Dynamic Force Reconstruction for Structural Support Platforms Based on the Combined Strategy of Experiment and Simulation

Dynamic force reconstruction theory has been developed for many years, generating numerous effective methods. However, the applications of engineering structures are relatively rare, owing to the difficult experiment, low accuracy and noise disturbance, among others. Aiming at the support platform structure commonly used in engineering, we propose the complete dynamic force reconstruction process based on the direct inversion method in frequency domain. The dynamic calibration methods of experiment and simulation are both analyzed in this case. In order to improve identification accuracy, the Tikhonov regularization is introduced. The results validate the reliability of our proposed method in real scenarios and the necessity of regularization method. Moreover, dynamic load identification method of structural variable stiffness is derived by the four-terminal parameter method. This work provides engineering application-a reference for the engineering of dynamic load identification technology.

Automated summary

This paper proposes a complete dynamic force reconstruction process based on the direct inversion method in frequency domain for the support platform structure commonly used in engineering. Dynamic calibration methods of experiment and simulation are analyzed, and Tikhonov regularization is introduced to improve identification accuracy. The results validate the reliability of the proposed method and the necessity of regularization. Additionally, a dynamic load identification method for structural variable stiffness is derived using the four-terminal parameter method.