A5044901360- Ship Hydrodynamics and Maneuverability
- Maritime Transport Emissions and Efficiency
- Structural Integrity and Reliability Analysis
- Fluid Dynamics Simulations and Interactions
- Wave and Wind Energy Systems
- Probabilistic and Robust Engineering Design
- Engineering Applied Research
- Spacecraft and Cryogenic Technologies
- Risk and Safety Analysis
- Wind and Air Flow Studies
- Computational Fluid Dynamics and Aerodynamics
- Maritime Navigation and Safety
- Fire dynamics and safety research
- Hydraulic and Pneumatic Systems
- Ocean Waves and Remote Sensing
- Combustion and Detonation Processes
- Gas Dynamics and Kinetic Theory
- Structural Health Monitoring Techniques
- Target Tracking and Data Fusion in Sensor Networks
- Bayesian Modeling and Causal Inference
- Maritime Ports and Logistics
- Mechanical stress and fatigue analysis
- Evacuation and Crowd Dynamics
- Flame retardant materials and properties
- Heat Transfer and Numerical Methods
DNV (Norway)
2015-2024
DNV (Germany)
2014-2023
University of Strathclyde
2002-2005
Hamburgische Schiffbau-Versuchsanstalt (Germany)
2003
AbstractDuisburg Test Case (DTC) is a hull design of typical 14000 TEU container ship, developed at the Institute Ship Technology, Ocean Engineering and Transport Systems (ISMT) for benchmarking validation numerical methods. Hull geometry model test results resistance, propulsion roll damping are publicly available. The paper presents existing data from tests computations.Keywords: Container ShipResistanceSeakeepingView correction statement:Corrigendum
A new Rankine panel method and an extended Reynolds-Averaged Navier–Stokes (RANS) solver were employed to predict added resistance in head waves at different Froude numbers of a Wigley hull, large tanker, modern containership. The frequency domain method, using sources as basic flow potentials, accounts for the interaction linear periodic wave-induced with nonlinear steady caused by ship's forward speed calm water, including free surface conditions dynamic squat. Added is obtained pressure...
The 2012 guidelines on the method of calculation attained Energy Efficiency Design Index (EEDI) for new ships, MEPC.212(63), as updated by MEPC 245(66) in April 2014, represent a major step forward implementing energy efficiency regulations ships through introduction EEDI limits various types ships. There are, however, serious concerns regarding sufficiency propulsion power and steering devices to maintain manoeuvrability adverse conditions, hence safety if requirements are achieved simply...
This paper discusses ways to embed time-domain field methods in extreme value predictions. Approaches are suggested that appear give most reliable results. They rely on Monte-Carlo simulations, a reduction of parameter variations and extrapolation exceedance rates over significant wave height. The computational effort is large, yet it can be handled with modern cluster computers.
Added resistance of ships in waves is determined by a newly developed potential flow method, Rankine source strip and RANS (Reynolds-averaged Navier-Stokes) equations solvers. For 10 ships, results all these methods are compared with each other, published computed experimental results, approximation formulae submitted to IMO (International Maritime Organisation). The focus on that short relative ship length. In spite the large scatter existing prediction appear useful for practical application.
The 2012 guidelines on the method of calculation attained Energy Efficiency Design Index (EEDI) for new ships, MEPC.212(63), represent a major step forward in implementing energy efficiency regulations MEPC.203(62), through introduction specifications calculating various types ships. There are, however, concerns regarding sufficiency propulsion power and steering devices to maintain manoeuvrability ships adverse conditions, hence safety if requirements are achieved by simply reducing...
A benchmarking study is carried out concerning wave-induced ship motions in shallow water, predicted with commercially available codes AQWA, GL Rankine, MOSES, OCTOPUS, PDStrip and WAMIT. Comparison made experiments for three cargo models tested at Flanders Hydraulics Research. The same IGES of the hulls were used all to ensure consistent representation model geometry. comparisons may be assess suitability each code zero-speed applications such as berthed under-keel clearance, well...
Ship-specific operational guidance onboard container carriers can assist the ship master to avoid excessive motions and accelerations thus prevent loss damage of cargo. The paper outlines considerations regarding such guidance, particularly relevant factors for cargo damage, conditions roll in waves, probabilistic criteria standards, numerical methods methodology simulations. Examples are shown a modern ship.
Model tests are usually used for the traditional seakeeping predictions (transfer functions of ship motions and loads in regular waves). Experience shows that numerical solution Reynolds-averaged Navier-Stokes equations (RANSE) can provide accurate results this task, however, such computations require too much computational time required large number loading conditions, speeds wave directions periods. Traditionally, potential flow methods at early design stages. Although produce very quickly...
A Rankine source method is extended and applied to ship–ship interaction problems. The covers the nonlinear steady flow linear seakeeping in frequency domain. solution accounts for free-surface conditions, ship wave, dynamic trim sinkage. Periodic due waves linearized with respect wave amplitude, taking into account interactions following Hachmann approach, which considers perturbation potential as constant body-fixed reference frame. This advantageous prediction of motions at moderate high...
The 2012 guidelines on the method of calculation attained Energy Efficiency Design Index (EEDI) for new ships, MEPC.212(63), as updated by MEPC 245(66) in April 2014, represent a major step forward implementing energy efficiency regulations ships through introduction EEDI limits various types ships. There are, however, serious concerns regarding sufficiency propulsion power and steering devices to maintain maneuverability adverse conditions, hence safety if requirements are achieved simply...
This article describes the development of a non-linear time-domain boundary element method to determine ship responses (motions and loads) in waves. The general approach by Cummins was used express equation motion time domain. Hydrodynamic forces were split into inertia, radiation, diffraction, Froude–Krylov restoring components. Radiation determined domain convolution impulse response with velocity. computed over instantaneous wetted surface, taking account motions, undisturbed wave...
For a representative large modern containership, the effects of deck container arrangement on wind-induced loads were systematically investigated using physical model tests and numerical computations. Numerical simulations based various turbulence models performed to validate our predictions against comparative wind tunnel measurements. Not only standard two-equation unsteady Reynolds-Averaged Navier–Stokes (URANS) equations solver but also improved delayed detached eddy simulation (IDDES)...
Method rolls was developed to simulate non-linear roll motions of ships. The method described already by Kröger in 1986 , however German language. Because the is used frequently even now, this paper documents English, including developments made meantime, but excluding extension damaged
A new Rankine panel method and an extended RANS solver were employed to predict added resistance in head waves at different Froude numbers of a Wigley hull, large tanker, modern containership. The frequency domain method, using sources as basic flow potentials, accounts for the interaction linear periodic wave-induced with nonlinear steady caused by ship’s forward speed calm water, including free surface conditions dynamic squat. Added is obtained pressure integration method. time solver,...
A linear boundary-element method and a Reynolds-averaged Navier-Stokes (RANS) equations solver were combined to predict maximum green water loads on typical cruise ship of medium size. For structural analysis, one-way coupling mapped the hydrodynamic pressure from finite-volume grid onto computational dynamics finite element mesh. First, long-term responses determined by boundary with statistics based spectral methods; transfer functions these used define response-conditioned wave trains...
In the design of articulated systems, accurate prediction loads on mechanical couplings is important for dimensioning coupling, as well an assessment local and global structural loads. The paper studies a twofold pushing convoy in shallow water. Several numerical approaches articulation are compared with each other model tests. Kinematic constraints applied to couple bodies at points hinge rigid couplings. For comparison, contact elements also used simulate hinges. Depending computations...