Non-linear vibration analysis of a functionally graded Timoshenko beam under action of a moving harmonic load

2010 ◽  
Vol 92 (10) ◽  
pp. 2532-2546 ◽  
Author(s):  
Mesut Şimşek
Keyword(s):  
Timoshenko Beam ◽  
Vibration Analysis ◽  
Functionally Graded ◽  
Harmonic Load ◽  
Linear Vibration ◽  
Non Linear ◽  
Moving Harmonic Load

scholarly journals Nonlinear Dynamic Response of an Axially Functionally Graded (AFG) Beam Resting on Nonlinear Elastic Foundation Subjected to Moving Load

2019 ◽  
Vol 8 (1) ◽  
pp. 250-260 ◽  
Author(s):  
Mehdi Alimoradzadeh ◽  
Mehdi Salehi ◽  
Sattar Mohammadi Esfarjani
Keyword(s):  
Differential Equations ◽  
Dynamic Response ◽  
Nonlinear Vibration ◽  
Natural Frequency ◽  
Nonlinear Dynamic ◽  
Vibration Analysis ◽  
Functionally Graded ◽  
Harmonic Load ◽  
Nonlinear Dynamic Response ◽  
Moving Harmonic Load

Abstract In recent years, structures made of Functionally Graded materials (FGMs) are used in industries due to the continuously compositional variation of the constituents in FGMs along different directions. In order to develop FGMs, nonlinear vibration analysis to study dynamic behavior is needed. This study proposes nonlinear vibration analysis of a simply supported axially functionally graded (AFG) beam subjected to a moving harmonic load as an Euler-Bernoulli beam utilizing Green’s strain tensor. Axial variation of material properties of the beam is based on the power law. The governing equations of motion are derived via Hamilton’s principle. The Galerkin’s method is implemented to reduce the nonlinear partial differential equations of the system to a number of nonlinear ordinary differential equations. He’s variational method is applied to obtain approximate analytical expressions for the nonlinear frequency and the nonlinear dynamic response of the AFG beam. The effect of some parameters such as the power index and stiffness coefficients, among others, on the nonlinear natural frequency has been investigated. The influence of above mentioned parameters as well as the velocity of the moving harmonic load on the nonlinear dynamic response has been studied. The results indicate that these parameters have a considerable effect on both nonlinear natural frequency and response amplitude.

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