سال انتشار: 1379
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,655

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تاریخ نمایه سازی: 28 آبان 1384

چکیده مقاله:

The wave transmission, reflection and energy dissipation characteristics of partially submerged `T'-type breakwaters (Fig.1) were studied using physical models. The 2 m wide, 72.50 m long large wave flume available in Ocean Engineering Centre, Indian Institute of Technology Madras, Chennai, INDIA is used for this investigation. Regular and random waves of a wide range of wave heights ‘Hi ‘, wave periods 'T' and a constant water depth 'd' of 70 cm was used. Five numbers of wave probes were utilised to measure incident, reflected and transmitted wave height. Five different depths of immersions, ( D = 0, -5 cm, -10 cm, -15 cm and -20 cm) were selected. Investigations for the following ranges of the normalized conditions are carried out:a.Wave steepness, Hi /L : 0.004 to 0.137 b.Relative water depth, d/L : 0.094 to 0.452 c.Relative wave height, Hi /d : 0.037 to 0.527 d.Relative immersion of the Breakwater, D/d : 0.0 to -0.286 where 'L' is the wavelength. These wide ranges are selected so that this study can be used for a design of this breakwater for a wide range of conditions encountered in shallow to deep water ports The coefficient of transmission, kt (kt = Ht /Hi ), coefficient of reflection, kr (kr =Hr /Hi ), were obtained from the measurements and the coefficient of energy loss, kl is calculated using the law of conservation of energy, where Ht and Hr are the transmitted & reflected wave heights respectively. The effect of Hi /L, d/L and D /d on kt , kr and kl were investigated



Assistant Professor Ocean Engineering Centre Indian Institute of Technology Madras CHENNAI ۶۰۰ ۰۳۶, INDIA.


Assistant Executive Engineer Chennai Port Trust Chennai ۶۰۰ ۰۰۱ CHENNAI ۶۰۰ ۰۳۶, INDIA. INDIA.