INVESTIGATION ON SOME CONVENTIONAL HULLS FORMS OFTHE PREDICTIVE ACCURACY OF A PARAMETRIC SOFTWAREFOR PRELIMINARY PREDICTIONS OF RESISTANCE AND POWER

[摘要] Preliminary prediction of resistance and power is a fundamental aspect of the ship designprocess since they directly influence the developments of the design process, fuel consumptionand costs, and environmental impact from the early design stage. Parametric predictions ofresistance and power, based mainly on statistical regression models that are also ideal forcomputer programming, are often performed during initial design stages, providing rapidpredictions and optimisations for minimum resistance. The paper aims to present the results ofthe comparative analysis on some conventional hulls of the predictive accuracy of a computerprogram developed by the author for parametric predictions of resistance and power of ships.The program (entitled Ship Power V 1.0) is developed in the Visual Basic 6.0 environmentbased on two well-known regression models Holtrop and Van Oortmerssen. The program canperform detailed predictions of resistance and power, resistance coefficients, propeller thrust,hull efficiency, wake, and trust fractions, with no restriction on the number of velocities. In thisstudy, only the analysis of the accuracy of resistance and power prediction is considered.Results of the comparative analysis of the computational procedures of Ship Power V 1.0 versusexperimental data, and against results of another well-known commercial software, performedon three models of the Ridgely-Nevitt trawler series and KCS hull have shown a good level ofaccuracy and reliability as other well-known commercial software.

[学科分类] 工程和技术（综合）

[关键词] Resistance;power;regression models;ship design;experimental data