Flutter Limits of Flexible Thin Webs with a Basic Configuration in High-Speed Flow. 2nd Report. Predicted Effects of Several Influential Factors on the Flutter Limits.

Abstract

Flutter characteristics of flexible webs affected by several influential factors are investigated by the analytical method described in a previous study. The factors include the following : (1) mass ratio, (2) fluid surface friction, (3) presence of nearby wall (s), and (4) web movement. In the region of medium tension/bending-stiffness where progressing waves of lower-order modes dominate, mass ratio and fluid friction have little effects on the flutter speeds and conditions. The web movements, however, have a significant effect in lowering the flutter speeds. Presence of nearby walls causes considerable changes in the flutter speeds and conditions particularly for the ratio of gap to web length below 0.3.