ارتعاشات پوسته استوانه ای دوار مدرج تابعی تحت فشار با تقویت‌کننده حلقوی و محوری

نوع مقاله: مقاله پژوهشی

نویسندگان

1 امام حسین(ع)

2 امام حسین ع

3 دانشگاه امام حسین (ع)

چکیده

در این پژوهش ارتعاشات پوسته استوانه­ای دوار با مواد مدرج تابعی، تحت فشار محوری و داخلی با تقویت­کننده حلقوی و محوری و شرایط تکیه­گاهی دو سر ساده بر اساس تئوری پوسته لاو بررسی شده است. پوسته­های استوانه­ای با تقویت­کننده حلقوی و محوری به­صورت گسترده­ای در سازه­هایی از جمله موشک­ها، زیر دریایی­ها و مخازن سوخت هواپیما مورد استفاده قرار می­گیرند. خصوصیات مکانیکی مواد مدرج تابعی پوسته استوانه­ای دوار طبق تابع توانی در جهت شعاع به­طور پیوسته تغییر می­کند. در این بررسی مواد مدرج تابعی به­کار رفته از نیکل و فولاد ضد زنگ تشکیل شده است، که نیکل در سطح داخلی و فولاد ضد زنگ در سطح خارجی پوسته قرار دارد. معادلات حاکم بر پوسته استوانه­ای با استفاده از اصل همیلتون و روش انرژی استخراج می­شود و تاثیر پارامترهای مختلف نظیر سرعت دورانی، تقویت­کننده­های حلقوی و محوری، بار محوری، فشار داخلی و خواص مواد مدرج تابعی بررسی شده است. صحت نتایج حاصل­شده با مقایسه آنها با نتایج حاصل از پژوهش­های قبلی مورد بررسی قرار گرفته و مطابقت خوبی بین کار حاضر و مطالعات پیشین دیده شده است

کلیدواژه‌ها


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