Simultaneous optimization of stiffener layout of 3D box structure together with attached tuned mass dampers under harmonic excitations

This paper presents a novel and effective design method to improve the structural dynamic performance of 3D box structures subjected to harmonic excitations by combining the stiffener layout optimization with the optimal tuning of attached tuned mass dampers (TMDs). First, the adaptive growth method...

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Bibliographic Details
Published in:Structural and multidisciplinary optimization 2021-08, Vol.64 (2), p.721-737
Main Authors: Shen, Lei, Ding, Xiaohong, Hu, Tiannan, Zhang, Heng, Xu, Shipeng
Format: Article
Language:English
Subjects:
Computational Mathematics and Numerical Analysis
Dynamic response
Engineering
Engineering Design
Excitation
Layouts
Optimization
Parameters
Research Paper
Stiffeners
Theoretical and Applied Mechanics
Vibration isolators
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Summary:This paper presents a novel and effective design method to improve the structural dynamic performance of 3D box structures subjected to harmonic excitations by combining the stiffener layout optimization with the optimal tuning of attached tuned mass dampers (TMDs). First, the adaptive growth method which is based on the growth mechanism of natural branch systems is adopted to optimize the stiffener layout. To break through the obstacle of the adaptive growth method for dynamic response problems, the stiffeners’ material attribute penalty is introduced. Next, an integrated optimization approach is proposed to optimize the box structure and TMDs simultaneously, where the locations and dynamic parameters of TMDs are optimized in every step of stiffener layout optimization. Thus, the interaction between the box structure and TMDs is fully considered to improve the dynamic performance. Numerical examples of typical box structures are presented to validate the proposed method. The optimized stiffener layout is clear and reasonable with explicit geometric parameters, and the panel thickness has a great influence on the stiffener layout. When the stiffener layout and TMDs are optimized simultaneously, the modal strain energy of the box structure is more concentrated compared with that obtained from the non-simultaneous optimization cases. Therefore, the dynamic compliance of the target mode is significantly reduced.
ISSN:1615-147X
1615-1488
DOI:10.1007/s00158-021-02880-9