Inertia effects of Moving Load on Dynamic response ofSandwich Beam with Soft Core

This paper presents analytical study of sandwich beam linear vibration with transversely flexible core under moving mass. In this kind of loading, the effects of moving mass's inertia also should be considered. In order to modelsandwich beam, three-layer wise theory is used for analytical study of vibration of sandwich beam. Classical theory is used for face-sheets and linear polynomial displacement field theory is used for core. Governing equations of vibrationare obtained using Hamilton’s principle. Modal superposition method used to derive ordinary differential equation of motion in matrix form. Fourth order Runge-Kutta method applied to solving the ODE with time varying coefficients.The aim of this paper is to examine core factors such as transverse flexibility (Ez, Gxz) that have an effect on structural reaction of sandwich beam under moving mass.

Keywords:

transversely flexible core , three-layer wise theory , moving mass , transverse stiffness