Prediction Power Propulsion of the Ship at the Stage of Preliminary Design. Part I: Forecasting Method for Power Propulsion of Ship at the Stage of Preliminary Design

Tadeusz Szelangiewicz,Katarzyna Żelazny

doi:10.1515/mspe-2017-0019

Tadeusz Szelangiewicz, Katarzyna Żelazny

Open Access

https://doi.org/10.1515/mspe-2017-0019

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Abstract

AbstractDuring the design of the ship the most important decisions are made at the stage of preliminary design. One of the most important design parameters assumed by the shipowner is its service speed in real weather conditions occurring in the shipping line. For this speed, at the stage of preliminary design, when are known only to the basic geometric parameters of the ship and its motor power should be determined. In practice, design, power propulsion is determined with a very approximate formulas but for the speed in calm water. Only after the project contract and the signing of the contract are carried out by means of resistance and self-propulsion of model test. The article presents the concept of the method for determining the power propulsion for the assumed service speed, which depends only on the basic geometric parameters of the ship’s hull.

Highlights

Designing vessels, including cargo vessels it is reduced in the first instance to determine the basic main dimensions, displacement and block coefficient and, on the basis of fixed dimensions, the lines of hull of the ship
All subsequent parameters of the designed ship and its properties depend on the basic main dimensions, which are set in the first design stage
On the one hand to reduce the number of iterations leading to the optimal solution, and on the other reduce the possibility of errors in the operating project, developed mathematical models that are functions of certain properties or parameters of the designed ship dependent only on its basic dimensions of the major and most recently on the environmental conditions, which will be operated designed ship

Summary

INTRODUCTION

Designing vessels, including cargo vessels it is reduced in the first instance to determine the basic main dimensions (length, breadth, draught, height side), displacement and block coefficient and, on the basis of fixed dimensions, the lines of hull of the ship. All subsequent parameters of the designed ship and its properties depend on the basic main dimensions, which are set in the first (preliminary) design stage. On the one hand to reduce the number of iterations leading to the optimal solution, and on the other reduce the possibility of errors in the operating project, developed mathematical models that are functions of certain properties or parameters of the designed ship dependent only on its basic dimensions of the major and most recently on the environmental conditions, which will be operated designed ship. The solution defined design task easier mathematical models containing compounds between the geometry of the hull and the propeller and service speed, power propulsion and weather conditions occurring on the shipping line, which is operated ship

THE SPEED AND POWER PROPULSION IN THE PROCESS OF SHIP DESIGN

THE TERM POWER PROPULSION Power propulsion during the ship design

The total resistance of the ship on the shipping line

Geometric parameters of the ship on the stage of preliminary design

FINAL CONCLUSIONS