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| تعداد شماره‌ها | 1,192 |
| تعداد مقالات | 8,579 |
| تعداد مشاهده مقاله | 6,989,850 |
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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 | ||
| عنوان مقاله [English] | ||
| Effect of kinematic characteristics on the impact of an elastic plate with water | ||
| نویسندگان [English] | ||
| Hashem Moradi1؛ Ahmad Rahbar Ranji2؛ Hassan Haddadpour3 | ||
| 1PhD, Department of Ocean Engineering, Amirkabir University of Technology, Tehran 15914, Iran | ||
| 2Associate professor, Department of Ocean Engineering, Amirkabir University of Technology, Tehran 15914, Iran | ||
| 3Professor, Department of Aerospace Engineering, Sharif University of Technology, Tehran 11115-8639, Iran | ||
| چکیده [English] | ||
| The water impact force caused by slamming is one of the important forces that the hydroelastic response of the craft's structure may be significant. Modeling of this phenomenon and the interaction between the hydrodynamic force and deformation of the structure are the challenging problems in offshore structures and water landing aircraft. In this article, the effect of kinematic characteristics including vertical, angular and horizontal velocities, as well as slope angle, on the hydroelastic response of the plate is investigated using the existing hydroelastic model presented for water impact. In addition, dimensionless parameters obtained the kinematic characteristics are employed to determine the conditions in which the horizontal velocity and inclination angle are significant or not during an oblique impact. In these conditions, the plate tends toward the vertical impact with the slope angle of zero. The findings show that increasing the vertical velocity reduces the oscillation period of deflection in both vertical and oblique impacts, and the relationships of maximum deflection with vertical velocity and angular velocity are linear. | ||
| کلیدواژه‌ها [English] | ||
| kinematic characteristics, elastic plate, water impact, hydroelastic response, plate deflection | ||
| اصل مقاله | ||
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| مراجع | ||
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آمار تعداد مشاهده مقاله: 16,774 |
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