A substructure energy method for prediction of Space Shuttle modal dampingThe results of this program demonstrate the validity of a dissipative energy approach for predicting the damping of a four-component Space Shuttle model by means of modal parameters obtained from tests of the individual components. A relationship between modal damping energy per cycle and peak strain (or kinetic) energy is first determined empirically from test data for each component. Undamped analytical models of each component are also developed, and combined into a system model from which are obtained modal kinetic (or strain) energies for its respective modes. These data are then used with the empirical damping curves to apportion the proper amount of damping energy to each component in a combined system mode, and thereby allow a prediction of damping ratio.
Document ID
19740043940
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kana, D. D. (Southwest Research Institute San Antonio, Tex., United States)
Unruh, J. F. (Boeing Aircraft Co. Seattle, Wash., United States)
Date Acquired
August 7, 2013
Publication Date
April 1, 1974
Subject Category
Space Vehicles
Report/Patent Number
AIAA PAPER 74-385
Meeting Information
Meeting: Structures, Structural Dynamics and Materials Conference