PLATFORM-SHIP COLLISION ANALYSIS LOCATED IN MADURA STRAIT USING FINITE ELEMENT METHOD

• Main Author: Parningotan, Jonathan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/78164
• Institution: Institut Teknologi Bandung

Platform-ship collision are something that is avoided by all parties, but this does not rule out the possibility of this happening. Analysis of ship and platform collisions is carried out to determine the response of the structure and the ship as well as the forces and energy that occur in both as a result of the collision. Collision analysis was carried out using the finite element method using the Abaqus application. To be able to analyze a ship-platform collision, a model of the platform and the ship that will be collided is first created. The two models will then be combined in the Abaqus application, with each model using a shell type in the section specifically for analysis. The materials used by ship and platform in the Abaqus application are defined as elastic and plastic materials, which means that both ship and platform can be deformed either elastically or plastically depending on the amount of force received. The ship speed used in the analysis of ship collisions with this platform is 12 knots or 6173.33 mm/s. These speeds are selected based on commonly used vessel speed values for risk assessment. A realistic approach to the modeling made means that simulation analysis of shipplatform collisions must be carried out using non-linear finite element methods due to the complexity of the problem. Solving the problem of ship-platform collisions is carried out using the explicit solver in the Abaqus application. Simulation analysis of platform ship collisions was carried out for two types of cases, namely collisions with ship weighing 7500 tons and collisions with ship weighing 68000 tons. It was found from the results of the analysis from the collision simulation that in a platform collision with a 7500 ton ship there was a shift of 6.08 m in the part that was shifted furthest, whereas in a platform collision with a 68,000 ton ship there was a shift of 7.28 m in the part that was shifted the furthest. Then the platform also absorbs energy due to the collision with the ship, while the force absorbed by the platform due to the collision with the 7500 ton ship is 5.63714 E+10 mJ and due to the collision with the 68000 ton ship is 7.18736 E+10 mJ.