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۱Numerical Study of Wave Hindcasting and Propagation at Tombak site in Central Part of Northern Persian Gulf Coastline
اطلاعات انتشار: هفتمین همایش بین المللی سواحل، بنادر و سازه های دریایی، سال
تعداد صفحات: ۶
Accurate prediction of wave specifications is essential for design of nearshore and offshore structures and coastal engineering projects. This paper presents the numerical study of wave hindcasting and propagation at Tombak area in central part of Northern Persian Gulf coastline in Bushehr province. In this regard, firstly the offshore waves are hindcasted using the wind climate of the area. Then, the wave propagation from offshore to near shore is numerically modeled by using MIKE–NSW software. The results are compared with the available data in the area in order to validate the results. The results of the wave model after validation are presented in terms of horizontal distribution, statistical parameters and wave transformation coefficients from offshore to near shore.<\div>

۲COMBINATION OF LARGE–SCALE AND LOCAL SHORELINE CHANGE STUDIES FOR HORMOZGAN COASTLINE AND QUSHM ISLAND AT THE NORTHERN PERSIAN GULF
اطلاعات انتشار: دهمین همایش بین المللی سواحل، بنادر و سازه های دریایی، سال
تعداد صفحات: ۱۱
Prediction of accretion and erosion and coastline change are essential for a shoreline management plan (SMP) and to support decision making in Integrated Coastal Zone management (ICZM). The study for this purpose mostly includes the large or regional scale study; however the local or intermediate–scale study for engineering applications is also included. Organization of the study is therefore vital; whereby the balance between the coverageand accuracy is accomplished and sufficient details for diverse applicants are provided. This paper provides the overview of the approach applied to combine two scales of the study for prediction of shoreline evolution in long shoreline of Hormozgan and Qushm Island. The study is outlined in three levels, to logically deal with different scales of the work in terms of coverage, tools, applications and required accuracy of the outcomes for both managerial and engineering applications<\div>

۳Dynamic mooring analysis of LPG export jetty in Kharg Island
نویسنده(ها): ،
اطلاعات انتشار: نهمین همایش بین المللی سواحل، بنادر و سازه های دریایی، سال
تعداد صفحات: ۱۲
Mooring analysis is of prime importance for the design and operation of ports. Dynamic mooring analysis provides simulation of interaction of vessels و mooring lines and breasting points (fenders) in a real state.Oscillatory behavior of incident waves and wind loads on vessels and then on mooring points can besolely considered by dynamic analysis. This paper describes the analysis of dynamic behavior of mooring system of an LPG jetty (under construction) in Kharg Island in Persian Gulf for three sizes of vessels. Thedynamic behavior of vessels is studied by simulation of vessels and mooring lines with MOSES software.The analysis is made in order to investigate safe conditions for mooring. The downtime of vessels would be one of major outcomes of the study. The parametric study and discussion on various parameters which affect the results of the dynamic simulation and consequently deciding on optimum arrangement of mooring system is of advantage of this study<\div>

۴Evaluating the Validity of Quasi–Static Analysis for Prediction of Vessel Mooring Line Forces
نویسنده(ها):
اطلاعات انتشار: International Journal of Maritime Technology، اول،شماره۱، ۲۰۱۳، سال
تعداد صفحات: ۶
Quasi–Static analysis of moored vessels is vastly used for engineering designs, as a substitute to the numerical simulation of dynamic mooring analysis. Yet, the level of validity of the results of quasi–static analysis is a matter of discussion. In the present study, the validation of the assumptions behind the quasi–static analysis of mooring vessels is examined with application of a dynamic model for a number of vessel sizes and mooring configurations. The results show that in the moderate wave condition (wave height less than 1.2m), the main assumption of not applicability of wave forces in prediction of line forces is acceptable the differences being less than 5 percent. However, distribution of forces between spring and breasting lines is not coincided with the anticipation of response of the system. The parametric study shows that the critical condition for line tensions is not necessarily corresponding to the exact coincidence of directions of wind, current and wave forces. Also, the forces exerted on fenders in some cases are maxima in direction, different from the perpendicular to the vessel. This means that the mooring line arrangement considerably dictates the distribution of the tension in mooring lines and reaction in fenders. Hence, the accuracy of the quasi–static analysis highly depends on the mooring lines configuration.
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