Development of a Force Identification Method using Component Mode Synthesis and System-level Response

Accurate prediction of excitation forces is essential for ensuring the structural integrity of dynamic systems. However, direct measurement of these forces is often impractical, prompting the development of indirect measurement techniques. This study introduces a novel method for indirectly predicting excitation forces using the Component Mode Synthesis (CMS) technique. The proposed approach derives excitation forces through equations of motion based on a CMS-based reduced-order model.BR/By utilizing system-level responses from only a minimal number of measurement points, the method achieves high prediction accuracy while significantly reducing computational complexity. Validation of the approach was performed using Finite Element Method (FEM) simulations and experimental testing. The results demonstrated strong agreement between theoretical and predicted values across various conditions, confirming the reliability and accuracy of the proposed method. This research presents a practical and efficient methodology for excitation force identification in dynamic systems, with promising potential for application across a wide range of industrial domains.