تحلیل آیروالاستیک پانل‌های انحنادار تقویت‌شده با نانو صفحات گرافنی

نوع مقاله : گرایش دینامیک، ارتعاشات و کنترل

نویسندگان

1 دانشکده مهندسی مکانیک دانشگاه پدافند هوایی خاتم الانبیاء (ص)

2 دانشگاه مالک اشتر مجتمع هوافضا

3 دانشکده مهندسی مکانیک دانشگاه شهید باهنر کرمان

چکیده

در این مقاله، تحلیل ارتعاشات و پایداری پانل هدفمند ساندویچی چندلایه تقویت‌شده با نانوصفحات گرافن و محصورشده با لایه‌های پیزوالکتریک تحت‌تأثیر نیروی آیروالاستیک مطالعه شده است. پانل ساندویچی چندلایه دو جهت انحنادار از مواد متخلخل که با نانو صفحات گرافنی تقویت شده‌اند، در نظر گرفته می‌شود. نانوصفحات گرافن به صورت‌های یکنواخت و غیریکنواخت و همچنین سه نوع توزیع تخلخل هدفمند که به‌صورت لایه و پیوسته در راستای ضخامت تغییر می‌کند فرض شده است. این سازه‌ همواره تحت تأثیر جریان‌ خارجی سیال که با تئوری پیستون مدل‌سازی می‌شود در نظر گرفته شده است. برای استخراج معادلات حاکم بر حرکت به همراه شرایط مرزی از اصل توسعه یافته همیلتون با در نظر گرفتن تئوری‌ مرتبه بالا استفاده شده است. برای گسسته‌سازی معادلات با مشتقات جزئی به معادلات با مشتقات معمولی، از روش‌ گلرکین استفاده می‌شود. تأثیر مواد پیشرفته شامل الگوهای مختلف توزیع تخلخل، ضرایب تخلخل، توزیع یا پراکندگی نانو صفحات گرافن، مقدار کسر وزنی آن‌ها و همچنین، تأثیر ابعاد هندسی سازه‌ بر روی ارتعاشات و ناپایداری‌های دینامیکی سازه‌ها مطالعه می‌شوند.

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