This paper presents an analytic method of examining the out-of-plane vibrat
ion of continuous curved beam on periodical supports. The orthogonality of
two distinct sets of mode shape functions is derived. The forced vibration
of beam due to moving loads is examined. Two types of moving loads, which a
re concentrated load and uniformly distributed load, are considered. The re
sponse characteristics of beam induced by these loads are investigated as w
ell.