Numerical Approach to Optimize the Dynamic Behaviour of Structures Considering Structural Durability

Author:

Kaal William1ORCID,Baumgartner Jörg1ORCID,Budnik Maximilian1ORCID,Tamm Christoph1ORCID

Affiliation:

1. Fraunhofer Institute for Structural Durability and System Reliability LBF, 64289 Darmstadt, Germany

Abstract

In the design of lightweight structures, both the dynamics and durability must be taken into account. In this paper, a methodology for the combined optimization of structural dynamics, lightweight design, and lifetime with discrete vibration engineering measures is developed and discussed using a demonstration structure. A two-sided welded bending beam is excited at the centre and optimal parameters for tuned mass dampers (TMD) are searched, satisfying the requirements for the dynamic behaviour, the overall mass, and the lifetime of the weldings. It is shown that the combination of a reduced order model with the implementation of the structural stress approach at critical welds enables an efficient evaluation of certain design concepts in the time domain. Using this approach, multi-criterial optimization methods are used to identify the best set of parameters of the TMD to reduce the structural vibrations and enhance the durability.

Publisher

MDPI AG

Subject

Engineering (miscellaneous),Materials Science (miscellaneous)

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