I Ketut Aria Pria Utama
Departement of Naval Architecture and Shipbuilding Engineering, Faculty of marine Technology, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia.

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An Investigation Into The Coupling Of Sloshing Effect Due To Translation Force Of Flng Motions parulian, Luhut Tumpal; Aria Pria Utama, I Ketut; Sulisetyono, Aries
IPTEK The Journal for Technology and Science Vol 25, No 1 (2014)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (615.417 KB) | DOI: 10.12962/j20882033.v25i1.526

Abstract

The motion of FPSO fluid inside gas carrier is normally restricted by loading condition of the vessel, whether the vessel is operated at near empty condition or under 30 % from fully loaded condition. In this way, resonance or sloshing effects of the fluid on the FPSO’s hull are limited. However, nowadays the FPSO carriers are considered to be operated at intermediate loading condition and also during the production. In this condition, the FPSO is more likely to be induced into resonance due to wave action and FPSO motion. This resonance or sloshing behavior of the FPSO leads to high impact pressure on hull storage construction. A theory based on gas dynamics for shock wave in a gas flow has been used to describe the motion of the fluid. Then, a linier potential theory as used in strip theory ship motion. The current paper describes a study model experiment in Maneuvering & Ocean Engineering Basin (M.O.B) at the Indonesian  Hydrodynamic Laboratorium. It  uses a wooden barge at  scale of 1 : 70, together with various wave heading, amplitude and period. Using high speed video camera, the wave front formed by the bore of the FPSO in resonance is observed and the impact to the tank hull is measured.
STUDI KARAKTERISTIK HIDRODINAMIKA KAPAL IKAN TRADISIONAL DI PERAIRAN PUGER JEMBER Indria Dwi Puspita, Hery; Aria Pria Utama, I Ketut
Jurnal Kelautan Nasional Vol 12, No 1 (2017): APRIL
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (760.621 KB) | DOI: 10.15578/jkn.v12i1.6240

Abstract

Secara umum, kapal ikan tradisional digunakan oleh nelayan di Indonesia dalam berlayar untuk menangkap ikan terutama nelayan di Kecamatan Puger, Jember. Pengrajin kapal ikan tradisional di Puger pada dasarnya hanya memodifikasi dari desain kapal sebelumnya dengan dasar keterampilan yang didapatkan dari turun-temurun pendahulunya. Karena kapal ikan tradisional di Puger tidak melalui proses formal dalam pembangunan kapal, maka diperlukan studi karakteristik hidrodinamika kapal ikan tradisional. Studi karakteristik hidrodinamika kapal ikan tradisional ini bertujuan untuk mengetahui kemampuan kapal bertahan dalam kondisi berbahaya saat beroperasi. Metode yang digunakan adalah dengan mengukur secara langsung dimensi utama dan mengukur bentuk body dari tiga kapal ikan tradisional di perairan Puger Jember. Selanjutnya hasil pengukuran tersebut digambar kembali, dan kemudian dilakukan evaluasi resistance dan seakeeping kapal ikan tradisional Puger Jember. Berdasarkan hasil evaluasi resistance dengan berbagai variasi kecepatan, kapal ikan tradisional di Puger Jember dengan lambung berbentuk lebih gemuk memiliki resistance yang lebih besar. Kemudian, dari evaluasi seakeeping ketiga kapal memiliki kriteria gerakan heave, pitch, dan roll yang berbeda-beda sesuai dengan bentuk body kapal.