بررسی ارتعاشات غیرخطی میکرو لوله حامل سیّال تحت تحریک پارامتریک مغناطیسی

علوم کاربردی و محاسباتی در مکانیک

مقاله 6، دوره 31، شماره 1 - شماره پیاپی 21، اسفند 1398، صفحه 69-86   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/fum-mech.v31i1.80049

نویسندگان

رضا جهانگیری^{* 1}؛ اکبر اللهوردی زاده²؛ بهنام داداش زاده²؛ حمید عظیم زاده¹

¹دانشگاه آزاد اسلامی واحد سلماس

²دانشگاه تبریز

چکیده

در این پژوهش، اثر پارامترهای مختلف سیستم روی پاسخ غیرخطی نوسانات جانبی میکرولوله تیرمانند حاوی سیّال با شرایط مرزی دو سر ساده نامتحرک تحت شرایط تشدید پارامتریک مغناطیسی محوری بررسی می­شود. از تئوری تغییر شکل‌های برشی مرتبۀ اوّل ردی و تئوری الاستیسیته غیرمحلی ارینگن برای استخراج معادلات غیرخطی حاکم بر حرکات جانبی میکرولوله با لحاظ کردن جملات غیرخطی هندسی ون‑کارمن استفاده می­شود. در سرعت‌های جریان بالاتر از سرعت بحرانی آستانه فلاتر (متناظر با کوپلینگ مو‌دهای اوّل و دوم)، رفتار سیستم غیرخطی دو درجۀ آزادی تحت شرایط تشدید پارامتریک مغناطیسی تحلیل می­شود. با استخراج منحنی‌های پاسخ غیرخطی، اثرات پارامتر‌های دامنۀ تحریک مغناطیسی، پارامتر فرکانس تحریک و پارامتر غیرمحلی تنش روی دامنۀ تشدید سیستم بررسی و مورد بحث قرار می­گیرد.

کلیدواژه‌ها

ارتعاشات غیرخطی؛ میکرو لوله حاوی سیال؛ تشدید پارامتریک مغناطیسی؛ تئوری الاستیسیته غیرمحلی

سایر فایل های مرتبط با مقاله

EA6-jahangiri-Nahayi.pdf

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