News and Projects
Pre- & Post-processor - Hydrodynamic Analysis Solver
The pre- and post-processor uses an application programming interface (API) already prepared for a hydrodynamic analysis solver. The pre-processor is used to create and prepare input to the hydrodynamic solver, such as model geometry, loads, and analysis parameters. The post-processor is used to retrieve results from the hydrodynamic solver, such as display and review the results.
The pre-processor serves a model from project source data, such that a data interface is realized between the analysis solver software and model source data. The pre-processor provides the ability to control creation of the input model which also demand the ability to modify the model to ensure that the final model will produce the results as intended. In setting up a model for analysis, automation or knowledge capture is used for repetitive sets of work that would be laborious to complete.
Important for a fast analysis turnaround is the ability of the postprocessor to process the data and support the user in getting the necessary information to understand the model’s hydrodynamic behaviour. The post-processor allows full control of results selection and a set of tools to manage and display results. This also includes easy comprehension of data supported by tools that provides the ability to easily view appropriate results quantities on all model objects. The usability of the interface is supported by commonly used interface types that are well integrated in the windows environment where one important feature is the interaction and data transfer with third party software products such as Word and Excel. Customization is supported by the ability to tailor the user interface to user needs and allow commonly used tools and functions to be reached easily while de-emphasizing seldom used features. These challenges are managed by built-in toolkits and customization capabilities of the programming interface (API) and macro programming capabilities.
The pre- and postprocessor is an important contribution on technically challenging projects. It supports the export of the analysis solver input files and the import of solver results files and is able to automate time-consuming tasks.
JG Maritime Engineering Ltd. was attending OTC2014 in Houston, Tx
Wave Energy Converter (WEC) - Formulation of Numerical Method to Predict Fluid-Structure Interaction and Wave Energy Potential
Jóannes Gullaksen, JG Maritime Engineering Ltd
Cost of energy is a critical factor to the success of Wave Energy Converters (WEC), in order for wave energy converters to compete with other forms of renewable and fossil-fuelled power generation. Essentially, the energy converted into electricity by a WEC is a function of the resource the converter is placed in, the converter's prime mover, and the converter's power take-off system. This is a dynamic system and changes to one aspect can have a significant influence on another.
Kinematics and kinetics are fundamental in fluid-structure interaction and design for optimizing wave energy capture performance, as well as loadings for mooring and structural analysis. The following analysis domains are covered in this paper: 1) physical description of variables affecting wave energy capture performance 2) the kinematics of wave energy converter motion, i.e. the geometrical aspects of motion (variables, reference frames and transformations, 3) the kinetics of wave energy converter motion, i.e. the study of the forces acting on the wave energy converter and the motion they produce, 4) combining the wave energy converter kinematics and kinetics to obtain a dynamic model and 5) description of numerical solution method.
The paper presents the mathematical formulation with numerical method which can be used together with laboratory testing of a WEC. The combination of numerical computations and laboratory testing can be used to produce results to predict how the WEC responds to real wave conditions.
Floatability / Risk Assessment Project
Floatability / Risk Assessment According to IMO Circular MSC.1/Circ.1380
This project is considering the impact of open watertight doors on the vessel operation and survivability when determining whether a
watertight door may remain open during navigation under SOLAS regulation II-1/22 (paragraph 4) (previous SOLAS regulation II-1/15, paragraph 9.3).
The floatability assessment is for the purpose of determining the impact of open watertight doors on ship survivability under SOLAS
regulation II-1/22.4 (previous SOLAS regulation II-1/15.9.3). The project scope is to cover relevant requirements in the
IMO Circular MSC.1/Circ.1380 “Guidance for watertight doors on passenger ships which may be opened during navigation”.
The project also cover intact and damage stability information booklets and updates to damage control and watertight integrity plans.
Calculations are carried out using the software program “AutoHydro-Pro” version 6.5.0. Read more
Wave Energy Converter and Energy Capture Performance
Cost of energy is a critical factor to the success of wave energy converters, in order for wave energy converters to compete with other forms of renewable and fossil-fuelled power generation.
The key factors affecting the cost of energy of marine renewable devices include performance, capital costs, operating & maintenance costs and risks, e.g. due to offshore environment.
Changes to the design of wave energy converters can affect both performance and costs simultaneously. Read more
The software project is aimed at to look in more detail at performance, capital costs, operating & maintenance costs and risks, and some of the key factors that affect it.
The project dedicated to providing robust, full-featured, commercial-quality, and wave energy converter design support on a wide variety of platforms. Read more
Basic Naval Architecture Calculations
JG Maritime Engineering Ltd is planning a complete hydrostatics and stability calculations program for naval architects, ship designers and marine engineers.
Whether it is hull geometry, hydrostatics and stability, or ship motions, sea loads and structural analysis, each modules will be based on the same model in an
integrated system and used interactively in a common graphical user environment. Read more