ASA 127th Meeting M.I.T. 1994 June 6-10

4pSAa10. The use of a statistical energy analysis to predict spatial distribution response.

Karen Weissman

Jerome E. Manning

Cambridge Collaborative, Inc., 689 Concord Ave., Cambridge, MA 02138-1002

A statistical energy analysis (SEA) response level represents a spatial average over the subsystem and a frequency average over a particular bandwidth. If the SEA response is viewed as a modal amplitude for a given bandwidth, this amplitude can be combined with mode shapes obtained from measured data or a finite element model to map the spatial distribution of the response along the subsystem. This paper documents the development of such a procedure for using SEA to predict the spatial distribution of the response. The procedure is applied to a model of a typical component-loaded panel in a spacecraft. Mode shapes are measured during a shake test on a mock up of the spacecraft panel.