Melani, Agnes Teresa (2021) Analisa Pengaruh Pemberat (Sinker) Terhadap Daya Dukung (Bearing Capacity) Jangkar Pada Sistem Tambat CALM Buoy: Studi Kasus SBM Pengapon Semarang. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 04311740000071_Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
04311740000071_Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2023. Download (17MB) | Request a copy |
|
Text
04311740000071_Undergraduate_Thesis.pdf Restricted to Repository staff only Download (17MB) | Request a copy |
|
Text
04311740000071_Undergraduate_Thesis.pdf Restricted to Repository staff only Download (17MB) | Request a copy |
Abstract
Penambahan pemberat (sinker) pada tali tambat umumnya digunakan sebagai support untuk jangkar dalam mempertahankan posisinya pada kondisi lingkungan yang ekstrim. Pada analisa ini, penulis akan menganalisa pengaruh sinker terhadap tension tali tambat dan kebutuhan daya dukung jangkarnya. Variasi sinker pada analisa ini adalah 10, 15 dan 20 ton yang akan ditambahkan pada mooring line asimetris CALM Buoy SPM Pengapon Semarang. Jenis jangkar yang digunakan SPM adalah Stevpris MK III pada tipe tanah soft clay. Pada tugas akhir ini, penulis terlebih dulu menganalisa tension tali pada setiap kondisi pembebanan lingkungan dilanjutkan dengan menganalisa daya dukung jangkarnya. Berdasarkan hasil analisa diketahui bahwa tension terbesar terjadi pada line 3 tanpa sinker konsisi DEC dengan arah pembebanan 314.24 derajat yaitu sebesar 1301.19 kN (End A) dan 1310.43 kN (End B). Pada analisa daya dukung jangkar penulis mengacu pada SOF ABS Class 2019 dan grafik Appendix D2 dan D6 API RP 2SK. Hasil analisa tugas akhir ini menunjukan bahwa gradasi berat dan posisi sinker mengakibatkan tension tali antara sinker dan fairlead serta bouyancy meningkat secara linear dengan persentase rata-rata peningkatan sebesar 1.35% dan 5.93%. Sedangkan pada kebutuhan daya dukung jangkar yang meliputi required holding capacity, anchor weight, estimate drag distance/fluke length dan lift force anchor point terjadi penurunan dengan persentase rata-rata sebesar 7.46%, 15.39%, 4.79% dan 15.59%. Berdasarkan pertimbangan hasil analisa tension pada End A dan bouyancy kondisi DEC maka diketahui bahwa sinker 20 ton di posisi 1 merupakan variasi sinker yang cocok pada studi kasus SPM Pengapon Semarang.
========================================================================================================
The addition of sinkers on the mooring line is generally used as a support for the anchor in maintaining its position in extreme environmental conditions. In this analysis, the author will analyze the effect of sinkers on the tension of mooring line and on the bearing capacity of the anchor. The sinker variations in this analysis are 10, 15 and 20 tons which will be added to the asymmetric mooring line of CALM Buoy SPM Pengapon Semarang. The type of anchor used by SPM is Stevpris MKIII on soft clay soil type. In this final project, the author first analyzes the tension of mooring line in each environmental loading condition then proceeds to analyze the bearing capacity of the anchor. Based on the results of the analysis, it is known that the largest anchor tension occurs in line 3 with extreme conditions with the direction of enviromental load 314.24 deg, which is 1301.19 (End A) and 1310.43 kN (End B). In the analysis of the anchor bearing capacity, the author refers to the SOF ABS Class 2019 standard and the Appendix D2 and D6 API RP 2SK charts. The results of this final project analysis show that the gradation of weight and sinker position causes an increase at tension of mooring line (sinker to fairlead) and the bouyancy with the average percentage increase was 1.35% and 5.93%, respectively. Meanwhile, the anchor bearing capacity which includes required holding capacity, anchor weight, estimate drag distance/fluke length and lift force anchor point decreased with an average percentage of 7.46%, 15.39%, 4.79% and 15.59%. Based on the consideration of the results of the tension analysis at End A and the buoyancy of the DEC condition, it is known that the 20 ton sinker in position 1 is a suitable variation of the sinker in the case study of SPM Pengapon Semarang.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | pemberat, tegangan, anchor holding capacity, berat jangkar, estimasi drag distance/fluke length, sinker, tension, holding capacity, anchor weight, estimate drag distance/fluke length |
| 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: | Agnes Teresa Melani |
| Date Deposited: | 18 Aug 2021 13:27 |
| Last Modified: | 18 Aug 2021 13:27 |
| URI: | http://repository.its.ac.id/id/eprint/87219 |
Actions (login required)
 |
View Item |