Accession Number : ADP004708

Title :   Structural Damping of Shuttle Orbiter and Ascent Vehicles,

Corporate Author : ROCKWELL INTERNATIONAL DOWNEY CA

Personal Author(s) : Jensen,D. L.

Report Date : NOV 1984

Pagination or Media Count : 14

Abstract : Experimental structural mode damping factor data are presented for an actual full size vehicle structure. These data were obtained from vibration test programs ocnducted during development of the shuttle orbiter vehicle. Results show average values of structural damping factor range from 0.017 to 0.032. Theoretical analysis indicates a primary source of energy dissipation due to air mass displacement is directly dependent on amplitude of motion. An analysis of frictional energy loss develops a relation between viscous damping factor and coulomb friction. The theoretical and analytical development provides a basis for understanding and interpreting the test results. (Author)

Descriptors :   *DAMPING, *SPACECRAFT, DIFFERENTIAL EQUATIONS, EXPERIMENTAL DATA, VIBRATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE