Aerospace Testing Expo 2005 North America, Long Beach Convention Center, Long Beach, CA

Authors: Craig Mundt and Gary Quinn
Publication Date: November 8-10, 2005

The correlation of a finite element model to vibration test data is a complex problem. This paper offers an approach to enhance this process by means of optimizing the analytic model to a set of mode shapes and frequencies. Design optimization provided by the GENESIS1 program is used to assist FEM correlation with the objective to automatically match both frequency and shape for all target modes simultaneously. Multiple design variables are used to vary structural stiffness quantities. Mode tracking algorithms are employed to track mode shapes regardless of frequency.