بررسی فشارهای دینامیکی وارد بر صفحه موج نفوذپذیر تحت تابش امواج منظم

نوع مقاله: مقاله پژوهشی

چکیده

برای طراحی مؤثر و کارای یک صفحه موج تخمین دقیق فشار دینامیکی و نیروی موج ضروری می­باشد. این مطالعه به بررسی فشار دینامیکی وارده بر اجزای سازه­ی یک صفحه موج متشکل از لوله­های افقی که با فاصله ثابت کنار هم قرار می‌گیرند، می­پردازد. این صفحه موج می‌تواند برای انتقال و تبادل آب دریا در ناحیه بندری مفید باشد و امکان جذب مؤثر انرژی موج را فراهم نماید. به این منظور آزمایش‌های فیزیکی بر روی صفحه موج تحت تابش امواج منظم در 3 ارتفاع و 6 پریود از موج با عمق آب ثابت 6/0 متر انجام گرفت. هم‌چنین 3 قطر متفاوت برای لوله­های صفحه موج در نظر گرفته شد. توزیع فشار دینامیکی وارد بر لوله‌های صفحه موج در امتداد عمقی و پیرامون آن توسط مبدل فشار اندازه‌گیری گردید. نتایج نشان داد افزایش تخلخل موجب کاهش تغییرات فشار دینامیکی موج می­گردد و با افزایش ارتفاع موج تابشی نوسانات فشار برای تخلخل‌های مختلف افزایش می­یابد. هم­چنین بیشینه تغییرات فشار دینامیکی موج در زاویه‌های بیش­تر از 45 درجه ایجاد گردید.

کلیدواژه‌ها


عنوان مقاله [English]

Waves Investigation of Dynamic Pressure on Wave Screen under Regular

چکیده [English]

For a cost-effective design of wave screen, an accurate estimation of dynamic pressure and wave force is needed. This study investigates the dynamic pressure action on elements of wave screen. The wave screen consists of several horizontal pipes with constant distance between them. This wave screen provides convection, interchanges of seawater within the harbor district, and makes available wave energy absorption effectively. The experimental were done on regular waves with 3 heights and 6 periods of waves at a constant water depth of 0.6 m. Also 3 difference diameters were considered for wave screen pipes. Dynamic pressures distribution along and around the pipes were measured by the pressure transducers. The results indicated that with increasing of the porosity, the pressure difference was decreased and with increasing of the incident wave height, pressure fluctuation for different porosity was increased. Furthermore, the maximum dynamic pressure fluctuation occurred at the angle more than 45°.

کلیدواژه‌ها [English]

  • Breakwater
  • dynamic pressure
  • Porosity
  • Regular Wave
  • Wave Screen
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