Multiparametric e-NVH analysis of electrical machines using Greedy Proper Orthogonal Decomposition and Double Component Mode Synthesis

This article focuses on optimizing computational efficiency in the analysis of magneto-vibro-acoustic models, particularly when addressing parametric variations introduced by manufacturing imperfections. The computational cost of using the high-fidelity Finite Element Method in such detailed analyses can be significant, especially when multiple scenarios need to be explored. Moreover, a certain degree of accuracy is required in electromagnetic quantities of interest before any accurate vibroacoustic qualitative analysis can be performed. To address this, advanced Reduced-Order Model techniques, such as an enhanced Greedy Proper Orthogonal Decomposition and double Component Mode Synthesis, are developed. These techniques not only reduce computational time but also retain high accuracy in capturing the vibroacoustic response of the system. The proposed approach offers an efficient numerical framework to account for a wide range of manufacturing-induced variations (eccentricities, supply harmonics and mechanical tolerances), making it highly suitable for early-stage design assessment.