Analisis Fatigue Limit State Pada Mooring Cleat Floater Pesawat N219A

Yulfani, Rosi Dwi (2025) Analisis Fatigue Limit State Pada Mooring Cleat Floater Pesawat N219A. Masters thesis, Institut Teknologi Sepuluh Nopember.

Text 6020222002-Master_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 April 2027. Download (8MB) | Request a copy

Abstract

Pengembangan Pesawat N219 di beberapa tahun terakhir ini masif dilakukan. Begitu pula dilanjutkan dengan versi amfibinya yang dikenal dengan Pesawat N-219 Amfibi. Berbagai macam penelitian terkait Pesawat N219 Amfibi telah dilakukan, termasuk kajian terkait infrastruktur kepelabuhanan yang mendukungnya. Penelitian ini mengkaji penambatan pesawat N219 Amfibi pada sebuah mooring buoy pasca operasional. Mooring buoy ini memiliki anchor line yang ditambatkan pada seabed. Sedangkan pesawat amfibi ini memiliki mooring cleat pada masing-masing floaternya yang berfungsi sebagai hook point untuk menambatkan portside line dan starbard line ke mooring buoy. Hal ini diperlukan karena tidak semua kondisi pantai dapat digunakan untuk pendaratan pesawat amfibi akibat kondisi pantai yang berbatu dan berlumpur dimana pembuatan dermaga pesawat amfibi memerlukan biaya yang besar. Simulasi numerik penambatan dengan tiga variasi panjang anchor line sesuai dengan aturan Federal Aviation Administration (FAA) yakni 50 meter, 60 meter dan 70 meter dan panjang starboard line serta portside line masing-masing 5 meter telah dilakukan dengan heading 90°, 135° dan 180°. Didapatkan hasil tension maksimum sesuai kriteria yang diijinkan menurut API RP 2SK dengan diameter anchor line berupa chain 0.0175 meter. Sedangkan untuk penentuan area penjangkaran yang terkecil didapatkan jarak antar titik anchor sebesar 130,9 meter. Berdasarkan kondisi fatigue limit state, tegangan yang terjadi pada mooring cleat diklasifikasikan rentang tegangannya dan dihitung menggunakan aturan Palmgren-Miner. Variasi tebal kulit penopang mooring cleat divariasikan dengan tebal 20mm dan 40mm dan didapatkan hasil kulit dengan tebal 20mm memiliki umur pakai yang lebih pendek yakni 63.33 tahun dengan asumsi dilakukan penambatan durasi 9 jam per harinya. Keandalan umur pakai mooring cleat dengan target 10 tahun adalah sebesar 0.9988 dan Indeks Keandalan 3.028.
==================================================================================================================================
In recent years, massive developments have been made in the N219 aircraft. Likewise, it continued with the amphibious version known as the N219 amphibious aircraft. Various kinds of research related to the N219 amphibious aircraft have been carried out, including studies related to the port infrastructure that supports it. This research examines the mooring of the N219 amphibious aircraft to a mooring buoy on post-operational. This mooring buoy has an anchor line that is moored to the seabed. Meanwhile, this amphibious aircraft has a mooring cleat on each floats, which functions as a hook point to tether the portside line and starboard line to the mooring buoy. This is necessary because not all coastal conditions can be used for amphibious aircraft reconnaissance due to rocky and muddy beach conditions, and building a amphibious aircraft dock requires a large amount of money. Numerical simulations of mooring with three variations in anchor line length in accordance with Federal Aviation Administration (FAA) regulations, namely 50 meters, 60 meters, and 70 meters and starboard line and portside line lengths of 5 meters each have been carried out with headings of 90°, 135°, and 180°. The maximum tension results were obtained according to the allowable criteria according to API RP 2SK with an anchor line diameter of a chain of 0.0175 meters. Meanwhile, to determine the smallest anchorage area, the distance between anchor points is obtained at 130,9 meters. Based on the condition of the fatigue limit, the stress that occurs in the mooring cleat is classified into a stress range and calculated using the Palmgren-Miner rule. Variations in the thickness of the deck supporting the mooring cleats were varied with a thickness of 20mm and 40mm, and it was found that deck with a thickness of 20mm had a shorter service life, namely 63.33 years assuming that the mooring was carried out for 9 hours per day. The lifetime reliability of mooring cleats with a target of 10 years is 0.9988 and reliability index 3.028.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Pesawat N219A, mooring cleat, area penjangkaran, tegangan lokal, Palmgren-Miner, umur pakai, keandalan
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.38 Materials--Fatigue. T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures T Technology > TC Hydraulic engineering. Ocean engineering > TC357 Harbor Engineering. Piers, quays, and wharves
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38101-(S2) Master Thesis
Depositing User:	Rosi Dwi Yulfani
Date Deposited:	01 Feb 2025 02:14
Last Modified:	01 Feb 2025 02:14
URI:	http://repository.its.ac.id/id/eprint/117352

Actions (login required)

View Item