Quasi Static Investigation of Squeeze Film Damping on a Fully Clamped Micro-Beam
Publish place: 18th Annual Conference of Mechanical Engineering
Publish Year: 1389
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISME18_230
تاریخ نمایه سازی: 1 تیر 1389
Abstract:
In this article a clamped-clamped type micro beam has been considered in an interaction with a thin film of air underneath the beam and its dynamic characteristics such as natural frequency and damping ratio have been discussed. Most important priority is to solve the dynamic motionof the beam due to electrical actuation considering pressure distribution of air within the gap. So a distributed model for both flexural deflection and pressure distribution has bean considered using Euler- Bernoulli beam model and ideal gas Reynolds equation. In that way a set of coupled nonlinear partial differential equations have been obtained that must be solved simultaneously. Because there is no analytic solution for any of equations some simplifications have been considered to linearize both of them. Assuming the actuation voltage to be compound of a finite DC component and an infinitesimally low AC component the quasi static conditions took place and the equations became linear. Application of Galerkin based reduced order model mass, spring and damping matrixes has been found so root locus, frequency and damping ratio diagrams of the system have been plotted and discussed in terms of some defined dimensionless parameters that are very reasonable and useful in designof MEMS.
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Authors
Ali Asghar keyvani
Ms Student, Tabriz University/Mechanical Engineering Faculity, & Research Center for Pharmaceutical Nano
Rasool shabani
Assistant professor, Urmia University/ Mechanical Engineering Department
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