Computationally efficient reduction of modal data from finite element models by nested sets of B-splines

摘要: This paper introduces a novel methodology for the reduction of modal data from complex finite element (FE) models, resulting in highly accurate and computationally efficient model termed B-SAFE (B-spline-based Semi-Analytical Finite Element model). It is conceptually similar to method based on nested sets polynomials proposed earlier by authors (Poly-SAFE) but provides greater accuracy case structures ease use, limiting need user interventions facilitating automated processing. constructed via standard displacement-based FE down semi-analytical function built B-splines recursively fitted data, which eliminates high-order heavy user-intervention required Poly-SAFE patterns. The present work describes non-trivial modifications original methodology, shows how fewer more functions representing field variables such as displacement, strain stress can be obtained. new exemplified through numerical study 9.2 m composite wind turbine blade, showing that improved stability robustness well systematic handling general geometries obtained without intervention.