A rapid CAE-based design method for modular hybrid truss structures

Walbrun, Simon; Witzgall, Christian; Wartzack, Sandro

doi:10.1017/dsj.2019.26

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…Considering the limitations discussed above, we have developed a new heuristic two-level optimization process specifically for stiffened panel layout optimization. There have been other works on two-level optimization using topology optimization, but none on stiffened panel layout or using complexity (Chirehdast & Papalambros 1992; Walbrun, Witzgall, & Wartzack 2019).…”

Section: Introductionmentioning

confidence: 99%

Complexity-driven layout exploration for aircraft structures

Gamache,

Vadean,

Capo

et al. 2023

Des. Sci.

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Topology optimization has been identified as a powerful tool to improve aircraft structures for many years. Yet, innovative layouts have not been successfully implemented in commercial aircraft for several reasons. One reason identified by our research group is the lack of design constraints during topology optimization, such as buckling stability, which yields complex solutions that are not easily manufacturable. Second, the complexity of the resulting layouts makes integration with other systems highly challenging. With respect to these challenges, we propose a new heuristic layout optimization process: complexity-driven layout exploration for aircraft structures (CD-LEAS). The new process addresses the challenges of complexity and nonlinear constraints, such as buckling, in aircraft structure layout optimization. The novelty of CD-LEAS comes from the integration of a relative complexity metric as a driver to navigate the design space efficiently. Two case studies of commonly used stiffened panels are carried out to showcase the performance of the process. The results show that using complexity to navigate an explicit design space allows our process to quickly output a family of simple, light, stiff and buckling-resistant layouts.

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Section: Introductionmentioning

confidence: 99%

Complexity-driven layout exploration for aircraft structures

Gamache,

Vadean,

Capo

et al. 2023

Des. Sci.

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“…This fact allows structures made with clamped joints to be completely reusable (reusing profiles and clamps). The construction of removable and reconfigurable structures is a growing trend in other areas such as modular aluminum systems [ 6 , 7 ] or scaffolding structures [ 8 , 9 ], where they are already being used. However, further development, research and tests are still necessary for commercial solutions to standard steel profiles, such as clamped joints.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Stiffness of Clamped Joints versus Bolted Joints in Steel Structures by Means of Accelerometers and Shaking Table Tests

Cabaleiro

Moutinho

González-Gaya

et al. 2021

Sensors

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This work analyzes the difference in stiffness in a steel laboratory structure using clamped joints or bolted joints and analyzes if the stiffness varies in the same way when the frame is subjected to external dynamic loads that bring the joint materials to their yield strength. To make this comparison, the differences between clamp joint and bolted joint were evaluated using a novel methodology based on the analysis of the structure’s natural frequencies from accelerometers. To perform this comparison, several laboratory tests were carried out on a frame made by clamped joints and the same frame made by bolted joints, using a set of tests on a medium-scale shake table for this purpose. The results achieved have verified the methodology used as adequate.

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