F. Azarsina
Department of Naval Architecture, Faculty of Marine Science and Technology, Science and Research branch, Islamic Azad University, Tehran, Iran
[ 1 ] - Analysis of air injection system for drag reduction in high speed vessels using numerical simulation software ANSYS-Fluid Flow
Many existing phenomena in nature are considered new design ideas in various fields of industry. Bionics is the application of biological methods and systems found in nature to the study and design of engineering systems and modern technology. By performing bionic review, the researchers found the penguins by delivering air locked under their wings and creating air bubbles, the drag significant...
[ 2 ] - Stability analysis of concrete gravity basestructures in rocking motion under wave effect
Given the worldwide industry progress in the construction of massive concrete structures, it would be a good idea to use concrete gravity base structures (GBS).In this regard, better understanding of thesestructuresregardingtheiradvantages and disadvantages in offshore areas seems necessary.The present study employed MacCammy-Fuchs method, which is based on the size of the structure to the wave...
[ 3 ] - Optimization of concrete structure mixture plan in marine environment using genetic algorithm
Today due to increasing development and importance of petroleum activities andmarine transport as well as due to the mining of seabed, building activities such as construction of docks, platforms and structures as those in coastal areas and oceans has increased significantly. Concrete strength as one of the most important necessary parameters for designing, depends on many factors such as mixtu...
[ 4 ] - Design and construction of 6-component balance dynamometer for measurement of the forces, moments andmotions of ship models in the towing tank
During design spiral of a merchant ship or a naval vessel, it is important to perform towing tank tests in order to measure its performance either in calm water maneuvers or in waves for seakeeping performance. Also, to optimize a hydrodynamic design, towing tank tests are advantageous.This article presents the results of an applied research project. The objective of this project is to design a...
[ 5 ] - Materials performance assessment of protective layer of rubble mound breakwaters, southern coast of Iran
This study aims to examine the performance of the rock materials in the protective layer of rubble-mound breakwaters in southern Iran, from Rostami Port in Bushehr Province to Beris Port in Sistan and Baluchestan Province. Field inspections were carried out on a great number of rubble-mound breakwaters built in the Persian Gulf and Oman Sea coastal regions to study the protective layer of these...
[ 6 ] - Effect of environmental parameters on the amount of scour in marine structures
Scour is a phenomenon that occurs as a result of natural erosion by ground water flow and transport of seabed material. In this research, scour around the legs of marine structures is simulated using the FLOW3D.V.9.3™ commercial software. The general scour model consists of two components, namely, the lift and thrust forces. The drag force, that is inserted to the structure, is a combination of...
[ 7 ] - Seismic Behavior of Jacket Offshore Platform Subjected to Near and Far Field Ground Motions
Offshore structures such as jacket platforms have to inevitably be designed against sever environmental actions. In seismically active areas these structures also become susceptible to earthquake excitations. Strong ground motions recorded in recent earthquakes, including the 1995 Kobe, Japan, 1999 Chi-chi, Taiwan and 1999 Kocaeli, Turkey earthquakes, revealed that the dynamic motions in nea...
[ 8 ] - Nonlinear statics analysis of on offshore jaket platform in the case of explosion
Explosion and fire on an offshore rig can lead to its minor or complete damage and sinking which means the loss of life or environmental pollution. Hence the use of techniques such as blast wall is crucial to reduce the detrimental effects. These blast walls are designed for explosion wave of length between 0.1 to 1 of load mainly to protect the personnel and critical sections. In this research...
[ 9 ] - A comparative study of sloshing in liquefied natural gas (LNG) carriers according the classification codes
This paper assesses the design guidelines of different classification codes for the liquefied natural gas carriers considering the effect of liquid sloshing. With regard the increasing importance of LNG carriers in today’s marine transportation, and also considering that the marine accidents involve significant loss, classification societies by regulating national and international standards ai...
[ 10 ] - Feasibility Study of Building a Human Powered Hydrofoil Vessel
In this paper, a feasibility study of building a Human Powered Hydrofoil (HPH) vessel is reported. Hydrofoil vessels are a well-known class of high-speed crafts. In addition to high-speed operation, the hydrofoils have a reliable maneuvering capability, good stability and proper operation in waves. Also, a human powered vehicle, nowadays is an advancing idea. Different aspects of the design and...
[ 11 ] - مطالعه آزمایشگاهی اثر اسلاشینگ بر حرکات یک کشتی حمل مایعات در امواج منظم
Given the increasing importance of vessels carrying liquefied natural gas (LNG), the high cost of incidents and also projects related to the design and construction of LNG transport vessels requires further investigation of fluid sloshing inside tanks of these vessels. This paper, reports the towing tank, equipped with a wave-maker, test results on a one-to-176 model of a product carrier with a...
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