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ITS » Undergraduate Theses » Teknik Kelautan
Posted by kukuh007 at 26/11/2008 15:22:47  •  11021 Views


ANALISA PENGARUH GELOMBANG TERHADAP ON BOTTOM STABILITY PADA STRUKTUR JACKET WEST LOBE WELLHEAD PLATFORM

ANALYSIS OF ON BOTTOM STABILITY DUE TO OCEAN WAVES ON WEST LOBE WELLHEAD PLATFORM JACKET STRUCTURE

Author :
Manurung, Christof 




ABSTRAK

Proses instalasi struktur bangunan lepas pantai berhubungan erat dengan stabilitas struktur terhadap beban lingkungan yang dialami struktur. Tugas akhir ini membahas analisa onbottom Stability struktur Jacket dengan mengetahui besarnya Safety Factor struktur Jacket west lobe wellhead platform yang beroperasi di laut Natuna dalam proses instalasi sebelum proses pilling. Metoda yang digunakan dalam analisa Onbottom adalah penambahan ketinggian gelombang yang di modelkan dari beban gelombang operasi. Dari hasil analisis statis dengan menggunakan perangkat lunak GT Strudl ver 2.8 dapat diketahui bahwa Safety Factor minimum untuk Overturning Moment sebesar 2.123 terjadi pada momen arah sumbu Z dengan ketinggian gelombang 591m dengan arah gelombang datang 3470. Sedangkan Safety Factor untuk Sliding Force sebesar 2.026 terjadi pada ketinggian gelombang 591m dengan arah gelombang datang 770. Sehingga berdasarkan hasil analisa di atas dapat dijelaskan bahwa pemodelan yang dilakukan telah memenuhi Safety Factor yang direkomendasikan oleh API RP2A WSD 21th tahun 2000.


ABSTRACT

Installation process of offshore platform is related to structure Stability upon load from its environment. Aim of this final project is to elaborate on-bottom Stability analysis of Jacket structure by calculating Safety Factor of Jacket west lobe wellhead platform in Natuna Sea during installation process before pilling. One method has been used in on-bottom analysis which is height addition of wave model from operating load wave. By Static analysis using GT Strudl version 2.8 software we can determine minimum Safety Factor of Overturning Moment is 2.123 in z-axis with wave height 5.91 m and angle of attack 3470 Then Safety Factor of Sliding Force is 2.026 with wave height 5.91 m angle of attack 770. Finally based on result of the previous analysis we can say the modeling that has been used is satisfied the Safety Factors recommended by API RP2A WSD 21st 2000.



KeywordsJaket ; On-bottom ; Safety Factor ; Sliding Force
 
Subject:  Lepas pantai ; struktur hidraulis
Contributor
  1. Ir. Murdjito, M.Sc. Eng
Date Create: 26/11/2008
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Undergraduate-3100
Collection ID: 3100007030047
Call Number: RSKe 627.98 Man a


Source
Undergraduate Theses, Ocean Engineering, RSKe 627.98 Man a,2007

Coverage
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Copyright @2007 by ITS Library. This publication is protected by copyright and permission should be obtained from ITS Library prior to any prohibited reproduction, storage in retrieval 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




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ITS-Undergraduate-3100007030047-2455.pdf




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