مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی تجربی و عددی ارتعاشات آزاد پنل استوانه ای هوشمند دولایه آلومینیوم/ پیزوالکتریک

نویسندگان
1 عضو هیئت علمی گروه مهندسی مکانیک، دانشکده مهندسی، دانشگاه قم، قم
2 مهندسی مکانیک، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد
3 کارشناس ارشد، مهندسی مکانیک، دانشگاه جامع امام حسین (ع)، تهران
4 مهندسی مکانیک، دانشگاه تربیت مدرس، تهران
چکیده
مواد پیزوالکتریک در اشکال مختلفی همچون ورق مستطیلی، دایروی، حلقوی و پنل‌های استوانه ای کاربرد روزافزونی در صنایع، برای هوشمند سازی سازه‌ها، پیدا کرده‌اند. در این مقاله به تحلیل تجربی و عددی ارتعاشات آزاد یک پنل استوانه ای هوشمند دولایه متشکل از یک لایه فلزی و یک لایه پیزوالکتریک در شرایط مرزی و هندسی مختلف پرداخته می‌شود. ابتدا یک پنل پیزوالکتریک به عنوان عملگر برای استفاده در شرایط مورد نظر آماده سازی و در راستای شعاعی قطبی می‌شود. سپس، با اضافه کردن لایه آلومینیومی، پنل استوانه ای دو لایه ساخته شده و از سه روش مختلف به صورت تجربی فرکانس طبیعی آن در شرایط مرزی آزاد اندازه گیری می‌شود. در مرحله بعد، پنل مذکور در یک نرم افزار المان محدود مدل سازی شده و از مقایسه نتایج المان محدود با نتایج تجربی مشاهده می‌شود که انطباق مناسبی بین آن‌ها وجود دارد. همچنین دقت و محدودیت‌های روش‌های تجربی استفاده شده، مورد بحث قرار می‌گیرند. در نهایت تاثیر شرایط مرزی مختلف ساده و گیردار و همچنین پارامترهای هندسی از قبیل ضخامت، عرض و شعاع پنل بر روی فرکانس طبیعی با استفاده از مدل المان محدود تحلیل می‌شود.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Experimental and numerical analysis of free vibration of smart two-layered Aluminum/Piezoelectric cylindrical panel

نویسندگان English

Mahdi Saadatfar 1
Ali Soleimani 2
Arash Karimpoor soumedel 3
Siamak Esmaeilzade Khadem 4
1 Department of Mechanical Engineering, University of Qom
2 Department of Mechanical Engineering, Najafabad branch, Islamic Azad University, Najafabad,
3 Department of Mechanical Engineering, Imam Hossein University, Tehran, Iran
4 Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
چکیده English

Piezoelectric materials, in different shapes such as rectangular plate, annular plate, circular plate and cylindrical shell, have increasing application in industries in order to create smart structures. In this article, experimental and numerical analysis of free vibration of a two-layered cylindrical panel with metal and piezoelectric layer in different boundary condition is carried out. First, a single PZT-4 layer is polarized in radial direction. Using the Piezoelectric layer and an Aluminum layer, a two-layered smart panel is prepared. Then, the first natural frequency of the hybrid panel with free boundary condition is measured experimentally in three different ways. The hybrid panel is simulated in a finite element software (Abaqus). Results show good agreement between different experimental methods, as well as, between finite element model and experimental results. The accuracy, limitations and merits of different experimental methods are discussed completely. The results show that the natural frequency can be achieved accurately by excitation of actuator layer. Finally, the influence of different boundary conditions as well as geometrical parameter such as radios, length and thickness of smart cylindrical panel are investigated using the finite element software.

کلیدواژه‌ها English

Piezoelectric Panel
Free vibration
Experimental Testing
Finite Element Modeling
natural frequency
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