Fluttering of Flexible Bodies

Abstract

In order to clarify the fluttering behavior of flexible bodies in a stream, the wave form was assumed as y=ax•sin(pt+qx), and from the energy conservation principle, p and q were determined as p=-0.415V√<(ρ/ρ_s; )(b/l)(C_x; +2k₀; )> q=1.6911/l
On the other hand, fabric or film strips were observed in a vertical wind tunnel, and it was shown that the wave form assumed agreed with the observed form within a limited range, and that the frequency calculated from the above-mentioned p could give the rough estimate of the real flutter frequency.
However, the wave form observed was very complicated, and especially so at the tail part of the strip.