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تأثیر مشخصههای سینماتیکی در برخورد ورق الاستیک با آب | ||
دوفصلنامه مهندسی شناورهای تندرو | ||
مقاله 3، دوره 18، شماره 54، شهریور 1398، صفحه 26-35 | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
هاشم مرادی* 1؛ احمد رهبر رنجی2؛ حسن حدادپور3 | ||
1دانش آموخته دکتری دانشگاه صنعتی امیرکبیر، تهران 15914، ایران | ||
2دانشیار، دانشکده مهندسی دریا، دانشگاه صنعتی امیرکبیر، تهران 15914، ایران | ||
3استاد، دانشکده مهندسی هوافضا، دانشگاه صنعتی شریف، تهران 11115-8639 | ||
تاریخ دریافت: 05 بهمن 1398، تاریخ بازنگری: 27 اسفند 1398، تاریخ پذیرش: 02 اردیبهشت 1399 | ||
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 | ||
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کلیدواژهها | ||
مشخصههای سینماتیکی؛ ورق الاستیک؛ برخورد با آب؛ پاسخ هیدروالاستیک؛ تغییرشکل ورق | ||
اصل مقاله | ||
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مراجع | ||
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