Padeye Strength Analysis of Topside Offloading Platform due to Loadout Using Lifting Method
Abstract
Lifting is one method in the loadout process. Lifting is the activity of moving a structure using the help of a crane. The loadout process moves the structure from the yard to the barge. In this study, a lifting analysis was carried out on the topside offloading platform structure. The analysis also considers the center of gravity shift factor, dynamic load factor (DAF), and other safety factors that occur in the structure during the lifting process. Dynamic load factor using Dynamic Amplification Factor. Cog shift during lifting affects the amount of load being lifted. The most significant load received by the lifting point is 872.507 kN at lifting point 3. During the lifting process, no failure was found in the structural members, as evidenced by the maximum UC value of 0.87. The Padeye used is designed according to the DNV OS-H205 criteria. Several checks on the padeye structure were carried out, comparing the stress that occurred with the allowable stress on several stress reviews, such as tensile stress, shear stress, and bending stress. Local analysis was also carried out on the padeye structure to determine the stress on the padeye structure. Local analysis of the padeye structure was conducted using the ANSYS Workbench software. The results of the regional analysis showed the equivalent von-mises of 164.96 MPa in the padeye structure and 140.04 MPa at the joints, with the allowable stress of ASTM A36 steel material of 250 MPa.
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API RP 2A WSD. 2005. Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms – Working Stress Design. Washington DC: American Petroleum Institute.
AISC. 2010. ANSI/AISC 360 – 10 Specification for structural Steel Buildings. Chicago. American Institute of Steel Construction.
DNV OS H205 Lifting Operation. 2014. Rules of Planning and Execution of Marine Operations. Norway: Det Norske Veritas.
GL 0001-ND rev1,1. 2016. General Guidelines for Marine Projects. Recommended Practice. Germanischer Lloyd.
GL 0013-ND rev11,2. 2016. General Guidelines for Marine Projects, Recommended Practice, Germanischer Lloyd.
Gorat, M. L. P., 2017. Analisis Stabilitas Crane Barge saat Operasi Heavy Lifting. Surabaya: Tugas akhir jurusan Teknik Kelautan ITS.
Novanda, A. K., 2012. Analisa Lifting Topside Platform dengan Pendekatan Dinamik Berbasis Resiko. Jurnal Teknik POMITS, I(1), pp. 1-6.
Putra, B. K., 2020. Analisis Kekuatan Padeye Pada Saat Lifting Struktur Topside Wellhead Pada Proses Loadout. Surabaya: Tugas Akhir Jurusan Teknik Kelautan ITS.
Soelarso, 2015. Analisa Struktur Ula Well Platform Tahap Lifting Dengan Menggunakan Software SACS 5.2 (Studikasus Proyek PT. Bakrie Construction). Jurnal Pondasi, IV(1), pp. 12-19.
Yansah, A. R., 2016. Analisis Konfigurasi Rigging dan Padeye Pada Saat Proses Installation Deck Strukture ULA Platform Dengan Cara Lifting. Surabaya: Tugas Akhir Jurusan Teknik Kelautan ITS.
DOI: http://dx.doi.org/10.12962%2Fj25800914.v8i1.20455
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