PSI - Issue 57

Sven Maier et al. / Procedia Structural Integrity 57 (2024) 731–742

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S. Maier et al. / Structural Integrity Procedia 00 (2023) 000±000

Fig. 7. Comparison of the frequency response functions in z direction between nominal simulation with measured data (left) and experiment (right) of variant 1 for four sensor positions on the mounting.

In the following, the influence of uncertain scatter of the input parameters on the fidelity of the simulation prediction is investigated. For this reason, the MCS results with the scatter estimated from the literature are compared with a MCS with reduced epistemic uncertainty by using the experimental measured data from Table 3 and Table 4 for the input parameters. This comparison is illustrated in Figure 8 for the most relevant 1st eigenfrequency f 1 and the fatigue lifetime of hotspot 1 for all three variants.

Fig. 8. Comparison between MCS (1200 sample) results with assumed and measured scatter bounds for input parameters. Upper row shows the 1st eigenfrequency f 1 . Lower row shows the durability results for hotspot 1. Variant 1: a) & d), variant 2: b) & e), variant 3: c) & f). The range of experimental results are illustrated by vertical black dotted lines.