Anggraeni, Ariesta Ayu Dian (2016) Analisis Tegangan Lokal Maksimum Yoke Arm Pada Eksternal Turret Mooring System Fso Ladinda. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Perkembangan sarana yang digunakan di industri migas memberikan banyak kemajuan
teknologi inovasi seperti FSO dengan sistem tambat External Turret Mooring System
berupa Tower Mooring System. Pada penelitian ini akan membahas kekuatan kontruksi
sebuah connector pada Yoke Arm dengan FSO dimana pada bagian tersebut harus
mampu menahan beban-beban yang bekerja pada FSO. Dengan mengetahui gerakan
dari FSO terhadap beban gelombang, maka dapat diketahui besar tegangan yang terjadi
pada sambungan FSO dan yoke arm. Karakteristik kapal dilihat dengan RAO gerakan
translasi dan rotasi pada kondisi full load, light load, serta free floating dan mooring.
Nilai terbesar pada kondisi light load pada gerakan translasi adalah gerakan sway
3.1571 m/m dan gerakan rotasi adalah gerakan roll sebesar 1.8130 deg/m saat free
floating. Nilai terbesar pada kondisi light load pada gerakan translasi adalah gerakan
heave 1.0915 m/m dan gerakan rotasi adalah gerakan pitch sebesar 0.8500 deg/m saat
mooring. Akibat pergerakan dari FSO yang diakibatkan oleh beban lingkungan dengan
skenario beberapa heading didapat Nilai tension force terbesar pada kondisi light load
sebesar 99.906 N pada pembebanan arah heading 180 derajat. Hasil analisis dengan
FEM untuk connector yoke arm menunjukkan besar tegangan maksimum (von misses
stress) sebesar 178.61 MPa dari arah pembebanan head sea (180°). Berdasarkan acuan
pada ketentuan ABS, tegangan von mises tidak lebih dari 90% dari yield strength
sebesar 225 sehingga konstruksi sambungan yoke arm masih dalam batas aman.
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The development of the tools used in oil and gas industry providing many innovative
technological advances such as the FSO with External Turret Mooring System in the form of
Tower Mooring System. This research will discuss about construction strength of a connector
on Yoke Arm with FSO which in turn must be able to withstand the loads acting on FSO. By
knowing the movement of FSO to wave loads, it can be seen of the stress that occurs in
connection with the yoke arm FSO. Characteristics of the FSO can be seen by RAO
movement of translation and rotation with two conditions of full load and light load on the
state of free floating and mooring. The greatest value at light load conditions at the
translational movement is a sway movement 3.1571 m/m and the rotational movement is a
roll movement of 1.8130 deg/m when free floating. The greatest value at light load conditions
at the translational movement is a heave movement 1.0915 m/m and the rotational movement
is the pitch movement of 0.8500 deg/m while mooring. Due to the movement of the FSO
caused by environmental load scenarios heading gained some greatest tension at light load
conditions for 99.906 N in the loading direction heading 180 degrees. Results of analysis by
FEM for the yoke arm connector showed a large maximum stress (von misses stress)
amounted to 178.61 MPa from the direction of loading head sea (180 °). By ABS rules, von
mises stress of not more than 90% of the yield strength of 225 so that construction arm yoke
connection still within safe limits.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 627.98 Ang a |
| Uncontrolled Keywords: | Connector Yoke Arm, External Turret Mooring, RAO, heaving, pitching,Von Misses Stress, Free Floating, Mooring |
| 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: | Mr. Tondo Indra Nyata |
| Date Deposited: | 21 Feb 2018 06:49 |
| Last Modified: | 26 Dec 2018 03:55 |
| URI: | http://repository.its.ac.id/id/eprint/51323 |
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