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Item type:Publication, Access status: without files , Influence of Weighted Gradients in Topology Optimization of Flexible Multibody SystemsThis paper deals with a level set-based topology optimization of flexible bodies within flexible multibody systems. The required gradient is provided by an adjoint sensitivity analysis. In this work, a modified Solid Isotropic Material with Penalization (SIMP) method is applied, which helps to avoid numerical issues connected to spurious modes in dynamic problems. Nevertheless, the included parametrization factors lead to a weighted gradient. To test the validity of corresponding optimization results, differently weighted gradients are then used within the topology optimization of a flexible piston rod in a slider-crank mechanism. The obtained results show, among others, the range of appropriate weightings in the studied example.Publicationtype: Conference Paper67 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , On level set-based topology optimization of flexible multibody systems(2024); Publicationtype: Doctoral Thesis76 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Adjoint sensitivity analysis of flexible multibody systems in differential-algebraic form(2020-02); ; In the analysis and optimization of flexible multibody systems, an efficient sensitivity analysis can be performed using the adjoint variable method. Thereby, the procedure strongly depends on the equations of motion, which can be formulated either by minimal or by redundant coordinates yielding in turn a system of ordinary or differential-algebraic equations. In the current work, redundant coordinates are used to set an adjoint system for the sensitivity analysis of flexible multibody systems with kinematic loops, which are modeled using the floating frame of reference formulation. The procedure is tested by computing the structural gradient for the flexible crank of a slider-crank mechanism and compared with a reference procedure, where the adjoint system is formulated using minimal coordinates.Publicationtype: Journal Article106 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Topology optimization of flexible multibody systems using a parametrized level set methodPublicationtype: Conference Paper95 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Adjoint variable method for the sensitivity analysis of flexible multibody systems in differential-algebraic formPublicationtype: Conference Paper87