Improving Modal Parameter Predictions for Jointed Airframe Panels. Part Ⅰ: Experiments.

摘要

This paper describes a combined experimental ands numerical investigation aimed at identifying the physical mechanisms and modeling errors that are the culprits for the lack of correlation between experimental measurements and analytical predictions of the modal parameters of helicopter airframes. The identification of the major contributors to this lack of correlation is an indispensable first step to actual modification and improvement of modeling processes and tools.