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배징도(Jing-Do Bae),조진래(Jin-Rae Cho),이홍우(Hong-Woo Lee),송정인(Jung-In Song),이진규(Jin-Kyoo Lee) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4
In-arm type hydropeumatic suspension unit(ISU) is an equipment of armed tracked vehicle to absorb impact load and vibration from the irregular ground. During the operation of ISU, main piston moves forward and backward and oil flowing through damper transmits the external impact load to floating piston. Heat is generated in ISU by the oil pressure drop through the damper orifice and the friction between cylinder wall and two pistons. On the other hand, internal heat dissipatis outside via heat convection. Occurrence of high temperature can deteriorate durability of major components and basic function of ISU. And, it can cause fatal problem in the ISU life time and the sealing performance of piston rings. As well, the spring constant change of nitrogen gas that is caused by the temperature rise exerts the negative effect to the vehicle stability. Therefore, in this paper, we analyze the heat transfer analysis of the entire ISU unit, by finite element method, with the outside flow velocities 8㎧ and 10㎧.
육상시추 시스템용 방향제어 추진체의 수치해석 기법 분석
김승찬(Seung-Chan Kim),배징도(Jing-Do Bae),최주형(Joo-Hyoung Choi),김정환(Jeong-Hwan Kim),장석수(Suk-Soo Jang),김민규(Min-Kyu Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
The most important part of the directional drilling is the transition from vertical drilling to horizontal drilling. This is possible due to continuous development of various control systems and stability of drilling equipment. Directional drilling equipment performs drilling, including mud system. In this study, structural stability is analyzed prior to the development of directional drilling. this study intend to analyze the numerical analysis cases that can be evaluated to establish the scope of application for future developments.
전산해석을 이용한 Telescopic Bridge의 구조안정성 평가 및 설계 보강
김한울(Han-Ul Kim),배징도(Jing-Do Bae),이재훈(Jae-Hoon Lee),최주형(Joo-Hyung Choi),최영삼(Young-Sam Choi),조용원(Yong-Won Cho) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
In this research, design reinforcement and structural stability evaluation of a telescopic bridge are introduced which is used for transferring people and supplies safely between OSV and offshore plants. Analysis cases were selected considering classification rules(DNV-GL) and computational analyses were performed. According to the analysis result, researched proper design reinforcement by checking weak parts and tried to reinforce design effectively.