Dynamic Analysis of Multi-Span Laminated Composite Coated Beams Carrying Multiple Accelerating Oscillators

Abstract

In this paper, the dynamics of a multi-span laminated composite coated beam subjected to a set of accelerating oscillators, by using a coupled finite element-differential quadrature method (DQM), is analyzed. First, using the finite element method, the governing equation of motion of the beam is reduced into a set of ordinary differential equations in time domain. Then DQM is employed to convert these equations together with the governing equations of motion of all moving oscillators into a set of algebraic equations. The efficiency and accuracy of the proposed technique are demonstrated by numerical examples. Furthermore, influence of various parameters such as lamina thickness, orientation of the coats, the number of spans, arrival time intervals, velocities and accelerations of the oscillators on the dynamic behavior of the system are investigated. The technique presented in this investigation is general and can be easily applied to any time-dependent problem.