A5046419997- Ship Hydrodynamics and Maneuverability
- Engineering Structural Analysis Methods
- Structural Integrity and Reliability Analysis
- Fatigue and fracture mechanics
- Drilling and Well Engineering
- Oil and Gas Production Techniques
- Mechanical and Thermal Properties Analysis
- Maritime Navigation and Safety
- Offshore Engineering and Technologies
- Structural Analysis of Composite Materials
- Fire effects on concrete materials
- Material Properties and Applications
- Underwater Vehicles and Communication Systems
- Mechanical Engineering Research and Applications
- Mechanical Behavior of Composites
- Fire dynamics and safety research
- Biomimetic flight and propulsion mechanisms
- Structural Analysis and Optimization
- Advanced Surface Polishing Techniques
- Refrigeration and Air Conditioning Technologies
- Aquatic and Environmental Studies
- Parasite Biology and Host Interactions
- Control Systems and Identification
- Aerospace Engineering and Energy Systems
- Structural Load-Bearing Analysis
Portuguese Naval School
2004-2024
University of Lisbon
2023-2024
Brazilian Naval School
2018
Ministério da Defesa Nacional
2016
Marinha Portuguesa
2004-2012
Petrobras (Brazil)
2001-2002
This paper explores the impact of sampling rates during sea trials on estimation hydrodynamic parameters in a nonlinear manoeuvring model. Sea were carried out using an offshore patrol vessel and test data collected. A model is introduced to characterise ship’s motion, truncated least squares support vector machine employed estimate nondimensional coefficients their corresponding uncertainties 25°–25° zigzag test. To assess influence rates, training set resampled offline with 14 ranging from...
Os autores iniciam com este trabalho um estudo sistemático de determinação dos cestóides peixes depositados na Coleção helmintológica do Instituto Oswaldo Cruz. São referidas ou descritas as seguintes espécies e seus hospedeiros: Schizochoerus liguloideus (Diesing, 1850) Nesolecithus janicki Posche, 1922, ambas Arapaima gigas (Cuvier), (piracuru); Gyrocotyle meandrica Herrera, 1946, Callorhynchus callorhynchus (L.), (quimera); Acanthobothrium dasybati Yamaguti, 1934 Pterobothriidae não...
Sensitivity analysis is applied to ship manoeuvring mathematical models as a means of dealing with model uncertainties, and often leads simplifications. A rather standard 3DOF was tuned the available results full-scale trials naval combatant further used reference for sensitivity analysis. The present research based on multiple perturbed simulations turning, zigzag spiral manoeuvres. salient feature study that perturbations were total hydrodynamic forces moments well separately their...
Gas-Influx Events in a Deep Water Exploratory Well: A Field Case History Antonio C.V.M. Lage; Lage Petrobras Search for other works by this author on: This Site Google Scholar Paulo R.C. Silva; Silva Clemente J.C. Gonçalves; Gonçalves Francisco A.T. Borges; Borges Renato B. Mansano; Mansano Roberto M. Imanishi; Imanishi S.B. Martins Paper presented at the IADC/SPE Drilling Conference, Dallas, Texas, February 2002. Number: SPE-74517-MS https://doi.org/10.2118/74517-MS Published: 26 2002...
This paper describes the mathematical model developed to simulate behavior of a BUV, TOBIAS vehicle, which is being at Portuguese Naval Academy as part SABUVIS project. During development hydrodynamic coefficients t he vehicle were estimated, well thrust generated by undulatory motion tail and effects pectoral fins. U sing this model, it possible perform series maneuvers verifying performance BUV function different control parameters.
The reduction of response motion experienced by monohull marine structures through energy dissipation performed passive stabilisers such as bilge keels is an inexpensive system, when compared to the active systems or stabilising fluid tanks. This main reason why, despite obvious advances in and control, are still designed, produced fitted most recent ships other produced. design philosophy roll has been, is, often based on empirical codes that define a standard structural arrangement, which...
The biggest challenge of the aerated fluid drilling technology development was overcome with well in Albacora being drilled semi-submersible platform Petrobras 17 (P17). A previous paper1 described stages before activity: planning, new equipment, rig modifications and all preparation for well.This paper describes operation itself. All important points differences relative to conventional method are highlighted, special emphasis equipment installed at platform: vertical compact separator,...
This paper presents the results of investigations into mechanics and failure modes structural details usually encountered in lightweight marine structures. The analyses are performed using non-linear finite element analysis. stress concentration factors expected fatigue lives as designed built evaluated alternative configurations discussed with aim improving designs for production.
Forming of composite laminates is an effective manufacturing method that improves repeatability, enables tailoring material orientations, and reduces time cost when compared to more labour-intensive alternatives. However, this process often prone defects - leading delays ultimately scrapping expensive parts are traditionally mitigated through resource intensive trial error approaches. The risks the forming can be by using simulation as a tool develop robust window. In order successfully...