Smart Structures and Systems

  • 제11권3호
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  • Pages.241-259
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  • 2013
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Numerical characterizations of a piezoelectric micromotor using topology optimization design

  • Olyaie, M. Sadeghbeigi (Mechanical Engineering Department, Amirkabir University of Technology) ;
  • Razfar, M.R. (Mechanical Engineering Department, Amirkabir University of Technology)
  • 투고 : 2012.03.06
  • 심사 : 2012.08.17
  • 발행 : 2013.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents the optimum load-speed diagram evaluation for a linear micromotor, including multitude cantilever piezoelectric bimorphs, briefly. Each microbeam in the mechanism can be actuated in both axial and flexural modes simultaneously. For this design, we consider quasi-static and linear conditions, and a relatively new numerical method called the smoothed finite element method (S-FEM) is introduced here. For this purpose, after finding an optimum volume fraction for piezoelectric layers through a standard numerical method such as quadratic finite element method, the relevant load-speed curves of the optimized micromotor are examined and compared by deterministic topology optimization (DTO) design. In this regard, to avoid the overly stiff behavior in FEM modeling, a numerical method known as the cell-based smoothed finite element method (CS-FEM, as a branch of S-FEM) is applied for our DTO problem. The topology optimization procedure to find the optimal design is implemented using a solid isotropic material with a penalization (SIMP) approximation and a method of moving asymptotes (MMA) optimizer. Because of the higher efficiency and accuracy of S-FEMs with respect to standard FEMs, the main micromotor characteristics of our final DTO design using a softer CS-FEM are substantially improved.

키워드

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피인용 문헌

  1. Design and evaluation of an experimental system for monitoring the mechanical response of piezoelectric energy harvesters vol.22, pp.2, 2018, https://doi.org/10.12989/sss.2018.22.2.133
  2. Topology optimization of multiphase elastic plates with Reissner-Mindlin plate theory vol.22, pp.3, 2013, https://doi.org/10.12989/sss.2018.22.3.249