A5103062159- Structural Integrity and Reliability Analysis
- Ship Hydrodynamics and Maneuverability
- Fatigue and fracture mechanics
- Maritime Transport Emissions and Efficiency
- Fluid Dynamics Simulations and Interactions
- Concrete Corrosion and Durability
- Structural Health Monitoring Techniques
- Maritime Navigation and Safety
- Engineering Structural Analysis Methods
- Vehicle emissions and performance
- Fault Detection and Control Systems
- Laser and Thermal Forming Techniques
- Advanced Combustion Engine Technologies
- Corrosion Behavior and Inhibition
- Metal Forming Simulation Techniques
- Non-Destructive Testing Techniques
University of Duisburg-Essen
2023-2024
University of Rostock
2022
Two methods were compared to predict a ship’s fuel consumption: the simplified naval architecture method (SNAM) and deep neural network (DNN) method. The SNAM relied on limited operational data employed technique estimate required power by determining its resistance in calm water. Here, Holtrop–Mennen obtained hydrostatic information for each selected voyage, added encountered natural seaways, brake scenario. Additional characteristics, such as efficiency factors, derived from literature...
The authors proposed a direct comparison between white- and black-box models to predict the engine brake power of 15,000 TEU (twenty-foot equivalent unit) containership. A Simplified Naval Architecture Method (SNAM), based on limited operational data, was highly enhanced by including specific parameters. An OAT (one-at-a-time) sensitivity analysis performed recognize influences most relevant parameters in white-box model. method relied DNN (deep neural network) composed two fully connected...
The shipping industry plays a crucial role in global trade, but it also contributes significantly to environmental pollution, particularly regard carbon emissions. Carbon Intensity Indicator (CII) was introduced with the objective of reducing emissions sector. lack familiarity performance is common issue among vessel operator. To address this aspect, development methods that can accurately predict CII for ships paramount importance. This paper presents novel and simplified approach...
Abstract The Idealized Structural Unit Method (ISUM) is applied to perform progressive collapse analyses for a 1/3-scaled frigate model in bending. For the load case of pure vertical bending (sagging), ISUM results are validated against experimental data. explained detail taking into account initial imperfections stiffeners and attached plating. In particular, effect welding residual stresses on ultimate hull girder strength discussed. Displacement controlled nonlinear performed by using...
The main purpose of this study is to apply a Deep Neural Network (DNN) method linear systems and predict in relatively short time span the ultimate vertical bending moment (VBM) for damaged ships. A approach, which composed multiple fully connected layers with Rectified Linear Unit (ReLU) non-linear activation function, has been applied more than 6000 samples validated using leave-one-out technique. strength predicted set completely new damage scenarios different cross sections, enhancing...
An advanced salvage method is proposed for damaged ships to ensure a short-term decision-making process safe ocean towage the repair yard. The residual longitudinal strength must be greater than sum of still water and maximum vertical wave bending moment. ultimate moment determined numerically container vessel by using an incremental iterative approach (Smith method) wave-induced loads are predicted means hydrodynamic analyses. Successful applicability demonstrated vessel, which was towed...
Abstract Displacement controlled nonlinear finite element analyses are performed to determine the ultimate strength of three different vessel types in vertical bending. Parametric models proposed for a bulk carrier, double hull VLCC and container vessel. The influence model parameters on collapse behavior is shown sagging hogging condition. initial imperfections stiffeners attached plating due welding taken into account. results validated all ships against Smith’s method. An inhouse code has...
Abstract Nonlinear finite element analyses are performed to determine the ultimate strength of a double hull VLCC under pure vertical, horizontal and biaxial bending. A parametric model is developed influence nonlinear material behavior, mesh size length on girder demonstrated exemplarily for hogging sagging conditions. An appropriate parameter configuration with respect numerical efforts accuracy used perform static implicit bending load cases. Convergence reached by using full...