نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی مکانیک، دانشگاه سیستان و بلوچستان، زاهدان، ایران
2 گروه مهندسی مکانیک، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان، ایران
3 مدیر گروه مهندسی مکانیک گروه مهندسی مکانیک دانشگاه سیستان و بلوچستان
4 گروه مهندسی مکانیک، دانشکده مهندسی، دانشگاه سیستان و بلوچستان، زاهدان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Regarding the necessity of obtaining high-quality resonators in micro-electromechanical systems, recognizing and investigating the parameters that affect the quality factor of micro-structures are essential and inevitable. Thermoelastic damping is a dominant source of damping which has a considerable effect on the quality factor. In micro-electromechanical systems, microplates are used as resonators and radio frequency filters and so on. In this paper, the effect of thermoelastic damping, which is one of the most important factors affecting the quality factor, has been investigated for rectangular micro-plates. The micro-plate is subjected to an electrostatic actuation. Galerkin method has been used to simplify and solve the governing equations. The result is a nonlinear algebraic equation for the quality factors of microplates of general conditions due to thermoelastic damping. Unlike previous researches, the proposed model can directly calculate the quality factor and there is no need of calculating undamped natural frequency. COMSOL multiphysics software is used for finite element simulation. After verification of the proposed model, the effect of various parameters on the quality factor is investigated. The proposed model can also be used to calculate the pull-in instability voltage. The results of the current paper can be used to design micro-electromechanical systems.
کلیدواژهها [English]