AFWAL-TR-87-3069 (VOL. II - MEASUREMENT TECHNIQUES FOR EXPERIMENTAL MODAL ANALYSIS), TECHNICAL REPORT: EXPERIMENTAL MODAL ANALYSIS AND DYNAMIC COMPONENT SYNTHESIS (DEC-1987)

AFWAL-TR-87-3069 (VOL. II - MEASUREMENT TECHNIQUES FOR EXPERIMENTAL MODAL ANALYSIS), TECHNICAL REPORT: EXPERIMENTAL MODAL ANALYSIS AND DYNAMIC COMPONENT SYNTHESIS (DEC-1987)., This technical report presents the theory and practical aspects of acquiring data used in an experimental modal analysis. Always keeping in mind that a modal analysis is an experimental technique to determine the dynamic properties of a system, this report describes the procedures to collect data that can be used in parameter estimation algorithms that estimate natural frequency. damping, and mode shapes. The potential errors are discussed as well as techniques for reducing \"these errors. Several mathematical models for the computation of frequency response functions for single and multiple inputs are presented. Some new considerations in the area of nonlinear vibrations is presented.