شبیه سازی نفوذ پرتابه صلب با سرعت بالا در توده سنگ با استفاده از روش المان مجزا با قابلیت جریان-ذرات
چکیده
در این مقاله نفوذ پرتابه صلب مخروطی با سرعت بالا در توده‌سنگ با استفاده از روش المان مجزای سه‌بعدی با قابلیت جریان ذرات شبیه‌سازی شد. بمنظور شبیه‌سازی توده‌سنگ و پرتابه، المان‌های کروی مجزا بکارگیری شده و بمنظور اتصال ذرات کروی از مدل رفتاری پیوند موازی با قابلیت انتقال نیرو و ممان استفاده شد. مقادیر ریزپارامترهای مدل پیوند موازی با انجام شبیه‌سازی‌های عددی آزمایش فشاری تک محوری توده‌سنگ کالیبره شد. در شبیه‌سازی برخورد پرتابه برای توده‌سنگ ساختگاه مغار نیروگاه بختیاری به خوبی خرد شدن توده‌سنگ و پرتاب قطعات آن با سرعت بالا مدلسازی شد. نتایج نشان داد که تنش‌های فشاری و برشی بزرگی در اثر برخورد به توده‌سنگ القا می‌شود. تاثیر پارامترهایی همچون سرعت اولیه پرتابه، شکل دماغه، وزن و نسبت لاغری (قطر/طول) آن بر نفوذ پرتابه نیز بررسی شد. جهت اعتبارسنجی روش مورد استفاده نتایج با روابط تحلیلی مقایسه شد که تطابق بسیار خوبی بین نتایج ملاحظه گردید.
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