Optimasi Berat Minimum Pressure Hull pada Kapal Selam terhadap Buckling akibat Tekanan Hidrostatik pada berbagai Kedalaman

Suarsana, I Gede (2007) Optimasi Berat Minimum Pressure Hull pada Kapal Selam terhadap Buckling akibat Tekanan Hidrostatik pada berbagai Kedalaman. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 4303100023-Undergraduate_thesis.pdf - Accepted Version Download (13MB)

Abstract

Tugas akhir ini membahas bagaimana cara meminimumkan coeffisient buoyancy pada pressure hull yang mampu menahan beban buckling akibat tekanan hidrostatik pada berbagai kedalaman. Beban buckling meliputi local buckling, interframe buckling, frame yeiding dan over all collapse. Pressure hull pada kapal selam dijadikan objek penelitian. Struktur pressure hul terdiri dari silinder dengan ring stiffener yang ditutup dome dikanan dan kiri. Variasi kedalaman 100 meter, 200 meter, dan 300 meter dan di des a in dengan material HY80 dan material HY1 00 High Tension Steel. Standard des a in untuk pressure hull menggunakan ABS "Rules for Buildind and Classing" Underwater Vehicles, System and Hiperbaric Facilities 2002. Pressure hull mempunyai panjang silinder 25m ~ Lb ~30m dan rasio Li/D konstan dengan nilai 5 ~ Li/D ~ 12. Optimasi menggunakan sotfware matlab dengan metode Genetic Algoritma digunakan untuk prosedur optimasi. Tahapan metode genetik algoritma meliputi pembangkitan kromosom secara random dengan jumlah populasi 100 dalam 100 generasi, perhitungan fungsi fitness (coeffisient buoyancy), seleksi untuk mencari coeffisien buoyancy yang paling minimum dan proses mutasi atau pertukaran gen pada kromosom. Penggunaan metode genetik algoritma pada umumnya mempunyai kelebihan yaitu nilai yang didapatkan memiliki tingkat keakuratan yang tinggi dan mampu mengatasi masalah-masalah yang memiliki tingkat kompleksitas tinggi. Hasil analisa coeffisient buoyancy pada material HY80 sebesar 0.2432, 0.336, dan 0.4198 untuk masing-masing kedalaman. Pada material HY1 00 didapatkan coeffisien buoyancy sebesar 0.223, 0.2990, dan 0.3830 dengan struktur pressure hull dinyatakan aman dari beban buckling.
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This final project report investigate the way how to minimize the coefficient buoyancy (weigh I displacement) of pressure hull capable to withstand buckling load caused by hydrostatic pressure under various depths. Buckling loads considered are local buckling, interframe buckling, frame yielding and overall collapse. The submarine's pressure hull is the object of the research. This structure consists of cylinder with ring stiffened and closed by domes at the end Depths are varied from 100 meter, 200 meter and 300 meter and designed using HY80 and HY1 00 high tension steel material. The standard used is the ABS " Rules For Building and Classing" Underwater Vehicles, System And Hyperbaric Facilities 2002. The range of pressure hull's length is 25m ~ Lh ~30m with ratio Lb/D constant with the value 5 ~ Lt/D ~ 12. Matlab optimization software software with Genetic Algorithm Method is use for the trade-off optimization prosedure. Step of Genetic Algorithm Method consist of the chromosome evocation by random with 100 population on 100 generation, calculation of fitness JUnction (coefficient buoyancy), selection to find minimum buoyancy coefficient and mutation process or gene transfer at chromosome. Using Genetic Algorithm Method generally is more advantages such that we can get have high accuracy and able to overcome the problem having high complexity. The analysis results in coefficient buoyancy using material of HY80 equal to 0.2432, 0.336, and 0.4198 for each depth. Using material of HY100, the coefficient buoyancy is equal to 0.223, 0.2990 and 0.3830 which ensure that the structure will save from buckling load

Item Type:	Thesis (Other)
Additional Information:	RSKe 623.825 7 Sua o-1 2007
Uncontrolled Keywords:	Pressure Hull, Beban Buckling, Tekanan Hidrostatik, Optimasi,Genetik Algoritma, Pressure Hull, Buckling Load, Hydrostatic Pressure, Optimization, Genetic,Algorithm
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Totok Setiawan
Date Deposited:	20 Nov 2023 01:35
Last Modified:	20 Nov 2023 01:35
URI:	http://repository.its.ac.id/id/eprint/105154

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