### 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.