi-symmetric viscoelastic analysis (axial damping). • Fatigue analysis methodology. • Integrity of thermoplastic materials. 9

Bend Stiffeners • Non-linear analysis (analytical and FE modelling). Hyper-elastic asymmetric, non-linear viscoelastic material. Thermo-viscoelasticity: self-heating 10

Pipelines and marine cables • Thermo-mechanical buckling. Buckling initiation: sleepers and buoy modules. • Pipe-in-Pipe buckling. • Marine cable mechanics. 11

Drilling systems • Dynamic analysis of vertical risers. • Underbalanced drilling: concentric casing and riser. • Fall of marine risers. • Static coupled analysis of riser-drill string: contact and wear. • Buckling and vibration of drill strings. Analise Dinamica de Queda - 1000m - 9 ppg 300 300 Offset 1 % 2 % 200 3 % 4 % 5 % 6 % Desvio para o Leste (m) 100 0 -100 -200 -300 12 -100 -80 -60 -40 -20 0 20 40 60 80 100 Desvio para o Norte (m)

Ship Structures • Buckling of corroded ship panels. • Structure behaviour in fire. • • Ship collision and grounding. Ship collision and grounding. • Thermomechanical analysis of welded plates. • In-line heating. 13

THANK YOU! murilo@oceanica.ufrj.br www.oceanica.ufrj.br 14