M. Shin and G. H. Yoon. Structural and Multidisciplinary Optimization 68:190 (2025) This research employs a topology optimization based on deep reinforcement learning (DRL) technique to design structures for noise reduction. Reinforcement learning (RL) is a type of machine learning in which an agent gradually learns to find the optimized solution through various experie...
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관리자 2025-09-10 76
H. M. Lee, M. J. Park, and G. H. Yoon. Powder Technology 468, 121589 (2026). Granular beds subjected to vertical mechanical vibration become fluidized and exhibit convection patterns, yet the influence of vibration energy input on the convection rate remains underexplored. Here, we demonstrate that a unified energy parameter 𝜀, which encapsulates both velocity and a...
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관리자 2025-09-10 58
Y. D. Yoon and G. H. Yoon. Structural and Multidisciplinary Optimization 68, 86 (2025). This paper presents a novel approach to optimizing the design of structures for controlling particle behavior through the application of Bayesian optimization techniques. Particle behavior is highly sensitive to initial conditions, leading to uncertainty in predicting behavior. ...
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관리자 2025-01-15 481
S. J. Han and G. H. Yoon. International Journal for Numerical Methods in Engineering 126 (1), e7600 (2025). The present study develops a new topology optimization scheme considering the dynamic instability caused by the unsymmetrical properties of system. From a mathematical point of view, the left and right eigenvectors of asymmetric system are observed with the com...
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관리자 2025-01-15 389
D. Y. Kim, M. J. Kim, C. I. Kim, and G. H. Yoon. Measurement Science and Technology (2025). This study develops a looseness detection system of bolted joints using a Variational Mode Decomposition (VMD)-based Nonlinear Transformation (NT) approach combined with a deep residual neural network. Bolted structures are susceptible to loosening due to environmental factors and...
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관리자 2025-01-15 259
Y. H. Choi and G. H. Yoon. Structural and Multidisciplinary Optimization 67 (12), 217 (2024). This research develops a new topology optimization scheme for controlling the trajectory of particles considering contacts between particles and structure. Existing density-based topology optimization schemes struggle with accounting for particlerigid wall contact because of the discontin...
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관리자 2024-08-05 485
J. H. Kim and G. H. Yoon. Journal of Mechanical Design 146.11 (2024). This study presents a novel framework for the optimal design of compliant mechanisms, specifically addressing the structural drawbacks of conventional single-point or de facto hinges. The hinges often lead to structural instability and stress concentration while deriving maximum motion. To overco...
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관리자 2024-08-05 323
L. Long, J. W. Kim, R. Zheng, G. H. Yoon and B. Yi. Computers & Structures 302 (2024): 107479 Multi-material phononic crystals hold promise for manipulating elastic wave propagation, enhancing the rigidity of the host structure, and realizing multifunctionality, including electric conduction, sound insulation, and heat diffusion. This paper presents a multi-material ...
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관리자 2024-08-05 367
G. H. Yoon. Computers & Structures 302 (2024): 107471. This study presents a new topology optimization method for transient two-phase fluid-structure interaction (FSI) problem. From a topology optimization point of view, it is formidable challenging to consider the mutual coupling with structure and two-phase flow and the evolution of sharp interface between two...
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관리자 2024-08-05 296
L. Long, J. W. Kim, G. H. Yoon and B. Yi. Smart Materials and Structures 33.8 (2024): 085013. Destructive interference-based metamaterials have shown excellent characteristics in elastic wave manipulation and vibration attenuation. Nevertheless, challenges persist in the application due to limited space and lightweight design, as current metastructures require additional...
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관리자 2024-08-05 384
Y. H. Choi and G. H. Yoon. Journal of Fluid Mechanics 986 (2024): A9. This study presents a new density filter for a pipe-shaped structure and its application to fluid topology optimization. A simple and straight pipe-shaped structure for fluid is preferred for many engineering purposes rather than the perplex manifold structure provided by the topology optimization meth...
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관리자 2024-08-05 315
D. Y. Kim, Y. J. Woo, S. G. Sim, and G. H. Yoon. Journal of Vibration Engineering & Technologies 12.3 (2024): 3213-3230. Purpose This study presents a nonlinear transformation-based data augmentation approach to diagnose delaminations such as interlaminar, through-hole and buckle, in relatively complex composites. The approach uses tailored vibration signal...
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관리자 2024-03-13 408
H. M. Lee, G. H. Yoon, J. Engqvist, M. Ristinmaa and M. Wallin. Mechanism and Machine Theory 195 (2024): 105605. This study considers deployable structures and presents a novel optimization method that aims to improve the stiffness at the fully deployed state. The considered structures consist of curved beams that deploy through buckling when rotated. The optimization ai...
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관리자 2024-03-13 463
T. Y. Ha and G. H. Yoon. Finite Elements in Analysis and Design 235 (2024): 104138. This study examines the phenomenon of intrinsic nature in wave mitigation, specifically focusing on the concept of destructive interference (DI). When waves interact, they can exhibit either destructive interference or constructive interference depending on the phase difference. In the case of mechanica...
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관리자 2024-03-13 431
H. S. Koh and G. H. Yoon. Structural and Multidisciplinary Optimization 67 (3), 33 This paper proposes a novel technique for large-scale partial topology optimization of dynamic engineering structures by utilizing substructuring techniques and repetitive geometry. Partial topology optimization refers to a design domain that only covers a part of the overall ana...
