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In this work, a linear Kirchhoff-Love shell formulation in the framework ofscaled boundary isogeometric analysis is presented that aims to provide asimple approach to trimming for NURBS-based shell analysis. To obtain a globalC1-regular test function space for the shell discretization, an inter-patchcoupling is applied with adjusted basis functions in the vicinity of thescaling center to ensure the approximation ability. Doing so, the scaledboundary geometries are related to the concept of analysis-suitable G1parametrizations. This yields a coupling of patch boundaries in a strong sensethat is restricted to G1-smooth surfaces. The proposed approach is advantageousto trimmed geometries due to the incorporation of the trimming curve in theboundary representation that provides an exact representation in the planardomain. The potential of the approach is demonstrated by several problems ofuntrimmed and trimmed geometries of Kirchhoff-Love shell analysis evaluatedagainst error norms and displacements. Lastly, the applicability is highlightedin the analysis of a violin structure including arbitrarily shaped patches.

Smooth multi-patch scaled boundary isogeometric analysis for Kirchhoff-Love shells