EXPERIMENTAL INVESTIGATIONS ON FREE VIBRATION OF BEAMS

Abstract

In this article experimental investigation of the natural frequency, damping ratio and damping constant of beams in different material i.e. steel, aluminium, copper with different boundary conditions like Clamped-free, Clamped-clamped, clamped-simply support, Simply support-simply support, and free-free(by using sponge, and by using rubber band) has been investigated. Natural frequencies obtained using accelerometer, NI-DAQ (9234), and NI-DAQ chassis (9137),and LABVIEW and MATLAB. Then the main objective of this paper is to provide experimental data that can be used for checking the accuracy and reliability of different theories and approaches like analytical, finite element method by using MATLAB and ANSYS. The effects of different geometrical parameters including density are discussed in above mentioned all boundary conditions in details with up to first 3 natural frequencies. This study may provide valuable information for researchers and engineers in design applications.