ОЦИФРОВКА ДИАГРАММ ДЛЯ ОПРЕДЕЛЕНИЯ КОЭФФИЦИЕНТОВ ОСТАТОЧНОГО СОПРОТИВЛЕНИЯ ВОДЫ ДВИЖЕНИЮ СУДНА

Abstract

The article presents calculating the water resistance to the movement of the vessel, which is quite difficult and time-consuming task. The accuracy of solving this task directly affects the analysis of the ship propulsion. The programs of automated analysis of ship propulsion have become very popular in the shipbuilding industry; they help to increase the efficiency of solving these problems. The existing programs of digitizing graphs have been analyzed. Digitalization comprises building a graph in CAD system with further transforming the file into DFX format in the developed program. A new program for digitizing diagrams which are used in calculating water resistance to the vessel movement has been proposed. The algorithm and operation principle have been presented, as well as a distinctive feature of the developed program. The minimum system requirements for installing the program on a personal computer are indicated. The demonstration analysis of the program by input of source data for calculation and the output area of the work report were made. Based on a diagram representing the dependences of the coefficient of residual water resistance to the movement of the vessel on the overall completeness coefficient for the V-shaped bow of the vessel there is given an example of the sequence of data entry methods and getting results. There have been stated the advantages and weak points of Wizard DFX Digitizer software compared to other means of graphs digitalization. The advantages are: reduced time for graph digitalization and growing precision of the results due to application of CAD tools, ability to save digitizing results and friendly CAD system interface. The weak points are: manual digitizing process, the need to take into account certain specific features of each CAD system.