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Anita Susilawati
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Teknik Mesin, Fakultas Teknik, Universitas Riau Kampus Bina Widya, Jl. HR. Soebrantas Km. 12,5 Panam, Pekanbaru 28293, Riau, INDONESIA
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Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Published by Universitas Riau
ISSN : 23547065     EISSN : 25276085     DOI : http://dx.doi.org/10.36842/jomase
Core Subject : Science, Engineering,
Aerospace Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering
The mission of the JOMAse is to foster free and extremely rapid scientific communication across the world wide community. The JOMAse is an original and peer review article that advance the understanding of both science and engineering and its application to the solution of challenges and complex problems in naval architecture, offshore and subsea, machines and control system, aeronautics, satellite and aerospace. The JOMAse is particularly concerned with the demonstration of applied science and innovative engineering solutions to solve specific industrial problems. Articles preferably should focus on the following aspects: new methods or theory or philosophy innovative practices, critical survey or analysis of a subject or topic, new or latest research findings and critical review or evaluation of new discoveries. Scope The JOMAse welcomes manuscript submissions from academicians, scholars, and practitioners for possible publication from all over the world that meets the general criteria of significance and educational excellence. The scope of the journal is as follows: Naval Architecture and Offshore Engineering Computational fluid dynamic and Experimental Mechanics Hydrodynamic and Aerodynamics Noise and Vibration Aeronautics and Satellite Engineering Materials and Corrosion Fluids Mechanics Engineering Stress and Structural Modeling Manufacturing and Industrial Engineering Robotics and Control Heat Transfer and Thermal Power Plant Engineering Risk and Reliability Case studies and Critical reviews
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 329 Documents
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Analysis of Motion on FPSO in Shallow Water with a Non-Collinear Environment Zulkifli, Mohamad Shaiful Mohd; Priyanto, Agoes
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 1 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v1i1.509

Abstract

The ship-shaped floating structures like FPSO has an ability to produce, storage and offloading the oil but it is does not have the drilling capability. Usually the FPSO in shallow water is connected with the single point mooring systems such as Vertical Anchor Leg Mooring (VALM) buoy systems. The objective of this paper is calculate the response amplitude operators (RAO) of spread moored FPSO with two mooring configuration and with the effect of non-collinear environment of wave and current. The analyses done by using ANSYS AQWA (version 14) software with runs two types of analysis which is hydrodynamics diffraction and hydrodynamics time response. The analysis also focuses to calculate the RAO and normalized hawser line force of FPSO and VALM systems. The result from the software has been compared with the experiment result to validate it. The different in meshing elements size also are taken into account. The analysis also focuses to compare the RAO between single leg mooring FPSO and spread moored FPSO with the same loading condition. From the analysis, the RAO for 4 mooring FPSO is higher compared than 8 mooring FPSO but the 8 mooring FPSO shows high value of cable forces than 4 mooring FPSO. It also shows the value of RAO of single leg mooring FPSO is higher compared to the spread moored FPSO.
Feasibility Study of Win-In-Ground for Rescue Operation in Kepulauan Riau Prayetno, E.; Koto, Jaswar; Kader, A.S.A.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 1 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v1i1.508

Abstract

This study aims to investigate performance of current rescue facilities and position based on statistic data of sea accident between 2010 and 2011 in Kepulauan Riau. Current rescue facilities are located at the latitude 0.93105 and longitude 104.4. Using the statistic data, an optimal recue location and facilities in Kepulauan Riau are determine based on International Maritime Organization (IMO) standard. International Maritime Organization requirement , a n emergency, passengers should be able to leave the ship with time 60 minutes. The optimal position and rescue facilities are determined using Great Circle Distance- Spherical Trigonometry and Statistical of Standard Error methods. In this study, simulation code is developed using visual basic 2010 language. Results of simulation show current rescue facility requires a lot of time to reach the accident location which is up to 12.5 hours. In order to meet IMO requirement, this study proposes wing in ground for rescue operation. Using current rescue location, wing in ground also does not meet the IMO standard which is up to 3.04 hours. Additional, this study divides the Kepulauan Riau into two regions of rescue operation. The optimal for rescue facilities of region 1, at the latitude 0.74568 and longitude 104.36256 , and based on the distribution of the accidents in Kepulauan Riau 2010-2011, current rescue facility required up to 5.6 hours to reach the accident area, while the wing in ground facilities required up to 1.3 hours. The optimal for rescue facilities of region 2, at the latitude 3.00338 and longitude 107.79373 , current rescue facility required up to 5 hours to reach the accident area, while the wing in ground facilities required shorter time that is up to 1.2 hour.
Behavior of Subsea Pipelines Expansion under High Pressure and Temperature Design Junaidi, Abdul Khair; Afrizal, Efi; Arif, Dodi Sofyan
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 1 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v1i1.507

Abstract

In offshore operation, Crude oil is transported by means of pipeline system from oil well to platform at High Pressure and High Temperature. The pipeline will experience expansion and multi stresses due to internal pressure and operating temperature that the material properties of pipe tend to deformation which affect to the durability of pipeline. This phenomenon should be considered in the design process of pipeline and to estimate the expansion is under limit of pipeline strength otherwise the pipeline will be failure cause of catastrophic .
Design Study of High Performance Steam Propulsion System for LNG Carrier Siow, C.L.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 1 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v1i1.506

Abstract

This paper was discussed the current possibility technology can be used to design a high performance steam propulsion system for an LNG carrier. The propose system was designed based on the available technology for marine industry. The technical performance analysis was carried out to evaluate the improvement of the system. Economic performance for this system was also discussed in paper. The sensitivity analysis used for the economic performance analysis was made by varying the relative system initial cost and fuel price to cover several possible economic conditions to operate LNG Carrier.
Silica Sand Potency of Bukit Pelintung as Base Material of Solar Cell Kausarian, Husnul; Umar, Mursyidah; Wiyono, Sugeng
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 2 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v2i1.505

Abstract

Bukit Pelintung is a part of the Pematang formation exposed at the surface. Bukit Pelintung has different lithology with the area surround it, where the area surround Bukit Pelintung consists of old and young superficial deposit with peat, clay and silt lithology. Bukit Pelintung is a part of the Pelintung village, subdistrictMedangKampai, Dumai city located in the northeastern city of Dumai. The total area of Bukit Pelintung is about 36km2. Silica sand in Bukit Pelintung associated with iron (Fe2O3) sand and alumina (Al2O3) sand and characterized by different colors of sand. Four-point location of the research area that has been conducted in Bukit Pelintung showed a high silica content. Laboratory test using the X-RF (X-Ray Fluorescence) method showed the compound silica (SiO2) has a high percentage above 95%.
Concept of Gap Distance in Motion Interaction between Multiple Floating Bodies Koto, Jaswar; Siow, C.L.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 2 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v2i1.504

Abstract

Conceptual study on gap distance between multiple floating structures system was related to the effect of wave particle motion on structure motion. The evaluation on the gap distance between floating structures is an important study for multiple floating structures system especially for deep water liquefied natural gas, LNG exploration because the small gap distance between floating structures is needed to guarantee the effectiveness of LNG transfer. This conceptual study only discussed the effect of wave particle motion to the varying of gap distance between structures based on theoretical point of view. The expected result was generated by simple harmonic motion equation but it is no been validate in this paper. The expected result shown that the wave length and the structures initial gap distance give a significant effect to the minimum gap distance can be achieved by two floating structures. The mentioned minimum gap distance in this paper mean minimum distance between two floating structures achieved due to surge motions induced by wave. In addition, the comparison to various selected case found that at the condition where one structure face wave crest and other structure face wave trough will caused closest minimum gap distance between floating structures but minimum gap distance will be the largest if both structures face wave crest and wave trough at simultaneously. Therefore, proper selection of initial gap distance for different ocean condition can help to avoid crashing happen on structures when experience wave induced motion.
Preliminary Design of Autonomous Underwater Vehicle with Higher Resolution Underwater Camera for Marine Exploration Salleh, Z.; Ghani, M.F.; Ramli, M.A.H.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 2 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v2i1.503

Abstract

This research explains on a design and development of an Autonomous Underwater Vehicle (AUV). Definition of AUV is a robotic sub-sea that is a part of the emerging field of autonomous and unmanned vehicles. This project shows the design of implementation of an AUV as a test prototyping vehicle especially involved small-scale and low cost sub-sea robots. The AUV prototype has been design and simulate by using SolidWorks. The AUV assembled with mechanical system, module of electronic system for development of controller.
The Minimal - Sized Ships with a Small Water-Plane Area Dubrovsky, Victor A.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 2 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v2i1.502

Abstract

In theory, a small water-plane area results in a larger than usual immersion of the main displacement volume of a ship’s hull(s).Although practical realization of this theory typically involves an unusually large draft, small vessels tend to have small enough drafts. This contradiction demonstrates the problem associated with a minimal-sized ship with a small water-plane area (SWA ships). Here restrictions in terms of possible displacement and dimensions are described, with the range of minimal displacement and dimensions of an SWA ship estimated and alternative options outlined on the base of [1], [2], [3], [4]. (A SWA hull consists of an under-water gondola as the main displacement volume,together with one or more struts connecting the gondola to the above-water platform. Evidently, the struts intersect the watersurface at design draft.).
Study on Wave Buoy Legged Spider Power Device A, Priyanto; A., Maimun; M., Zamani; Koto, Jaswar; A.S.A, Kader
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 6 No 1 (2014): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v6i1.501

Abstract

This paper studied on Wave Buoy Legged Spider power device, a floating wave energy system based on linear generator. The device contains horizontal cylinders arranged such that it looks like the legs of a spider. Inside cylinders will be equipped with a linear generator. During wave motions, some rotors of the linear generators slide forward and backward, thus generating electricity. As a case, a conceptual design of the Wave Buoy Legged Spider device using floating balls of Malaysian wave buoy for an ocean site in Terengganu, West Malaysia is presented. The wave energy was approximately assessed based on observed wave data. Furthermore a method to determine the directional wave spectra by using nonlinear programming has been proposed with introducing a correction factor in order to avoid the concentration of power spectral density. The capability of this method has been verified by the analysis with the data of the experiments of the floating ball response.
Energy Transmission to Long Waves Generated by Instantaneous Ground Motion on a Beach Bandyopadhyay, Arghya; Mandal, Avijit
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 6 No 1 (2014): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v6i1.500

Abstract

Historically speaking, all high frequency earth-quakes do not produce tsunami which is evident from several earthquakes that took place in Indian Ocean between 2004 and 2006. The works of Geist et.al [’06] and Ammon et.al [’05] are good examples of such study through which they have also pointed out the miserable failures of the existing warning system. The reasons of no-generation of tsunami due to large quakes may be several but in this article we have tried to throw some light on this puzzle and tried to analyze energy transmission to a tsunami motion at steady state and have shown that no energy transmits for certain frequencies of the forcing parameter. We discuss here tsunami waves which are generated instantaneous bottom dislocation where the ocean floor is taken to be of variable slope and analytical solutions are provided correct to all time t.

Page 19 of 33 | Total Record : 329

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