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Comparison of Improved Explicit Method and Predictor Correct α-Method
권민호,정우영,Kwon, Min-Ho,Jung, Woo-Young Korean Society for Advanced Composite Structures 2012 복합신소재학회논문집 Vol.3 No.4
Dynamic application lower mode response is of interest, however the higher modes of spatially discretized equations generally do not represent the real behavior. Some implicit algorithms, therefore, are introduced to filter out the high-frequency modes. The objective of this study is to introduce the P-method and PC ${\alpha}$-method to compare that with dissipation method and Newmark method through the stability analysis and numerical example. PC ${\alpha}$-method gives more accuracy than other methods because it based on the ${\alpha}$-method inherits the superior properties of the implicit ${\alpha}$-method. In finite element analysis, the PC ${\alpha}$-method is more useful than other methods because it is the explicit scheme and it achieve the second order accuracy and numerical damping simultaneously.
권민호(Min-Ho Kwon),한국인(Kook-In Han),박준성(Jung-Sung Park),최세완(Se-Wan Choi) 전력전자학회 2013 전력전자학회 논문지 Vol.18 No.4
This paper proposes an isolated bidirectional three-phase push-pull dc-dc converter for high power application such as eco-friendly vehicles, renewable energy systems, energy storage systems, and solid-state transformers. The proposed converter achieves ZVS turn-on of all switches and volume of passive components is small by an effect of three-phase interleaving. The proposed converter has identical switching pattern for both boost and buck mode, and therefore can provide seamless characteristic at the mode transition. A 3kW prototype of the proposed converter has been built and tested to verify the validity of the proposed operation.
순수비틀림을 받는 비틀림 설계되지 않은 철근콘크리트 보의 비틀림 거동에 대한 연구
권민호 ( Kwon Min-ho ),김진섭 ( Kim Jin-sup ),정영석 ( Jeong Yeong-seok ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
This study investigates whether the crack torsional moment equation of the concrete structure criterion can be applied even when the criterion for the minimum torsional reinforcement amount and spacing is not satisfied. As a result of the experiment, it was found that when the interval of the closed stirrup is wide, it does not satisfy the crack torsion moment induced by the thin-wall theory. However, when the strength reduction factor of 0.75 is applied, the torsional moment criterion is satisfied. Therefore, it is considered that the torsional moment can be considered even if the criterion for the minimum rebar spacing is not satisfied.