MECHANICAL STRUCTURAL ANALYSIS OF SADDLE AND CROSSBEAM ON SHIPLIFT

• Main Author: Fathoni Nugroho, Aryo
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/77494
• Institution: Institut Teknologi Bandung

Indonesia is the biggest maritime country in the world. With a lot of its land separated from each other by sea, ships became an integral part of transportation in Indonesia. However, because ships have mechanical components, they require to be maintained. Maintenance is required to maintain the function and effectiveness of ships. On certain occasions, maintenance must be done on land, specifically in hangars located near the docks. Therefore, a system called shiplift is used to lift the ships from water into land and transport these ships to locations near the docks. The only issue with these shiplift system is that it is very expensive, due to manufacturing and design done by companies outside Indonesia. Due to that fact, PT. XYZ as an Indonesian company, decided to design and manufacture its own shiplift system. In general, a shiplift system is comprised of the hoist system, which includes the winch and pulley system, the transfer system, which contains the rail, bogie, crossbeam, the hydraulic system which will prop the crossbeam up, and lastly the saddle which includes the hydraulic and arm systems. These components will have two main functions, which are to lift vertically docked ships into and out of the water, and to transport ships into and out of hangars located near the docks. As of right now, the shiplift system designed by PT. XYZ is specifically used for submarines and is still in its design phase. This report will function as a structural mechanical analysis of two components in a shiplift which are the saddle and crossbeam which were designed by PT. XYZ. The main purpose of the saddle and the crossbeam is to hold the ship in place when the lifting and transporting processes undergo. Therefore, this report will yield results which determine the safety of the previously designed saddle and crossbeam by analyzing stress, deflection, and ultimately producing the safety factor using finite element method software Abaqus.