STUDY OF SQUEEZE FILM DAMPING IN A MICRO-BEAM RESONATOR BASED ON MICRO-POLAR THEORY

Authors

  • MINA GHANBARI MECHANICAL ENGINEERING DEPARTMENT SAHAND UNIVERSITY OF TECHNOLOGY SAHAND NEW TOWN, EAST AZARBAYJAN,TABRIZ - IRAN
  • SIAMAK HOSSAINPOUR MECHANICAL ENGINEERING DEPARTMENT SAHAND UNIVERSITY OF TECHNOLOGY SAHAND NEW TOWN, EAST AZARBAYJAN,TABRIZ - IRAN
  • GHADER REZAZADEH MECHANICAL ENGINEERING DEPARTMENT FACULTY OF ENG. URMIA UNIVERSITY, URMIA - IRAN

Abstract

IN THIS PAPER, SQUEEZE FILM DAMPING IN A MICRO-BEAM RESONATOR BASED ON MICROPOLAR THEORY HAS BEEN INVESTIGATED. THE PROPOSED MODEL FOR THIS STUDY CONSISTS OF A CLAMPED-CLAMPED MICRO-BEAM BOUNDED BETWEEN TWO FIXED LAYERS. THE GAP BETWEEN THE MICRO-BEAM AND LAYERS IS FILLED WITH AIR. AS FLUID BEHAVES DIFFERENTLY IN MICRO SCALE THAN MACRO, THE MICRO-SCALE FLUID FIELD IN THE GAP HAS BEEN MODELED BASED ON MICROPOLAR THEORY. EQUATION OF MOTION GOVERNING TRANSVERSE DEFLECTION OF THE MICRO- BEAM BASED ON COUPLE STRESS THEORY AND ALSO NON-LINEAR REYNOLDS EQUATION OF THE FLUID FIELD BASED ON MICROPOLAR THEORY HAVE BEEN NON-DIMENSIONALIZED, LINEARIZED AND SOLVED SIMULTANEOUSLY TO CALCULATE THE QUALITY FACTOR OF THE SQUEEZE FILM DAMPING. THE EFFECT OF MICROPOLAR PARAMETERS OF AIR ON THE VALUES OF QUALITY FACTOR HAS BEEN INVESTIGATED. THE QUALITY FACTORS OF THE SQUEEZE FILM DAMPING FOR DIFFERENT VALUES OF NON-DIMENSION LENGTH OF THE BEAM, SQUEEZE NUMBER AND NON-DIMENSION PRESSURE HAVE BEEN CALCULATED AND COMPARED TO THE OBTAINED VALUES OF QUALITY FACTOR BASED ON CLASSIC THEORY.

Author Biographies

MINA GHANBARI, MECHANICAL ENGINEERING DEPARTMENT SAHAND UNIVERSITY OF TECHNOLOGY SAHAND NEW TOWN, EAST AZARBAYJAN,TABRIZ - IRAN

PH.D. STUDENT

MECHANICAL ENGINEERING DEPARTMENT
SAHAND UNIVERSITY OF TECHNOLOGY
SAHAND NEW TOWN, EAST AZARBAYJAN,TABRIZ - IRAN

SIAMAK HOSSAINPOUR, MECHANICAL ENGINEERING DEPARTMENT SAHAND UNIVERSITY OF TECHNOLOGY SAHAND NEW TOWN, EAST AZARBAYJAN,TABRIZ - IRAN

ASSOCIATE PROFESSOR
MECHANICAL ENGINEERING DEPARTMENT
SAHAND UNIVERSITY OF TECHNOLOGY
SAHAND NEW TOWN, EAST AZARBAYJAN,TABRIZ - IRAN

GHADER REZAZADEH, MECHANICAL ENGINEERING DEPARTMENT FACULTY OF ENG. URMIA UNIVERSITY, URMIA - IRAN

PROFESSOR

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Published

2015-01-22

Issue

Vol 12, No 01 (2015)

Section

Articles

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