Accession Number:

AD0772327

Title:

Dynamic Instability of a Cable in Incompressible Flow,

Descriptive Note:

Corporate Author:

DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V FREIBURG IM BREISGAU (WEST GERMANY)

Personal Author(s):

Report Date:

1973-01-01

Pagination or Media Count:

13.0

Abstract:

The dynamic stability of a cable stretched between two supports is analyzed. The cable is exposed to a uniform, incompressible flow at an angle to the cable axis. Fluid forces are taken to be the quasi-static components of pressure drag and friction drag. Unsteady forces due to vortex shedding are not considered. An instability is found which is wavelike in character and with dominant amplitude at the rear support. The instability is due to the presence of bending stiffness in the cable, an effect previously thought negligible, and not before considered. The flutter occurs at moderate diameters and velocities, but is easily overcome by small amounts of tension. Singular perturbation theory is used to provide estimates of characteristic lengths and period of vibration. Modified author abstract

Subject Categories:

  • Machinery and Tools
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE