Syamsul Asri

Clustering ferry ports class-I based on the ferry ro-ro tonnages and main dimensions

Capacity constraint of port for Ferry Port Class I is not clearly stated in the Indonesian National Order of Port Affairs. It only said that ferry ship to be serviced is ships with more than 1000 gross tonnages (GTs). The word more than 1000 GTs is unclear as there are ships with up to 12500 GTs to be serviced in this port. This research introduces cluster of Ferry Port Class I. Ship main dimension and tonnage of sample ships is being used as a basis for the port clustering. The result shows that Ferry Port Class I should be divided into three main Ferry Port Classes I (Class IA, Class IB and Class IC). This new cluster of Ferry Port Class I can be used as a reference in updating the rules regarding ferry port class and as a reference in the design of ferry port main facilities.

Collapse Analysis on VLCC Subjected to Longitudinal Bending with Damages

The objective of the present study is to analyze the progressive collapse of VLCC hull girder with damages subjected to longitudinal bending. For the simple case, the cross-section is assumed to be remained plane and the vertical bending moment is applied to the cross section. The residual stress, initial imperfection, and crack are not considered. The damages scenarios are located at the center part and asymmetric position of the cross section. To analyze the progressive collapse including its behavior of VLCC ship hull, the simply supported is imposed to the cross section and taking the hogging and sagging condition into account. The results obtained for intact and damages condition by the analytical solution is compared and summarized with one another.