Dynamic Finite Element Model Correlation by James Winkel, Nov. 8, 2022

Dynamic Finite Element Model Correlation

James Winkel

NASA Langley Research Center

November 8, 2022

Abstract:

A critical task involved with being able to predict flight loads accurately in complex aerospace finite element models (FEMs) is the prior verification of the models by conducting modal survey testing (MST). Experience in comparing the dynamic response of initial un-correlated FEMs to MST data tends to demonstrate that FEMs can have unacceptable accuracy even when best modeling practices are followed. One inherent source of inaccuracy in linear dynamic FEMs is the modeling of joints and interfaces, some of which exhibit non-linear behavior. The focus of this discussion will be trying to guide the listener through the critical items to consider when preparing to undertake the correlation of a finite element model using MST data. Examples will be presented of some of the common issues and over-looked items that make model correlation more difficult than necessary. Finally, a discussion on potential approaches to best approximate localized non-linear behaving interfaces in the linear finite element models will conclude the presentation.

Biography:

James has worked at NASA for over 12 years, specifically in the fields of structural dynamic testing and finite element correlation. He has had the opportunity to test and correlate hardware for Orion, SLS, and the Boeing Starliner, as well as others NASA programs, such as the X57 Maxwell electric aircraft. He received his bachelor’s degree in Aerospace Engineering from Wichita State University in Wichita, Kansas and later his master’s degree from Purdue University. He lives in Virginia Beach with his wife Danielle and two dogs. He was fortunate enough growing up to be able to work in the family manufacturing business where he developed a passion for understanding how various equipment works and most importantly how structures react to unplanned/unexpected loads (education is expensive no matter how you get it).