Nonlinear Vibration Analysis of Piezoelectric Functionally Graded Porous Timoshenko Beams

  • سال انتشار: 1398
  • محل انتشار: مجله علوم و مهندسی هوافضا، دوره: 12، شماره: 1
  • کد COI اختصاصی: JR_JASTI-12-1_005
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 166
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نویسندگان

Enayatollah Hosseinian

Department of Aerospace Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran , Iran

Ali Nouri

Aerospace Faculty, Shahid Sattry Aeronautical University of Science and Technology

Majid Zia

Department of Mechanical Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran

چکیده

In this paper, nonlinear vibration analysis of functionally graded piezoelectric (FGP) beam with porosities material is investigated based on the Timoshenko beam theory. Material properties of FG porous beam are described according to the rule of mixture which modified to approximate material properties with porosity phases. The Ritz method is used to obtain the governing equation which is then solved by a direct iterative method to determine the nonlinear vibration frequencies of FGP porous beam subjected to different boundary conditions. The effects of external electric voltage, material distribution profile, porosity volume fraction, slenderness ratios and boundary conditions on the nonlinear vibration characteristics of the FGP porous beam are discussed in detail. The results indicate that piezoelectric layers have significant effect on the nonlinear frequencies. Also it is found that the porosity has a considerable influence on the nonlinear frequency and these effects increased especially when the electric voltage is applied.

کلیدواژه ها

Nonlinear Vibration, Porous material, Functionally graded material beam, Piezoelectric layers

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