Napa Releases a New Software

Napa Group has released a new software version, NAPA 2008.1, with numerous updates and novel features in different segments of the software.

One of the main areas of focus has been the development of new tools for probabilistic damage stability calculations. This development work is made very important by the fact that the new SOLAS 2009 regulations will come into effect early next year.

The new release has the capability to check compliance with SOLAS 2009. In damage generation, for instance, NAPA can now handle the complexity caused by A-class bulkheads. Furthermore, the horizontal escape routes can be now modelled and are taken into account in the calculations. In addition, much development work has been done to make it easier to use these extensive features; to this end, a new user interface has been introduced, in the form of a NAPA Manager. The revised PROB Manager application provides an intuitive workflow that guides the user through the process of making the calculations.

Napa has also taken the first step towards what the latest technologies have provided for reporting. Napa has implemented a new functionality set that produces XML output of all the components, such as tables, graphics, text and so on. The XML generated in this way follows the specification of DocBook, which is a commonly used semantic markup language for technical documentation. Further, the DocBook XML can then be processed e.g. into PDF documents.

As to ship hydrodynamics, the highlight of the new release is the Tahara RaNS solver. This is a state-of-the-art RaNS CFD solver based on the Flowpack code of Professor Yusuke Tahara (Osaka Prefecture University). The integration of CFD code into a powerful ship design system such as NAPA really makes CFD analysis accessible to a larger group of naval architects.

Development of offshore specific functionality has continued as well. Release 2008.1 includes an extensive set of tools for checking the stability of various offshore structures. The NAPA 3D model can also be used for other purposes in the offshore design. For example, NAPA Steel can be utilised for further designing of the steel structures of offshore vessels.

NAPA Steel also introduces many new features in version 2008.1. The most significant improvements are related to FEM. The new version includes a novel automatic meshing algorithm which provides much better quality of the mesh and is also much faster than its predecessor. Another highlight is the new set of interactive tools for modelling the stiffeners on the curved parts of the hull surface. These tools make what was once a fairly challenging task much more user-friendly. A third innovation in NAPA Steel are the new drawing functions that further streamline the process of producing drawings automatically from the 3D model.

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