Desain Multipurpose Landing Craft Tank Menggunakan Metode Optimisasi Global dan Lokal

Zumar, Varisha Vada (2018) Desain Multipurpose Landing Craft Tank Menggunakan Metode Optimisasi Global dan Lokal. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Multipurpose LCT (Landing Craft Tank) dikenal sangat efisien untuk pengangkutan alat berat, pekerjaan pertambangan dan proyek konstruksi. Keberadaaan multipurpose LCT diharapkan mampu membantu perkembangan daerah terpencil di Indonesia, salah satunya kabupaten Kepulauan Mentawai. Metode optimasi sangat tepat untuk menyelesaikan persoalan desain kapal yang kompleks. Pemodelan optimisasi yang akan digunakan adalah gabungan dari optimisasi global dan lokal. Metode optimisasi global dan lokal ini dinilai mampu menentukan nilai ukuran utama kapal yang optimum. Pada global optimization, nilai yang didapatkan bersifat umum atau global sehingga hasil yang didapatkan kurang mampu mencapai nilai optima. Oleh karena itu digunakan optimasi lokal untuk mengatasi kelemahan tersebut. Optimasi global menggunakan metode Artificial Neural Network (ANN) dan optimisasi lokal menggunakan metode Generalized Reduced Gradient (GRG). Optimasi dilakukan dengan pembuatan program add-ins pada Microsoft Excel menggunakan Visual Basic For Application (VBA). Fungsi objektif yaitu meminimumkan biaya pembangunan kapal. Dari hasil optimisasi global didapatkan 7 kombinasi ukuran utama dari 10000 kombinasi ukuran utama yang memenuhi batasan optimasi. Perbandingan antara fungsi objektif terminimum optimasi global dengan optimasi global dan lokal yang memenuhi seluruh batasan optimisasi adalah 4.19%. Perbandingan antara nilai fungsi objektif maksimum dan minimum pada optimasi global adalah 7%, sedangkan perbandingan antara nilai fungsi objektif maksimum dan minimum pada gabungan optimasi global dan lokal adalah 10%. Hasil optimisasi gabungan metode global dan lokal menghasilkan fungsi objektif yang lebih optimum. ========== viii DES IGN OF MULTIPURPOSE LANDING CRAFT TANK (LCT) USING GLOBAL AND LOCAL OPTIMIZATION Author : Varisha Vada Zumar Student Number : 4114100 0 79 Department / Faculty : Teknik Perkapalan / Teknologi Kelautan Supervisor : Hasanudin, S.T., M.T. ABSTRACT Multipurpo se landing craft tank ( LCT ) is known as very efficient for heavy equipment transport, mining work and construction projects. The exist of multipurpose LCT was expected to help develop in remote areas in Indonesia, such as Mentawai Islands regency . The opti mization method is perfect for resolving complex ship design issues. Optimization modeling that used is combine of global and local optimization. This global and local optimization method was capable of determining the optimum ship main dimension. Global o ptimization, the value obtained is general or global so that the results obtained less able to reach the value of optima. Therefore, local optimization used to overcome these weaknesses. Global optimization uses Artificial Neural Network (ANN) methods and local optimization using the Generalized Reduced Gradient (GRG) method s . The optimization is working by creating an add - in program in Microsoft Excel using visual basic for application (VBA). The objective function is to minimize the cost of ship building. From the results of global optimization obtained 10 main size combinations of 10000 combinations of key sizes that meet the limits of optimization. The comparison between the minimum global optimization value with global and local optimization is 5.14%. T he ratio between the maximum and minimum objective function values for global optimization is 5%, while the comparison between the maximum and minimum objective function values on the combined global and local optimization is 7%. The combined optimizat ion results of global and local methods produce more optimum objective functions.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Landing Craft Tank; Global Optimization; Local Optimization; Visual basic for application
Subjects: V Naval Science > V Naval Science (General)
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions: Faculty of Marine Technology > Naval Architecture and Shipbuilding Engineering > (S1) Undergraduate Theses
Depositing User: Varisha Vada Zumar
Date Deposited: 29 Jan 2018 04:33
Last Modified: 29 Jan 2018 04:33
URI: http://repository.its.ac.id/id/eprint/50904

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