Lestari, Dwi (2017) Analisa Keandalan J-Tube Clamp Terhadap Tegangan Lokal Maksimum: Studi Kasus W Platform. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Analisis keandalan diperlukan dalam perencanaan penambahan fasilitas. Pada penelitian ini dilakukan analisis keandalan dilakukan secara lokal pada J-tube dan clamp yang berfungsi untuk menyokong umbillicals pada struktur W Platform. Terdapat gaya dan tegangan yang bekerja pada struktur akibat adanya beban lingkungan serta beban dari struktur itu sendiri. Hasil penelitian berupa indeks keandalan clamp terhadap von Mises terbesar yang terjadi diantara 6 buah clamp. Dari hasil analisis lokal diketahui bahwa tegangan von Mises paling besar terjadi pada J-tube 2 untuk clamp dengan elevasi (+) 4.178 m sebesar 57.33 MPa. Penilaian keandalan dilakukan dengan metode Advanced First Order Second Moment untuk mengetahui indeks keandalan yang terjadi akibat penambahan umbillicals. Indeks keandalan J-tube clamp terhadap tegangan von Mises yang terjadi sebesar 2.4. Berdasarkan API RP 2A – Load and Resistance Factor Design indeks keandalan untuk sambungan adalah sebesar 2.5, sehingga dapat dikatakan struktur J-tube clamp belum memenuhi kriteria desain LRFD.
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Reliability analysis is required in the planning of additional facilities. In
this research, reliability analysis is done locally
on J
-
tube and clamp which serve
to support subsea ca
bles on
W
Platform
. There are forces and
stresses
acting on
the structure due to the environmental load and the load of the structure itself. The
result of the research is clamp reliability index to
maximum
von Mises stress
that
occur
s
between 6 clamps. From the results of local analysis it is known that
the
maximum
von Mises
stress occurs on J
-
tube 2 for clamp with elevation (+) 4.178
m of
57.33
MPa. Assessment of reliability is done by Advanced First Order
Second Moment method to find out the reliability index that occurs due to the
addition of
umbillic
als
.
The reliability index of J
-
tube clamp structure with
maximum
von Mises
stress analysis is
4.33
.
Based on API RP 2A
-
Load and
Resistance Factor Design, reliability index for connection is 4.5, so it can be said
that J
-
tube clamp structure has not fulf
illed LRFD design criteria.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 627.98 Les a-1 3100018074660 |
| Uncontrolled Keywords: | J-tube clamp, analisis lokal, tegangan, indeks keandalan |
| Subjects: | T Technology > T Technology (General) > T58.62 Decision support systems T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Dwi Lestari |
| Date Deposited: | 19 Mar 2018 02:27 |
| Last Modified: | 22 Sep 2020 00:28 |
| URI: | http://repository.its.ac.id/id/eprint/50041 |
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