تحلیل ضربه‌ کم‌سرعت خارج از مرکز ورق ساندویچی با تکیه‌گاه های نقطه‌ای به شیوه نیمه تحلیلی

نوع مقاله: مقاله علمی پژوهشی

نویسندگان

1 دانشگاه صنعتی خواجه نصیرالدین طوسی

2 دانشکده مهندسی مکانیک، دانشگاه صنعتی خواجه نصیر‌الدین طوسی، تهران، ایران

چکیده

در پژوهش کنونی، رفتار ورق ساندویچی با تکیه‌گاه های نقطه‌ای در معرض ضربه‌ کم‌سرعت خارج از مرکز، برای اولین بار بررسی شده است. نوآوری دیگر، شامل پیشنهاد یک حل نیمه تحلیلی به همراه فرمولبندی انرژی جدید، جهت در نظر گرفتن وابستگی مکانی و استفاده از یک روش انتگرالگیری عددی زمانی ضمنی می باشد. معادلات حرکت برپایه اکسترمم سازی انرژی پتانسیل کل، با در نظر گرفتن کار نیروهای اینرسی، به شیوه ریتز پیدا شده و به طور ابتکاری، به فرم شبه استاتیکی تبدیل شده است. بر خلاف پژوهشهای موجود، اثر سفتی لایه های زیرین بر ضربه نیز دخالت داده شده است.

کلیدواژه‌ها

موضوعات


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