The Influence of Padeye Placement on Ship Block Lifting

Main Article Content

Andi Mursid Nugraha Arifuddin
Muhammad Uswah Pawara

Abstract

Nowadays, steel ship construction in Indonesia is dominated by the hull block construction method. This method can reduce man-hours as the ship is manufactured by a division of the hull into several sections/blocks; here, it can be worked in parallel. Once work is finished on these blocks and then proceeding to the main hull for assembling, the lifting operation is performed on the blocks during this erecting process. Lifting of ship blocks must be planned safely to avoid damage. One of the items that must be considered is the position of the padeye. The placement or installation of the padeye in the block during the lifting operation plays a vital role in the deformation and working stress of the block structure. Consequences if this is not observed, which van cause misalignment in the welding join path on ship bloks due to excessive plastic deformation and stress. Therefore, this study aims to simulate the placement of a padeye that results in minimum deformation and structural stress. The method used in this research is the stiffness method applied in computer programs. In this studied, it had been recorded that the structure on the ship blok is deformed and stressed at each padeye position. Based on the simulation from 23 positions of the padeye, the optimal position of the pad eye is at position 10 in simulation 2 with deformation of x, y, and z coordinates which are 7 mm, 2 mm, and 7 mm, respectively. Generrally, In this case shown the deck girder and longitudinal beam structure is dominantly subjected to high deformation and stress in several position.  


Keyword: PadeyeShip Block,  Lifting,  Deformation,  Stress.

Article Details

Section
Articles
Author Biography

Andi Mursid Nugraha Arifuddin, Naval Architecture Department, Kalimantan Institute of Technology

Sinta Author Id : 6667720

DEPARTMENT OF NAVAL ARCHITECTURE

INSTITUT TEKNOLOGI KALIMANTAN

References

REFERENCES

Storch, Richard L., Colin P. M., Howard M. B., Richard C. M. Ship Production: Secon Edition. Maryland: Cornell Maritime Press. 1995

Seung, Ho-Ham. Myung Il-Roh. Time-domain structural analysis during block turnover and lifting using 2D flexible multibody dynamics. Elsevier: Marine Structure 75.102841.2021

Do-Hyun Chun? Myung-Il Roh, Seung-Ho Ham, Hye-Won Lee. A Study on the Methods for Finding Initial Equilibrium Position of a Lifting Block for the Safe Erection. Journal of the Society of Naval Architects of Korea. Vol. 55, No. 4, pp. 297-305, August 2018.

Lee, Hyewon. Il Roh, Myung. Ho Ham, Seung. Block turnover simulation considering the interferences between the block and wire ropes in shipbuilding. Elsevier: Automation in Construction. 67.60-75. 2016.

Wong Lee, Hye. Il Roh, Myung. Ho Ham, Seung. Block erection simulation considering frictional contact with wire ropes. Elsevier: Ocean Engineering. 217.107904. 2020.

Misbah, Muhammad N., Septia H. S., Donny S., Rizky C. A., Satriyo R. Structural Analysis on the Block Lifting in Shipbuilding Construction Process. MATEC Web of Conferences 177, 01027. 2018.

Min Lee, Sung. Il Roh, Myung. Su Kim, Ki. Ho Ham, Seung. Optimum Design of Lug Arrangement Based on Static and Dynamic Analyses for Block Lifting. Journal of Ship Production and Design. J Ship Prod Des 34 (02): 119–133.2018

Sugianto, Agus., Andi M. I. Analysis of Offshore Platforms Lifting with Fixed Pile Structure Type (Fixed Platform) Based on ASD89. AIP Conference Proceedings 1903, 020023.2017.

Rizal, Handayanu, J. J Soedjono. Studi Analisis Lifting dan DesignPadeye pada pengangkatan Deck Jacket Wellhead Tripod Platform menggunakan Floating CraneBarge. Jurnal Teknik POMITS Vol. 1 No.1. 1-6.2013.

Ardianto, A. D. C., Sapto W. S., Mufti F. M. Studi Perbandingan Desain Geometri Padeye Simetri dan Tidak Simetri. Jurnal Integrasi Vol 9, No. 2. 97-105. 2017.

Hughes, Owen. Ship Structural Design: A Rationally-Bassed, Computer Aidded, optimization Approach, Ocean Engineering.2005.

Biro Klasifikasi Indonesia. Rules for Hull Volume II. Jakarta: Indonesia.2021.

Soepartono, F.X., Boen T., Analisa Struktur Dengan Metode Matriks,UI-Press, Jakarta.1987.

Weaver, Williams.,Gere J. M., Alih Bahasa : Ir. Wira, MSCE. Analisa Matriks untuk Struktur Rangka, Edisi Kedua, Erlangga, Jakarta.1986.

International Association of Classification Society No. 47 Shipbuilding and Repair Quality Standard. IACS. 2010.