Accession Number:

AD0419378

Title:

EXPERIMENTS ON THE FLUTTER OF FLAT AND SLIGHTLY CURVED PANELS AT MACH NUMBER 2.81,

Descriptive Note:

Corporate Author:

CALIFORNIA INST OF TECH PASADENA GRADUATE AERONAUTICAL LABS

Personal Author(s):

Report Date:

1962-06-01

Pagination or Media Count:

72.0

Abstract:

Two series of panel flutter tests were carried out in the Jet Propulsion Laboratorys 12 inch supersonic wind tunnel. Flat and slightly curved panels were tested at Mach number 2.81. The flat, rectangular panels were designed to study two-dimensional flutter. They were clamped at front and rear with free sides which extended into the boundary layer at the sides of the tunnel. These panels flutter in a two-dimen sional mode which occurred at a thickness ratio approximately 15 different from the predictions of existing theory. One of the panels exhibited a three-dimensional rocking flutter which has not been observed or discussed before. A theory is developed for this type of flutter. The slightly curved panels were shallow circular cylindrical shells with the generators perpendic ular to the flow direction. These panels were all of aspect ratio one. It was found that the effect of curvature was destablizing and that the effect of internal pressurization was stabilizing. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE