ارائه حل تحلیلی برای مطالعه رفتار دینامیکی لوله‌های ویسکوالاستیک حامل سیال با اعمال فرم کلی مدل ساختاری

نوع مقاله: مقاله علمی پژوهشی

نویسندگان

دانشکده مهندسی مکانیک، دانشگاه تبریز

چکیده

با ارائه فرم کلی مدل ویسکوالاستیک، مشخصه‌های ارتعاشی لوله‌های ویسکوالاستیک حامل سیال مطالعه شده است. معادله حرکت با لحاظ کردن انواع مدل‌های ساختاری ویسکوالاستیک استخراج و شکل مودهای سیستم با ارائه حل دقیق بدست آمده است. نتایج نشان می‌دهد که با اعمال مدل ویسکوالاستیک، فرکانس‌های طبیعی کاهش یافته و سرعت ناپایداری دیورژانس در مودهای بالاتر به شدت افزایش می‌یابد. به عنوان یک نتیجه جدید مشاهده می‌شود در لوله‌های ویسکوالاستیک به ازای مقادیر مشخصی از پارامترها، ناپایداری فلاتر می‌تواند سریع‌تر از ناپایداری دیورژانس اتفاق افتد. بعلاوه، به علت عدم تأثیر یکسان رفتار ویسکوالاستیک بر مودهای ارتعاشی، رفتار مودهای ترکیبی ظاهر نمی‌شود.

کلیدواژه‌ها

موضوعات


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