بررسی تجربی و عددی اثر کاهش عرض بر توان خروجی تیر برداشت‌کننده انرژی پیزوالکتریک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه امام حسین(ع) دانشکده فنی و مهندسی

2 دانشگاه امام حسین(ع)، دانشکده فنی و مهندسی

چکیده

با توجه به کاهش منابع انرژی جهان، برداشت انرژی ارزان از محیط پیرامون اهمیت زیادی پیدا کرده است. از مهم ترین روش های برداشت انرژی، برداشت انرژی از مواد پیزوالکتریک می باشد و اخیرا محققان بر روی بهینه سازی این نوع برداشت‌کننده‌های انرژی متمرکز شده اند. در این مقاله به بررسی تجربی و عددی اثر کاهش عرض تیر بر میزان برداشت انرژی از تیر یکسرگیردار حامل پیزوالکتریکی که حرکت هارمونیک دارد، پرداخته شده است. در این پژوهش از یکی از جدیدترین مواد پیزوالکتریک بنام الکترو-اکتیو پیپر سلولزی استفاده شده است. در ابتدا یک تیر با عرض ثابت مورد بررسی قرار گرفته و سپس دو تیر یکسردرگیر متصل بصورت سری و موازی که عرض هر کدام نصف عرض تیر اولیه می‌باشند، مورد تحلیل واقع شده‌اند و در مرحله بعدی تیر واحد را به سه قسمت مساوی تقسیم کرده و حالات سری و موازی این تیرها مورد بررسی قرار گرفته‌اند و نتایج عددی با داده‌های آزمایشگاهی مقایسه شده اند. ملاحظه می‌شود که اگر عرض یک تیر را به چند قسمت مساوی تقسیم کرده و چند تیر با عرض کمتر ایجاد شود و بصورت سری به یکدیگر متصل گردند، میزان برداشت انرژی در این حالت از تیر واحد اولیه به طور قابل توجهی بیشتر خواهد بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Experimental and Numerical Investigation of Width Reduction Effect on the Output Power of Piezoelectric Energy Harvester Beam

نویسندگان [English]

  • Saeid Mansouri 1
  • Rouhollah Hosseini 2
1 Imam Hossein Comprehensive University Faculty of Engineering
2 Imam Hossein Comprehensive University, Faculty of Engineering
چکیده [English]

Considering that global energy resources are decreasing, energy harvesting from the environment has become more important. One of the most important methods of power scavenging from environmental vibrations is energy harvesting using piezoelectric materials, and researchers have recently focused on optimizing this type of energy harvesters. In this paper, the effect of decreasing beam width on the amount of harvested energy from an oscillating piezoelectric cantilever beam is investigated using experimental and numerical methods. In this study, one of the newest piezoelectric materials called electro active paper cellulose has been utilized. At first, a fixed-width beam was investigated, and then two beams with half-width of the initial beams were analyzed in series and parallel connections with the same boundary conditions, and in the next stage, the unit cantilever was divided into three equal parts and serial and parallel states of these beams have been investigated and the results are compared with laboratory data. It is seen that if the width of a beam is divided into several equal parts and some beams with fewer width and series connection are utilized, amount of harvested energy is significantly greater than the initial beam.

کلیدواژه‌ها [English]

  • Energy harvesting
  • Piezoelectric
  • Cantilever beam
  • Harmonic oscillation
  • Series and Parallel connection

مراجع

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نشریه مهندسی مکانیک امیرکبیر
دوره 52، شماره 5
مرداد 1399
صفحه 1257-1272

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