PREDICTED VARIABILITY AND DIFFERENCES BETWEEN TESTS OF A SINGLE STRUCTURE

摘要

Variable models are used to describe structures that change in time, whose properties are not well known, or that are improperly modeled. When the objective of the model is to predict Frequency Response Functions (FRF), variability descriptions typically need to be considered in the physical, modal and FRF parameter spaces. The present study uses simulations of a fairly complex variable finite element model to seek a better understanding of limitations that can be expected in forward and reverse propagation of variability descriptions between those parameter spaces. The finite element model represents the GARTEUR SM-AG-19 testbed so that predicted variabilities can be compared with differences between the test results of participants of this Round-Robin exercise.