Analysis on dynamic characteristics of periodic hollow beam

PDF(1149 KB)

Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (14) : 122-126.

论文

Analysis on dynamic characteristics of periodic hollow beam

Chen Rong, Wu Tian-xing

Author information +

History +

Abstract

A hollow beam, whose internal is periodically excavated, is designed to gain excellent band-pass and band-stop characteristics in the mid and high frequency domain. The hollow beam is composed of two Timoshenko beams periodically connected by n rigid joints. Longitudinal vibration mobility of rod and bending vibration mobility of Timoshenko beam are derived, vibration mobility of rigid joints are given. Force transfer rate and frequency of band gap are calculated by transmission matrix method. Numerical simulation result shows that displacement response of the periodic hollow beam and the force transmitted to the constraints of the beam will be greatly attenuated when the excitation frequency is located within the stop-band of the periodic hollow beam.