The aim of this work is to examine the influence
of some structural parameters, namely, the mass per unit
length and flexural rigidity of the upper beam on the natural
frequencies of a symmetric non-prismatic double-beam system
elastically connected by a Pasternak-type layer. A semianalytical
technique known as differential transform method
was used to carry out the analysis of the vibration problem in
this paper. The results of the analysis revealed that there is
tendency to lower the vibration frequency of the double-beam
system by increasing the mass of the upper beam. It was also
found that the natural frequencies of the double-system
generally increase with an increase in the flexural rigidity of
the upper beam of the double-beam system. It can be
concluded that both the mass per unit length and the flexural
rigidity of the upper beam generally have influence on the
natural frequencies of a non-prismatic double-beam system
elastically coupled by a Pasternak-type elastic mediu