EMAIL: PASSWORD:
Front Office
UPT. PERPUSTAKAAN
Institut Teknologi Sepuluh Nopember Surabaya


Kampus ITS Sukolilo - Surabaya 60111

Phone : 031-5921733 , 5923623
Fax : 031-5937774
E-mail : libits@its.ac.id
Website : http://library.its.ac.id

Support (Customer Service) :
timit_perpus@its.ac.id




Welcome..guys!

Have a problem with your access?
Please, contact our technical support below:
LIVE SUPPORT


Moh. Fandika Aqsa


Davi Wahyuni


Tondo Indra Nyata


Anis Wulandari


Ansi Aflacha




ITS » Master Theses » Teknik Perencanaan Bangunan Laut - S2
Posted by anis at 09/01/2007 15:22:17  •  29663 Views


OPTIMISASI JARAK DEMIHULL KATAMARAN BERDASARKAN KARAKTERISTIK HIDRODINAMIKA DAN PEMBEBANAN STRUCTURAL

OPTIMIZATION OF THE CATAMARAN DEMIHULL SEPARATION ON THE BASIS OF MOTION AND STRUCTURAL LOADING CHARACTERISTICS

Author :
PAROKA, PAENG 




ABSTRAK

Jarak demihull merupakan salah satu parameter yang sangat berpengaruh terhadap aspek teknis dan ekonomis katamaran. Dari segi teknis jarak demihull sangat berpengaruh terhadap performansi hidrodinamika seperti gerak hambatan olah gerak manouvering serta karakteristik pembebanan terutama pada struktur penghubung demihull. Dari aspek ekonomis jarak demihull berpengaruh terhadap luas geladak efektifyang secara langsung akan mempengaruhi kapasitas muat efektif. Penentuan jarak demihull dalam perancangan katamaran oleh karena itu harus mempertimbangkan semua aspek teknis dan ekonomis tersebut. Metode optimisasi dalam hubungannya dengan penentuan jarak demihull memungkinkan untuk mendapatkan jarak demihull dengan performansi teknis dan ekonomis yang terbaik Tesis ini membahas pemakaian metode optimisasi dalam penentuan jarak demihull katamaran dengan mempertimbangkan karakteristik hidrodinamika tertentu yaitu mode gerakan sway heave roll dan respon struktur dalam gelombang yang meliputi gaya geser vertical gaya geser horizontal dan momen lengkung transversal pada struktur melintang. Gerak katamaran dan respon struktur diprediksi dengan Metode Frank close-fit dikombinasikan dengan teori strip 2-D. Selanjutnya optimisasi diselesaikan dengan metode golden section dan interpolasi polynomial kubik Hasil studi menunjukkan suatu kecenderungan dimana amplitudo sway heave roU dan percepatan heave cenderung semakin kecil sehubungan dengan bertambah besarnya jarak demihull. Perubahan amplitudo respon gerak terbesar terjadi pada jarak demihull 02 Lbp sampai 04 Lbp. Gaya geser vertical gaya geser horizontal dan momen lengkung transversal pada struktur melintang cenderung semakin kecil sehubungan dengan penambahan jarak demihull untukpanjang gelombang lebih besar dari 10 PL dimana PL adalah jarak antara center line demihull. Ketika panjang gelombang lebih kecil dari 10 PL intensitas ketiga respon tersebut akan bertambah besar sehubungan dengan penambahan jarak demihull sampai jarak demihull 04 Lbp. Pada jarak yang lebih besar intensitas respon struktur akan semakin kecil sehubungan dengan penambahan jarak demihull. Intensitas momen lengkung transversal dominan dipengaruhi oleh interkaksi fluida di antara demihull ketika jarak demihull lebih kecil dari 04 Lbp. Pada jarak demihull yang lebih besar pengaruh jarak demihull lebih dominan bila dibandingkan dengan interaksi fluida di antara demihull. Hasil optimisasi memberikan jarak demihull untuk katamaran yang diambil sebagai obyek adalah 0345Lbp atau 7940ft 2420 m


ABSTRACT

Demihull separation is identified as one among those parameters which significantly influences technical and economical aspects of a catamaran. From the technical point of view demihull separation utterly governs the hydrodynamics performances of catamarans namely motions resistance manoeuvring as well as cross structural response characteristics. Whilst in the economical aspect hull separation governs the effective deck area which further imply on the attainable effective payload The judgement in determining demihull separation within catamaran design should therefore consider those technical and economnical aspects. By way of optimization method related to the determination of demihull separation best technical and economical performances may be reasonably achieved This thesis discusses the application of optimization method in governing the catamaran demihull separation by considering certain hydrodynamics attributes namely sway heave and roll mode of motions as well as the primary wave structural responses which include vertical shear force horizontal shear force and transverse bending moment on the cross-deck structure. Catamaran motions and structural responses in this respect are predicted by employing the so called Frank close-fit technique combined with the 2-dimensional strip theory. Further the optimization procedure is accomplished by adopting the golden section method related to cubical polynomial interpolation. Results of the current study exhibit a peculiar trends where sway heave roll and heave acceleration amplitudes pertinently decrease in association with the increasing of demihull separation. Significant change in motion responses is witnessed to take place within the demihull separation range between 0.2 Lbp and 0.4 Lbp. The vertical shear force horizontal shear force and transverse bending moment on the cross-deck structure gradually decreases in accordance with the increasing of demihull separation for the wavelength ranges larger than 1.0 PL where PL is the distance between demihulls centrelines. In the case where wavelength is less than 1.0 PL the intensities of those responses increase in parallel with the increasing of demihull separation up to 0.4 Lbp. Nonetheless beyond the demihull separation of 0.4 Lbp an opposite trend is acquired Up to the demihull separation of 0.4 Lbp intensity of transverse bending moment is highly dominated by the fluid interaction trapped abetween the demihulls whereas above 0.4 Lbp the importance of cross deck span takes place. By accounting for the motion and wave load response characteristics the current case study on catamaran yields an optimum demihull separation of 0.345 Lbp or 79.40 ft 24.20 m.



KeywordsCatamaran ; gerak ; respon struktur akibat gelombang ; jarak demihull ; optimisasi.
 
Subject:  Model kapal
Contributor
  1. Dr. Ir. Eko Budi Djatmiko, MSc.
    Dr. Ir. Paulus Indiyono, MSc.
Date Create: 09/01/2007
Type: Text
Format: pdf ; 107 pages
Language: Indonesian
Identifier: ITS-Master-3100002015005
Collection ID: 3100002015005
Call Number: 623.823 Par o


Source
Theses Teknik Perencanaan Bangunan Laut RT 623.823 Par o, 2001

Coverage
ITS community

Rights
Copyright @2001 by ITS Library. This publication is protected by copyright and permission should be obtained from the ITS Library prior to any prohibited reproduction, storage in a retrievel system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to ITS Library.




[ Download - Summary ]

ITS-Master-3100002015005-1060.pdf




 Similar Document...




! ATTENTION !

To facilitate the activation process, please fill out the member application form correctly and completely

Registration activation of our members will process up to max 24 hours (confirm by email). Please wait patiently

POLLING

Bagaimana pendapat Anda tentang layanan repository kami ?

Bagus Sekali
Baik
Biasa
Jelek
Mengecewakan





You are connected from 34.204.176.189
using CCBot/2.0 (https://commoncrawl.org/faq/)



Copyright © ITS Library 2006 - 2019 - All rights reserved.
Dublin Core Metadata Initiative and OpenArchives Compatible
Developed by Hassan