This document develops the final thesis for the MSc in Marine Engineering and Naval Architecture. The task is the preliminary design of a bunkering ship with 4200 m3 of cargo capacity. The ship carries low flash point (FP < 60º) oil products. It is designed in accordance with its corresponding class notation (Bureau Veritas as Classification Society).
Ship design is an iterative process where different objectives are reached by repeating tasks in a sequence in which every repetition is more accurate and detailed and closer to the final solution. This process is now as “Design Spiral”. The objective of this document is to calculate and perform the concept and preliminary design (phases referred to as basic or preliminary design). The tasks of this document are briefly described below.
First, the main ship dimensions are selected. This objective is achieved by collecting a database of similar ships and interpolating the cargo capacity to obtain the different dimensions. The final dimensions are obtained from an analysis of alternatives by studying the feasibility of different length and beam combinations. Once the basic ship design values are set, the hull forms are developed and validated.
The general arrangement of the ship is the next step. The general arrangement plan and chapter are “alive” documents. They are constantly changing and evolving as the project advances. They are constantly updated, and the final version is obtained once the rest of the chapters are closed.
Naval architecture calculation is performed in the next chapter, obtaining the summer freeboard and the tonnage of the ship.
The structural resistance of the ship is developed considering the maximum freeboard (before stability analysis) and the regulatory bending moments. The midship section drawing is made with the results of this chapter.
Power prediction is obtained with HOLTROP methodology. It allows defining the propulsive power. The systems and equipment on board of the ship are studied in this section as well. The next chapter deals with the engine room design, complementing the previous chapter by completing the machinery system on board. The engine room design is completed considering the content of the electrical plant chapter. These three chapters contain the information to develop the Electrical One-line Diagram and the Engine Room drawing.
The information developed up to this point is sufficient to obtain the weight distribution of the ship. Once it is calculated, the stability analysis and the longitudinal strength are evaluated. From the first analysis, stability draught is obtained, and it is to be verified that the scantling draught is superior to it. From the second analysis, the actual bending moments and shear forces acting on the ship are obtained. It is verified that they are inferior to the admissible bending moments and shear forces.
This project ends with a high-level economic study in which the construction cost and the acquisition cost are estimated.
This document develops the final thesis for the MSc in Marine Engineering and Naval Architecture. The task is the preliminary design of a bunkering ship with 4200 m3 of cargo capacity. The ship carries low flash point (FP < 60º) oil products. It is designed in accordance with its corresponding class notation (Bureau Veritas as Classification Society).
Ship design is an iterative process where different objectives are reached by repeating tasks in a sequence in which every repetition is more accurate and detailed and closer to the final solution. This process is now as “Design Spiral”. The objective of this document is to calculate and perform the concept and preliminary design (phases referred to as basic or preliminary design). The tasks of this document are briefly described below.
First, the main ship dimensions are selected. This objective is achieved by collecting a database of similar ships and interpolating the cargo capacity to obtain the different dimensions. The final dimensions are obtained from an analysis of alternatives by studying the feasibility of different length and beam combinations. Once the basic ship design values are set, the hull forms are developed and validated.
The general arrangement of the ship is the next step. The general arrangement plan and chapter are “alive” documents. They are constantly changing and evolving as the project advances. They are constantly updated, and the final version is obtained once the rest of the chapters are closed.
Naval architecture calculation is performed in the next chapter, obtaining the summer freeboard and the tonnage of the ship.
The structural resistance of the ship is developed considering the maximum freeboard (before stability analysis) and the regulatory bending moments. The midship section drawing is made with the results of this chapter.
Power prediction is obtained with HOLTROP methodology. It allows defining the propulsive power. The systems and equipment on board of the ship are studied in this section as well. The next chapter deals with the engine room design, complementing the previous chapter by completing the machinery system on board. The engine room design is completed considering the content of the electrical plant chapter. These three chapters contain the information to develop the Electrical One-line Diagram and the Engine Room drawing.
The information developed up to this point is sufficient to obtain the weight distribution of the ship. Once it is calculated, the stability analysis and the longitudinal strength are evaluated. From the first analysis, stability draught is obtained, and it is to be verified that the scantling draught is superior to it. From the second analysis, the actual bending moments and shear forces acting on the ship are obtained. It is verified that they are inferior to the admissible bending moments and shear forces.
This project ends with a high-level economic study in which the construction cost and the acquisition cost are estimated. Read More
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