Application of Operating Data Scaling Techniques - IMAC 23

B.Huot, P.Avitabile

Operating deflection shapes are extremely useful in trouble shooting vibration problems. However, operating data is not scaled so it has limited usefulness for further analytical predictions. Scaled modal data, such as that acquired from a modal test using measured frequency response function data, is required for further analytical studies such as Structural Dynamic Modification and Forced Response Simulation. Thus development of scaled shapes from operating data is desirable. Several techniques have been developed over recent years to scale operating data to modal data.

The focus of this paper is to identify and evaluate some of these scaling techniques. Their strengths and weaknesses will be identified and compared, as well as the robustness of each to both good and poor choices in variables necessary for each technique. To determine their validity, these structures will be compared to actual modal data of the structure acquired through the conventional FRF approach.

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In the meantime, e-mail Peter_Avitabile@uml.edu for copy of paper