Analisis Tegangan Sling Dan Padeye Pada Proses Lifting Struktur Jacket Saat Erection Dengan Metode Stacking

Salam, Arjunendra Pine (2021) Analisis Tegangan Sling Dan Padeye Pada Proses Lifting Struktur Jacket Saat Erection Dengan Metode Stacking. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

Text 04311740000094-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2023. Download (4MB) | Request a copy

Abstract

Jacket platform merupakan salah satu jenis dari fixed offshore structure dan sudah semestinya jacket platform menjadi struktur pendukung proses migas. Sebelum struktur dapat dioperasikan maka struktur tersebut harus melewati proses fabrikasi terlebih dahulu. Kegiatan yang dilakukan saat proses fabrikasi yaitu menyatukan beberapa bagian kecil atau besar ke bagian lainnya. Salah satu metode fabrikasi jacket platform yaitu dengan metode stacking row b, proses lifting sangat dibutuhkan untuk membantu kegiatan tersebut. Pada penelitian kali ini dilakukan analisis tegangan sling dan padeye pada proses lifting struktur jacket saat erection dengan metode stacking. Agar memudahkan analisis maka pemodelan dilakukan dengan software SACS 12.0 dan untuk melakukan analisis lokal dilakukan dengan software ANSYS. Didapatkan tegangan sling pada variasi dua crane memiliki nilai sebesar 140.03 MPa, variasi tiga crane sebesar 88.46 MPa, dan pada variasi empat crane sebesar 53.30 MPa.Selanjutnya didapatkan juga tegangan pada struktur jacket dengan variasi dua crane, tiga crane, empat crane secara berurutan memiliki nilai UC yaitu sebesar 1.36, 0.66, dan 0.21. Sedangkan nilai defleksi maksimum secara berurutan yaitu sebesar 709.74 mm, 192.70 mm, dan 1.22 mm. Sehingga struktur jacket dengan variasi empat crane dinyatakan paling aman untuk dilakukan proses lifting dikarenakan nilai UC di bawah 1 dan nilai defleksi maksimumnya kurang dari syarat batas yang sudah diperhitungkan. Setelah itu melakukan analisis tegangan lokal menggunakan software ANSYS dan didapatkan nilai distribusi tegangan lokal pada padeye yaitu sebesar 123.73 MPa dengan nilai UC sebesar 0.54 yang mana nilai tersebut dinyatakan aman untuk dilakukan proses lifting dikarenakan nilai UC di bawah 1.
=====================================================================================================
The jacket platform is one type of fixed offshore structure and the platform jacket should be a supporting structure for the oil and gas process. Before a structure can be operated, it must go through a fabrication process first. Activities carried out during the fabrication process are joining several small or large parts to other parts. One of the jacket platform fabrication methods is the stacking row b method, the lifting process is needed to assist this activity. In this research, sling and padeye stress analysis was carried out in the lifting process of the jacket structure during erection using the stacking method. In order to facilitate analysis, modeling was carried out using SACS 12.0 software and to perform local analysis using ANSYS software. It was found that the sling stress in the variation of the two cranes had a value of 140.03 MPa, the variation of three cranes was 88.46 MPa, and the variation of four cranes was 53.30 MPa. Furthermore, the stresses on the jacket structure are also obtained with variations of two cranes, three cranes, four cranes respectively having UC values of 1.36, 0.66, and 0.21. While the maximum deflection values are 709.74 mm, 192.70 mm, and 1.22 mm, respectively. So that the jacket structure with a variation of four cranes is declared the safest to carry out the lifting process because the UC value is below 1 and the maximum deflection value is less than the calculated limit requirements. After that, perform a local stress analysis using ANSYS software and the local stress distribution value for padeye is 123.73 MPa with a UC value of 0.54, which is declared safe for the lifting process because the UC value is below 1.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Jacket Platform, Lifting, Erection, Sling, Padeye, Von Mises, SACS, ANSYS, Jacket Platform, Lifting, Erection, Sling, Padeye, Von Mises, SACS, ANSYS
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Arjunendra Pine Salam
Date Deposited:	12 Aug 2021 08:57
Last Modified:	12 Aug 2021 08:57
URI:	http://repository.its.ac.id/id/eprint/85784

Actions (login required)

View Item