fa مطالعه آزمایشگاهی تاثیرعرض اولیه سکو و قطر مشخصه سنگدانه های لایه آرمور در پایداری موج شکن های سکویی شکل پذیر شرايط محيطي و زيست محيطي Environmental Study مقاله پژوهشي Research Paper The predominant principle included in the design of reshaping berm breakwaters is the supply of a wide berm at or nearby the water level with less armor stone size than that used in conventional design, which are allowed to reshape until an equilibrium slope is attained. In the present study, the recession of the berm due to wave and structure parameters has been investigated based on two dimensional experimental modeling in a wave flume. A series of 156 tests have beencarried out with irregular waves with JONSWAP spectrum to observe the behavior of the structure.To cover the effects of initial berm width and stone sizes on berm recession, several wave parameters such as wave height, wave period and storm duration have been considered. To analyze the results, the experimental data are presented together, leading to a formula for prediction of the berm recession considering foregoing parameters, i.e. wave and structural parameters. Experimental Modeling, Reshaping Berm Breakwater, Berm Recession, Initial Berm Width, Stone Size 85 96 http://marine-eng.ir/browse.php?a_code=A-10-189-1&slc_lang=fa&sid=1 Mohammad Reza Shekari محمدرضا شکاری m.shekari@modares.ac.ir 1003194753284600867 1003194753284600867 No Tarbiat Modares University Mehdi Shafieefar مهدی شفیعی فر shafiee@modares.ac.ir 1003194753284600868 1003194753284600868 Yes Tarbiat Modares University