D. Y. Kim, Y. J. Woo, S. G. Sim, and G. H. Yoon. Journal of Vibration Engineering & Technologies (2023): 1-18. 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 signals of ...
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관리자 2024-01-12 31
K. H. Kim and G. H. Yoon. Structural and Multidisciplinary Optimization 66, no. 6 (2023): 1-27. In this study, we explore the feasibility of the artificial neural network (ANN) model in the inverse problem that determines the voltage condition for implementing a desired deformation of the dielectric elastomer actuator (DEA). Our main focus is on the effectiveness of two ...
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관리자 2024-01-08 38
S. J. Han, D. H. Kim, and G. H. Yoon. Journal of Low Frequency Noise, Vibration and Active Control 42, no. 2 (2023): 935-951. In this study, an optimized dynamic vibration absorber (DVA) was applied to improve the sound absorption performance and simultaneously attenuate vibrations and structure-borne noise at multiple frequencies. As the size parameters and eigenfrequencies of a DVA demons...
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관리자 2024-01-08 33
J. Shin, Y. Kim, D. Y. Kim, G. H. Yoon, and T. Seo. International Journal of Precision Engineering and Manufacturing (2023): 1-16. Overcoming stairs is an important requirement for mobile robots. Therefore, many studies have been conducted to develop robots with novel stair-climbing mechanisms. A curved-spoke-based stair-climbing robot has been developed to overcome stairs, but had some lim...
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관리자 2024-01-08 39
H. M. Lee, D. Y. Kim, T. H. Kim, J. H. Kim, S. G. Sim, J. Moon, H. Kim, Y. Choi, and G. H. Yoon. Experimental Mechanics 63, no. 3 (2023): 415-427. Background The Japanese invasion of the Korean peninsula lasted from 1592 to 1598, where Japan had the upper hand in infantry warfare based on superior firepower. The representative portable personal firepower weapons were the Japanese Tanegashim...
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관리자 2024-01-08 20
G. H. Yoon. Computer Methods in Applied Mechanics and Engineering 403 (2023): 115729. This study presents a new topology optimization method for transient coupled fluid–structure interaction (FSI) problems. The transient FSI problem is formulated using the monolithic design approach combining the design variables and the governing equations. This new approach allows for the possibilit...
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관리자 2024-01-08 35
B. Yi, G. H. Yoon, R. Zheng, L. Liu, D. Li, and X. Peng. Computers & Structures 282 (2023) 107041. Topology optimization is one of the engineering tools for finding efficient design. For the material interpolation scheme, it is usual to employ the SIMP (Solid Isotropic Material with Penalization) or the homogenization based interpolation function for the parameteriza...
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관리자 2023-12-27 30
T. Phuor and G. H. Yoon. International Journal for Numerical Methods in Engineering (2022). In this paper, a novel algorithm for computing the derivatives of eigensolutions of asymmetric damped systems with distinct and repeated eigenvalues is developed without using second-order derivatives of the eigenequations, which has a significant benefit over the existing publish...
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관리자 2023-12-27 37
M. Shin, and G. H. Yoon. Computational Mechanics 70, no. 5 (2022): 993-1011. This research develops a new acoustic topology optimization scheme with a model order reduction called the Multifrequency Quasi Static Ritz Vector (MQSRV) method which effectively reduces the size of the system matrix for the calculating responses as well as sensitivity values in frequency domain. Computing the acc...
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관리자 2023-12-27 30
H. M. Lee, D. H. Kim, D. Y. Kim, M. S. Kim, J. Park, and G. H. Yoon. Composite Structures 295 (2022): 115755. In the present study, composite sandwich structures were investigated to evaluate the effects of porous foams and surface patterns on structural stability and mass reduction of the composite sandwich structures. The composite structures used in the experiments consisted of...
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관리자 2023-12-27 42
H. S. Koh, D. Y. Shin, and G. H. Yoon. International Journal of Impact Engineering 166 (2022): 104238. This research develops a new formulation for final penetration depth of projectile on granular material. Although several relevant researches exist to estimate final penetration depths of blunt projectiles, estimation of final penetration depth of sharp projectiles is still difficult. Dire...
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관리자 2023-12-27 48
D. Y. Kim, Y. J. Woo, K. Kang, and G. H. Yoon. Mechanical Systems and Signal Processing 172 (2022): 108914. This paper develops a new nonlinear transformation-based augmentation method for Convolutional Neural Network (CNN) approach with vibration signals of simple, small scale and elementary reference models for the classification or prediction of vibration signals of perplex healthy or da...
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관리자 2023-12-27 17
J. W. Kim and G. H. Yoon. Engineering Optimization 54, no. 4 (2022): 651-664. The present study presents the application of a structural optimization scheme for a Double Split Hollow Sphere (DSHS) based acoustic cloaking structure for irregular surfaces. For acoustic wave cloaking, many scientific devices utilizing phase differences have been developed. Considering the irregular surfaces of...
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관리자 2023-12-27 18
G. H. Yoon. Computer Methods in Applied Mechanics and Engineering 393 (2022): 114696. This study develops a new topology optimization scheme using coupled forward and coupled sensitivity analyses to manipulate and control time-varying particle trajectories in transient laminar flow, that is transient fluid–particle assemblies. It is an important scientific and engineering subject to m...
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2022 [115] Effect of Dynamic Loading Conditions on Maximizing Energy Dissipation of Metallic Dampers관리자 2023-12-27 39
J. W. Park, J. H. Yoon, G. H. Yoon, and Y. M. Lim. Applied Sciences 12, no. 6 (2022): 3086 Diversification of the optimum designs is practical for metallic dampers due to their advantages of low cost, stability, and ease of fabrication. Therefore, this paper presents a novel approach—dynamic optimization—to derive various optimum shapes of metallic dampers th...
