Development Of Ship Performance Calculation And Analysis Software Based On VB.NET

The stability and strength of the ship are generally set store by the people in the fields of design, shipbuilding and management at all times. However, there are some problems or mistakes in our practical design, manufacture and use all the same. It not only endangers the safety of ships, lives and wealth, but also influences the economic benefits of shipping companies directly. Nowadays, the requirements of ship's safety are stricter and stricter in the world. All the countries and the societies have constituted relevant criterions, and it must be follow sternly by all the working ships. Therefore it is very necessary for us to research the stability and strength of the ships, which confirmed when the ships were designed and checked when the ships are in sail.All the research and discussion have been done in this thesis based on the practical problems met in the ship performance calculation and analysis, combined the characteristics of ship's structure and loading situation. A suit of feasible program project of the ship performance calculation and analysis software has been summed up, according to the theories of ship static, ship strength and the sea ship stability criterion.At first, a theoretic algorithms library of ship performance calculation and analysis was formed through studying on the methods of ship performance calculation and analysis. Then the main function modules and the basic function modules were developed according to the modular design ideas. After that, a ship performance calculation and analysis software system, which with the Windows style, high calculation speed and precision, was developed in Visual Basic.NET language and connected to the Microsoft Office Access database through the interface of ADO.NET. The software was designed following the principles of directness, consistency, feedback and fault-tolerate. Its friendly, intuitive user interface, which is made up of menus, toolbars, dialogs, etc, embodied the user-centric fully. The software has a lot of functions such as buoyancy calculation, initial stability calculation, big dip stability calculation, stability check calculation and ship strength calculation. The results can be show in a graphical form, for example the Bonjean's curve, the hydrostatic curve, the stability cross curve, the flooding angle curve, cabin capacity curve, etc. At last, the software was test and debugged to insure it could run well in various conditions. Such a discussion on this software is really beneficial to ship's stowage planning design, which made ship management more accurate, digitalized and scientific.The calculation results of a bulk carrier named B&M REACH proved the feasibility and accuracy of the software in practical using. It shows that this software plays a positive role in guaranteeing the safety of sailing, enhancing the efficiency of transporting, reducing the labor strength of sailors.