engleski

LOADING AND UNLOADING CALCULATION FOR THE TANKER DESIGN PURPOSE

The problem of loading and unloading procedure of new tankers is dealt with in the preliminary and project design stage as one of the predominant tasks. The port arrangement, such as the increase of loading and unloading capacity, is the second important request for the control of discharging and the control of the ship"s tehnical behavior. Due to the uncontrolled loading/unloading procedure, the tehnical calculation of loading/unloading procedure is nowdays more and more requested because of incidents which are dangerous both for life and property. This conclusion about the necessary calculation by which we are continuously controlling the loading/unloading procedure concerns all ship types. The calculation of the loading/unloading procedure for certain double hull tankers is based on on-line specially oriented ship stability control. In recent years, the main design parameters in cargo and ballast tankes arrangement in double hull tankers have resulted in partially undefined design solutions. The dilemma is focused on wheter to incorporate, or not, the central longitudinal bulkhead in cargo tanks area. The additional dilemma is whether to incorporate or not the longitudinal central girder in double bottom. The choice of main dimension ratio is also an element for further investigation in recent new tankers design. The new rules requirements about satisfying damage stability in comparison with the ship"s intact stability requirement, also influences the adequate recommendations for evaluation of damage condition with reduced damage extens. The future tanker design optimization for double hull tankers will be one of the most attractive tasks for shipyard and shipping companies, and continuation and enlargement of this work has to be expected.

LOADING-UNLOADING CARGO AND BALLAST; DOUBLE HULL TANKERS

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