Development of vibro-acoustic virtual sensing system for pipeline structure using digital twin

In this study, we present the framework of a virtual sensing system for a vibro-acoustic structure. The system can estimate the time-transient responses at the unmeasured points of a vibro-acoustic structure, including displacements, pressures, and applied forces. A coupled vibro-acoustic finite element (FE) model is then used as a numerical model of the target structure, and the model is updated using the sensitivity-based FE model updating technique for vibro-acoustic systems. A multiphysics reduced-order modeling approach is then applied to the model to alleviate the computational burden of real-time computation. Based on the pre-processed FE model, a time integration technique is implemented to estimate the unmeasured responses of the target structure. The performance of the suggested virtual sensing system is finally evaluated by implementation on an L-shaped pipe structure.