Composite Structures | 2019
Vibrations of sandwich beams with tip mass: Numerical and experimental investigations
Abstract
Abstract A numerical and experimental investigation of the natural frequencies and frequency response of a cantilevered three-layer sandwich beam carrying a tip-mass is presented. The tip-mass is such that its center of mass is offset from the point of attachment. The higher-order sandwich panel theory (HSAPT) and the Hamilton’s principle are employed in deriving the system governing equations of motion and boundary conditions, which are solved using the generalized differential quadrature (GDQ) method. The obtained results are compared with those obtained from the use of commercial finite element software ANSYS, and they are both experimentally validated. The results are generally in good agreement. Parametric studies are conducted to examine the influence of some design variables on system vibrational behavior.