Substructure analysis of vibration-assisted drilling systems

Designing vibration-assisted drilling (VAD) toolholders requires accurately modeling the dynamics of the mechanical structure and its electromechanical coupling with the piezoelectric actuator. The overall dynamics of the VAD toolholder depends on the dynamics of its individual components (e.g., concentrator, piezoelectric disk, drill bit) and the interactions between them. Modelling by substructure analysis therefore provides an efficient framework for studying the effect of each component on the overall dynamics of the VAD system. Nonetheless, the existing substructure analysis methods are only applicable to holders with basic concentrator geometry, which limits their application in designing high-performance holders.