یافتن بدترین پاسخ فرکانسی سیستم دیسک پره دار تحت تاثیر نامیزانی به کمک الگوریتم ژنتیک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیات علمی؛ دانشگاه جیرفت:

2 نویسنده مسئول و عضو هیات علمی؛ دانشکده مهندسی مکانیک؛ دانشگاه صنعتی اصفهان

چکیده

در این مقاله پاسخ ارتعاشی سیستم دیسک پره­دار تحت تاثیر نامیزانی مورد بررسی قرار گرفته­است. به منظور بررسی اثر وجود نامیزانی در ضرایب سختی و استهلاک هر پره بر دامنه پاسخ پره­ها، ابتدا طرحی ساده برای محاسبه پاسخ سیستم دیسک پره­دار تحت نامیزانی معرفی و روابط آن ارائه شد. برای به دست­آوردن بیش­ترین پاسخ سیستم و یافتن بدترین الگوی نامیزانی، از روش بهینه‌سازی الگوریتم ژنتیک استفاده­ شد. سپس پاسخ سیستم در دو حالت میزان و نامیزان با یکدیگر مقایسه شد. در ادامه بدترین پره یعنی پره­ای که دارای بیش­ترین دامنه ارتعاش است، معرفی خواهدشد. در پایان، پاسخ سیستم برای نامیزانی در سختی پره­ها، نامیزانی در ضریب استهلاک پره­ها و نامیزانی هم­زمان در سختی و استهلاک بررسی و مشخص شده­است. نامیزانی هم­زمان، می­تواند منجر به افزایش قابل توجهی در بیش­ترین دامنه ارتعاش در سیستم شود.

کلیدواژه‌ها

عنوان مقاله [English]

The Worst Response of Mistuned Bladed Disk System Using Genetic Algorithm

نویسندگان [English]

  • Ehsan Raeesi Estabregh 1
  • Saeed Ziaee Rad 2
چکیده [English]

The objective of this paper is to develop a technique using genetic algorithms (GA) for predicting the worst response of mistuned bladed disk. A simple but representative model for the bladed disk system is presented. The response of the system under harmonic excitation was obtained. The worst response of the mistuned system was then formulated as an optimization problem. Next, mistuning in blades stiffness, blades damping and blades stiffness and damping was studied and the results were compared. The results indicate that the system mistuned with both stiffness and damping has higher response amplitude in comparison with other mistuned system.

کلیدواژه‌ها [English]

  • Bladed disk system
  • Mistuned System
  • Worst frequency response
  • genetic algorithm

مراجع

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