A Moment-Fitted Extended Spectral Cell Method for Structural Health Monitoring Applications

The spectral cell method has been shown as an efficient tool for performing dynamic analyses over complex domains. Its good performance can be attributed to the combination of element with mesh-independent geometrical descriptions and adoption customized mass lumping procedures elements intersected by a boundary, which enable it exploit highly efficient, explicit solvers. In this contribution, we introduce use partition-of-unity enrichment functions, so that additional domain features, such cracks or material interfaces, seamlessly added modeling process. By virtue optimal paradigm, time integration algorithms readily applied non-enriched portion domain, allows one maintain fast computing simulations. However, handling enriched remains open issue, particularly respect stability accuracy concerns. addressing this, propose novel in form moment-fitting procedure study its stability. While equations are deployed effort minimize error, issues alleviated deploying leap-frog algorithm solution motion. This approach is numerically benchmarked 2D 3D damaged aluminium components validated comparison experimental scanning laser Doppler vibrometer data composite panel under piezo-electric excitation.