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MECSOL 2022
8th International Symposium on Solid Mechanics
Topology Optimization of Simplified Actuating Structures subjected to Fluid-Structure Interaction by using the TOBS-GT Method
Submission Author:
Lucas Oliveira Siqueira , SP
Co-Authors:
Lucas Oliveira Siqueira, Anderson Soares da Costa Azevêdo, shahin ranjbarzadeh, Emilio Carlos Nelli Silva, Renato Picelli
Presenter: Lucas Oliveira Siqueira
doi://10.26678/ABCM.MECSOL2022.MSL22-0068
Abstract
Over the years, interest in engineering has grown in materials that can recover and transform their shape. In this context, one of the challenges of topology optimization is to design structures built with these materials considering the rigor of their physics in the finite element procedure. This paper proposes a simplified approach to perform topology optimization of these actuating structures. The Topology Optimization of Binary Structures method with geometry trimming (TOBS-GT) is employed. In the TOBS-GT method, the finite element analysis and optimization modules are decoupled, where the geometry is updated and meshed freely in the FEA software. The structure is considered to actuate within a fluid flow domain, which requires a strongly coupled fluid-structure interaction analysis. The optimization of the actuator considers the minimization of the structural compliance subjected to a volume constraint. A body force is used to simulate an actuation on the structure and acts in the opposite direction to the fluid flow. The fluid flow is considered to be under low Reynolds regime. The algorithm is tested with a bidimensional example of a beam immersed in a fluid channel. The effect of penalty variation on the final topology of structure is verified. Moreover, the influence of body force variation on the final topology is tested. The results show that the TOBS-GT method can be used effectively to optimize structures subjected to fluid-structure interaction and a body force simultaneously.
Keywords
Topology optimization, Integer Linear Programming, body force, actuator
