Stability Analysis Of Offshore Structure Using Water Pump And Tunnel Ballasting System

Brahmasta, I Made Aradea Caka (2022) Stability Analysis Of Offshore Structure Using Water Pump And Tunnel Ballasting System. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

This paper analyzes how a shipbuilding engineer should be able to design innovative ships or offshore structures through the process of conceptual design, geometric modeling, material selection, static equilibrium, stability check, structural analysis, and control design to achieve a given requirement. To test this ability, a term project was given to create a floating object model in calm water with a size restriction of a cube with 0.3 m sides length that could maintain an initial draft of 0.15 ± 0.01 m even after being loaded with a random weight between 5~8 kg, while still retaining good stability with GM ≥ 0.01 m. The writer responded with a 0.3 m-sided cube object equipped with 2 tunnel-linked side tanks as ballast containers, water detection sensors at the waterline, and an automatic water discharge system. The geometric structure of the object was initially created in a 3D model by using CATIA Modeler. The model would then be imported to HYPERMESH and ANSYS Static Structural to determine the stability and the occurred stresses in the structural analysis stage. The maximum stress on the object could be used to determine the factor of safety (FS) which in turn helped to select the material with appropriate allowable stress. From the structural analysis results, balsa wood would be determined as the suitable material for the floating object. The water discharge system would be automatic by implementing battery-powered water pumps that would be activated with waterline-level water sensors that were connected to the Arduino board. The final model would be built from cut-out balsa wood and installed with the automatic discharge system to be tested in basin water. After completing 4 trial tests with revisions to the structure design, automation system, and code arrangement, the model has successfully passed and fulfilled this project’s objectives with good performance.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Innovative, Offshore Structures, Automatic Discharge, Water Detection Sensors.
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM761 Stability of ships
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	12 Nov 2025 02:53
Last Modified:	12 Nov 2025 02:53
URI:	http://repository.its.ac.id/id/eprint/128778

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