Bulk carrier design pdf

After that , we calculate the main dimensions using graphical method. From the preliminary ship design document, we used the formulas to do the Calculations in order to calculate the main dimensions. After doing these calculations , finally we calculate the deadweight estimations. Using this estimations we calculate the percentage difference in displacement. The stern profile is adjusted according to the min rudder clearence which is required.

Generation of sectional area curve Sectional area curve using trapezium method. The length of run and entrance are calculated using formulae.

The length of parallel middle body is calculated. Generation of Lines plan The Lbp is divided into equal no. The body plan is drawn by matching the sections in the sectional area curve. From this body plan the waterlines and profile are drawn. Holtrop calculation By an approximate power prediction method by J. Holtrop and G. Mennen This method is useful in determining the required effective power at the initial design stage of the ship Therefore the Initially estimated power required is Open navigation menu.

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Explore Audiobooks. Bestsellers Editors' Picks All audiobooks. Explore Magazines. Editors' Picks All magazines. Explore Podcasts All podcasts. Difficulty Beginner Intermediate Advanced. Explore Documents. Uploaded by Ameer Khalifullah. Document Information click to expand document information Description: This is a college project of designing a bulk carrier for the group project. It may have some problems.

Original Title Bulk carrier Design project. Did you find this document useful? Is this content inappropriate? Report this Document. Description: This is a college project of designing a bulk carrier for the group project. Flag for inappropriate content. Download now. Bulk Carrier Design Project. Original Title: Bulk carrier Design project. Related titles. Carousel Previous Carousel Next. The narrow hold breadth limits transverse weight shifts and the depth of the double bottom is sufficient to keep the center of gravity of the ore high enough to prevent stiff rolling in a seaway.

Large volume wing tanks are used for ballast. Fig : Cargo hold construction of a typical bulk carrier Designed for low-density cargoes, dry bulk carriers require much greater hold volume than ore carriers, and therefore have much shallower inner bottoms. In some designs the topside tanks are omitted or fitted with bolted plates in the sloping plating facing the hold.

When very light cargoes are carried, the plates are removed and the tanks are filled along with the hold; the cargo in the tanks feeds into the hold by gravity when discharging.

Larger carriers are sometimes built with an inner side shell, which eases hold cleaning and provides additional ballast space. Shallow double-bottom bulk carriers are sometimes designed to carry high-density cargo, by arranging them with alternate long and short holds.

High-density cargo is loaded only in alternate holds to keep the center of gravity high enough to prevent excessive metacentric height. The double-bottom structure under the holds intended for heavy cargo is augmented.

The alternating cargo distribution causes high vertical shear near the bounding bulkheads, which may require increased shell scantlings.

With the increase in industrial demand for raw materials paralleling that for petroleum, the design of bulk carriers, like tankers, also evolved to include larger hulls.

Bulk carrier deadweights range from quite small to over , tons. In order to increase the proportion of payload operation above the percent level typical of most straight bulk carriers for tankers or dry bulk carriers operating between specific ports, cargo is often carried on only one leg of the journey , a trend toward combination carriers began about To facilitate rapid cargo discharge and minimize cleaning requirements, holds are designed with a minimum of internal obstructions that might catch and hold cargo.

Bulkhead stiffening is attained by the use of corrugated plate rather than welded stiffeners. Hold cross section, is arranged so that cargo is self-trimming and self-loading: i Cargo will flow outwards from the point of discharge of bucket grabs or gravity chutes to fill the entire cargo space with a minimum of hand trimming.