A hybrid FE-SEA model reduction method to obtain detailed responses at chosen locations from a large launch vehicle model
Published in EUCASS2017, 2017
Innovative Hybrid FE- SEA modeling methods allow stiff structures modeled with finite elements to be coupled directly to more flexible SEA (Statistical Energy Analysis) structures in a combined model. This allows for a reduction of overall model computational time while preserving detail in areas where it is most needed. This case study presents a launch vehicle where a very stiff section was modeled with FE to preserve the critical response information in this section. A method to reduce the SEA structure in the model to just the locally connected structures was implemented, taking advantage of high-frequency responses being highly localized. With this reduced modeling method, comparisons to the full vehicle model show that the result retains its accuracy with only a small part of the total vehicle being modeled.
Recommended citation: Castel, A., Hadjit, R., Calloni, M., America, E.N. and Masini, V.A. (2017). "A hybrid FE-SEA model reduction method to obtain detailed responses at chosen locations from a large launch vehicle model." EUCASS 2017.
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