تأثیر مشخصه‌های سینماتیکی در برخورد ورق الاستیک با آب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته دکتری دانشگاه صنعتی امیرکبیر، تهران 15914، ایران

2 دانشیار، دانشکده مهندسی دریا، دانشگاه صنعتی امیرکبیر، تهران 15914، ایران

3 استاد، دانشکده مهندسی هوافضا، دانشگاه صنعتی شریف، تهران 11115-8639

چکیده

نیروی برخورد با آب ناشی از اسلمینگ یکی از نیروهای مهمی است که ممکن است پاسخ هیدروالاستیک سازه شناور به آن قابل توجه باشد. مدل کردن این پدیده و اندرکنش متقابل نیرو هیدرودینامیکی و تغییرشکل سازه از مسائل چالشی در سازه‌های دریایی و نشست روی آب وسایل پروازی است. در این مقاله، با استفاده از مدل هیدروالاستیک موجود که برای برخورد ورق با آب ارائه شده است اثر مشخصه‌های سینماتیکی شامل سرعت‌های عمودی، زاویه‌ای و افقی و همچنین زاویه شیب، بر پاسخ هیدروالاستیک ورق بررسی می‌شود. علاوه بر آن، با استفاده از پارامترهای بدون‌بعد بدست آمده از مشخصه-های سینماتیکی، شرایطی که اثر سرعت افقی و زاویه شیب در برخورد مایل ورق با آب ناچیز است، تعیین گردید. در این شرایط برخورد ورق به سمت برخورد قائم با زاویه شیب صفر میل می‌کند. یافته‌ها نشان می‌دهد که در هر دو برخورد عمودی و مایل، افزایش سرعت عمودی پریود نوسانات را کم می‌کند و رابطه ماکزیمم تغییرشکل با سرعت عمودی و سرعت زاویه‌ای بصورت خطی است.

تازه های تحقیق

 

کلیدواژه‌ها


 
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