Dynamic sub-structuring with passive state-space components
Paper i proceeding, 2014

Component synthesis regards modeling of complex dynamic structures by decomposing the structure into smaller simpler components, modeling each component or sub-structure individually and then assemble the components to construct the complete dynamic structure model. The methodology allows for a mixture of experimental and analytical models of sub-structures to be assembled into a coupled system model. There are a number of component synthesis methods that stands at disposal. In this paper we use state-space component synthesis to assemble two state-space sub-components of a test rig. One sub-component model is based on measured frequency response data and the other is based on a Finite Element (FE) modeled component and the coupled structure is validated against reference measurements. The paper also investigates and shows the necessity of physically consistent experimentally derived sub-system models in component synthesis and presents a new methodology for passivity enforcement on state-space models.


A. Liljerehn

Thomas Abrahamsson

Chalmers, Tillämpad mekanik, Dynamik

26th International Conference on Noise and Vibration Engineering, ISMA 2014, Including the 5th International Conference on Uncertainty in Structural Dynamics, USD 2014; Leuven; Belgium; 15 September 2014 through 17 September 2014