تحلیل اغتشاشات تیر مجهز به جاذب دینامیکی غیرخطی تحت تحریک رزونانسی و غیررزونانسی

نوع مقاله: مقاله علمی پژوهشی

نویسندگان

1 عضو هیات علمی/ دانشگاه تبریز

2 دانشجوی دکتری مهندسی مکانیک/ گروه مهندسی مکانیک- دانشکده مکانیک- دانشگاه علم و صنعت ایران

چکیده

تأثیر جاذب غیرخطی بر ارتعاشات پایای تیر یکسرگیردار تحت تحریک رزونانسی و غیررزونانسی بررسی شده‌است. پس از استخراج معادلات، بی‌بعدسازی و اعمال روش گالرکین، از روش مقیاس‌های چندگانه برای حل استفاده شده و تأثیر پارامترهای جاذب بر رفتار ارتعاشی سیستم مطالعه شده است. نتایج نشان می‌دهد در ناحیه پرش، تحت شرایط خاصی، امکان عملکرد بهتر جاذب غیرخطی در کاهش دامنه وجود دارد. همچنین، گرچه نتایج حاکی از عدم وجود تفاوت عمده‌ در رفتار ارتعاشی سیستم در حضور جاذب‌های خطی نامیرا، میرا و غیرخطی در تحریکات غیررزونانسی است ولی جاذب غیرخطی باعث جابجایی فرکانس‌های تشدید و تغییر بازه‌ی فرکانسی غیررزونانسی می‌شود.

کلیدواژه‌ها

موضوعات


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