Static Evaluation Of Double-Body Offshore Structure Using Passive Ballasting System

Dewandari, Trinita Laras Puspita (2022) Static Evaluation Of Double-Body Offshore Structure Using Passive Ballasting System. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

This study examines a double-body offshore structure, such as a floating structure, ballast tank system that goes vertically from the top of the lower body to the bottom of the lower body. These holes, whose dimensions were calculated, will let out this ballast water. The passive ballasting system in this double-body structure will rely on the bottom body's water function. The maximum weight that can be added to the structure will be the same as the capacity of the ballast tank. The water in the ballast tank may leak because the pressure of the water inside the structure is the same as that of the water outside. The initial draft condition must always remain in the structure. The passive ballasting method will be utilized because of its benefits. The technical calculations and design of the offshore platform are carefully evaluated for efficiency, stability, and safety. The three primary body parts of this structure are the piston, the upper-part body, and the lower-part body. Manual calculations are used in this project. In addition, modeling and simulation use software from CATIA, PATRAN, and HYPERMASH. The static evaluation will be calculated in this project to calculate the effect of steady (or static) loading conditions on a structure, while ignoring inertia and damping effects, such as those caused by time varying loads. The real test and real simulation in water basin are also conducted during the working process.
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Jurnal ini menganalisis struktur lepas pantai dengan badan ganda seperti struktur terapung, sistem tangki ballast yang bekerja secara vertikal dari bagian atas badan ke bagian bawah badan. Terdapat beberapa lubang yang ukurannya telah dihitung, kemudian akan mengeluarkan air dari tangki ballast. Sistem ballast pasif dalam struktur badan ganda ini akan bergantung pada fungsi air pada struktur bagian bawah. Berat maksimum yang dapat ditambahkan ke struktur akan sama dengan kapasitas tangki pemberat. Air dalam tangki balas dapat keluar karena tekanan air di dalam struktur sama dengan tekanan air di luar. Kondisi draft awal harus tetap sama dengan akhir setelah ditambah beban tambahan secara otomatis. Perhitungan teknis dan desain anjungan lepas pantai dievaluasi dengan cermat dalam aspek efisiensi, stabilitas, dan keamanan. Tiga bagian struktur utama dari struktur ini adalah piston, struktur bagian atas, dan struktur bagian bawah. Perhitungan manual juga digunakan dalam penelitian ini. Selain itu, pemodelan dan simulasi menggunakan software dari CATIA, PATRAN, dan HYPERMASH juga dilaukan. Evaluasi statis akan dihitung dalam proyek ini untuk menghitung pengaruh kondisi pembebanan tunak (atau statis) pada struktur, dengan mengabaikan efek inersia dan redaman, seperti yang disebabkan oleh beban yang berubah terhadap waktu. Uji nyata dan simulasi nyata di tangki air juga dilakukan selama proses kerja.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Struktur Lepas Pantai, Ballast Pasif, Evaluasi Statis, Offshore Structre, Passive Ballast, Static Evaluation
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	10 Dec 2025 07:40
Last Modified:	10 Dec 2025 07:40
URI:	http://repository.its.ac.id/id/eprint/128910

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