Forced Vibration Analysis of Bimodular Microbeams Based on the Modified Couple Stress Theory

Abstract

Abstract The forced vibration model of bimodular microbeams is studied in this paper based on the modified couple stress theory. The effects of the bimodular characteristic and the size effect are considered in this model. The forced vibration governing equation, boundary conditions, and initial conditions are obtained by Hamilton’s principle. The influence of the bimodular ratio and the material length scale parameters on the time history response are investigated based on the analytical method. Results show that the larger the two parameters, the higher the frequency and the smaller amplitude.