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.).
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.
Universiti Kuala Lumpur, Technical Foundation Section, Malaysian Institute of Marine Engineering Technology, Lumut, Perak, Malaysia
Universiti Kuala Lumpur, Marine Electrical Electronics Technology Section, Malaysian Institute of Marine Engineering Technology, Lumut, Perak. Malaysia
Universiti Kuala Lumpur, Marine Design Technology Section, Malaysian Institute of Marine Engineering Technology, Lumut, Perak, Malaysia
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.
Department of Aeronautics, Automotive and Ocean Engineering, Universiti Teknologi Malaysia, Skudai, Johor Baharu, Malaysia
Offshore Engineering, Ocean and Aerospace Engineering Research Institute, Indonesia
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%.
Engineering Geology, Universitas Islam Riau, Indonesia
Petroleum Engineering, Universitas Islam Riau, Indonesia
Civil Engineering, Universitas Islam Riau, Indonesia