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MODIFICATION OF DOUBLE BOTTOM HEIGHT AND ITS EFFECT TO THE ULTIMATE STRENGTH
Alie M.Z.M.
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering OMAE
Abstract
Abstract Double bottom is one part of the ship’s construction which is located at the bottom and it functioned to overcome when the ship collides with the other object at the outer of ship’s bottom. One of the parameters of the double bottom that must be considered is double bottom height. These would affects to the section inertia, section modulus and neutral axis position leading to the ultimate strength of ship. The objective of the present study is to analyze the ultimate strength caused by the double bottom height before and after modification. The double bottom height is analyzed according to the existing condition, national and international classification. Those formulas are different so that it is very important to know those effects. The numerical method is adopted to analyze the tankers ship caused by changing the double bottom height before and after modification. The force rotation is given at the master node since it is placed after determined the position of neutral axis as reference point. It is observed that the double bottom height gives significant influence to the ultimate strength according to existing condition, national and international classification before and after modification under hogging and sagging conditions. The ultimate strength in terms of the moment-curvature relationship including their behavior is presented in this study.