Dynamic Substructuring (DS) is a powerful engineering concept to model and analyze dynamic systems in terms of their components or substructures. For each substructure, several modeling domains can be chosen depending on the component at hand, the targeted analysis, the availability of computational or experimental resources, and perhaps personal preference. The following figure shows a schematic overview of five domains commonly encountered in structural dynamic simulation: the physical, modal, frequency, time, and state-space domain. Arrows indicate some typical (but not all) conversions between the domains.
All domains implement a common system to describe the interface (or boundary) conditions, which allows a user to “hybridize” a substructuring simulation. Virtual Points can model these interfaces and are key to a well-defined model that can further be used for advanced methods in NVH, such as to characterize active components using Blocked Forces independently and apply these to predict the vibroacoustic behavior of coupled structures using Transfer Path Analysis.
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