Topology optimization of bearing domains in flexible multibody systems

Topology optimization can be used for optimizing members of flexible multibody systems to enhance different characteristics of these systems. Here, a topology optimization scheme for flexible multibody systems is presented in which a more accurate model of bearing domains is included in the optimization. This is especially of interest since a connection between flexible members in a multibody system using bearings is widely seen in many application. Moreover, the modeling accuracy of the bearing area is shown to be influential on the shape of the optimized structure. As an application example, a flexible slider-crank is optimized here for minimum value of compliance in its nonrigid part. The flexible body is incorporated in the multibody simulation using the floating frame of reference formulation and its elastic deformation is approximated using shape functions calculated in the model order reduction analysis. The bearing loads are incorporated in this framework by introducing a corrector load in the bearing model. The results of the optimization is compared with an equivalent system which is modeled using nonlinear finite elements.

Schlagworte

Bearing model

Flexible multibody system

Topology optimization

DDC Class

530: Physik

600: Technik

620: Ingenieurwissenschaften

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Topology optimization of bearing domains in flexible multibody systems