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크롤러 크레인에서 붐의 러핑각도에 따른 전도 모멘트와 와이어 로프 장력 사이의 관계
장효필(Hyo Pil Jang),한동섭(Dong Seop Han),한근조(Geun Jo Han) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
An overload limiter is used to prevent the overturning accident of a crawler crane during an operating. Recently the simultaneous measuring method, which measures hoisting load and overturning moment of the crane, is demanded instead of the existing method, which measures load at the end of boom. The simultaneous measuring method is how to conduct the hoisting load and overturning moment as measuring the tension of luffing wire for a driving of boom. To develop this preventing device for an overturning, the relation between the hoisting load and the overturning moment and the tension of luffing wire according to the luffing angle of boom must be numerically defined. In this study, the relation formula is derived between the hoisting load and the tension of wire and between the overturning moment and the tension according to the luffing angle of boom. Next the formula is compensated by application of the deflection of boom that is obtained by conduction the finite element analysis.
이문재(Moon-Jae Lee),한동섭(Dong-seop Han),이성욱(Seong-Wook Lee),한근조(Geun-Jo Han) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.6
The demand of JIB crane is very increasingly as a diversity of ships or bulk vessel, which is equipped with JIB crane, have been recently built in shipbuilding companies. This study is how is the reaction force and the stress of JIB, according to luffing angles in loading through Finite Element Method. Adopted loading is applied a rated load and self-weight. In this study, it focuses on the luffing angle in which JIB crane stably very well.
크롤러 크레인에서 붐의 처짐을 고려한 러핑와이어 장력과 전도모멘트 사이의 관계식 보정
장효필(Hyo-Pil Jang),한동섭(Dong-Seop Han) 한국기계가공학회 2011 한국기계가공학회지 Vol.10 No.4
The crawler crane, which consists of a lattice boom, a driving system, and movable vehicle, is widely used in a construction site. It needs to be installed an overload limiter to prevent the overturning accident and the fracture of structure. This research is undertaken to provide the relation formula for designing the overload limiter as follows: First the relation formulas between the wire-rope tension and the hoisting load or the overturning ratio according to the luffing angle and length of a lattice boom are established. Secondly the derived formulas are corrected by using the compensated angle considering the deflection of boom through the finite element analysis. The stiffness analysis is carried out for 30-kinds of models as a combination of 6-kinds of luffing angle and 5-kinds of length of boom. Finally the shape design of a stick type load cell, which is the device to measure the wire-rope tension, is performed. 5-kinds of notch radius and 5-kinds of center hole radius are adopted as the design parameter for the strength analysis of the load cell.
한동섭(Dong Seop Han),이문재(Moon Jae Lee),한근조(Geun Jo Han) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.4
The demand of JIB crane to handle a container or a bulk in a vessel is increasingly because of the growth of the scale of trade through the sea. This deck crane such as JIB crane is required the weight reduction design because it is installed in the deck of a vessel due to the environment regulation. In this study first we carry out the structural analysis of JIB with respect to the luffing angle of it to calculate the maximum equivalent stress of JIB, and next the optimum design for the weight reduction design of JIB. The thickness in a cross section of JIB is adopted as the design variable, the weight of JIB as the objective function, and the von mises stress as the constraint condition for the optimum design of JIB using the ANSYS 10.0.
김지혜,정용길,허선철 한국동력기계공학회 2018 동력시스템공학회지 Vol.22 No.1
해양플랜트(FPSO, Semi-Rig, Drillship)의 경우 국산화율은 15~20%로 단순 기계장치를 제외한 대부분의 기자재는 수입하고 있는 실정이다. 또한 선박의 전문화, 대형화, 복합화, 고급화 추세로 해양플랜트용 기자재 국산화 기술개발이 요구되고 있다. 본 연구에서는 구조해석 프로그램인 ANSYS를 이용하여 해양플랜트 FPSO에 탑재되는 LBC(Lattice Boom Crane)를 해석하였다. 사용 환경과러핑각도에 따라 조건을 나누었으며, 풍하중의 영향과 좌굴현상을 평가하기 위해 유동해석과 좌굴해석을 실시하였으며, 해양플랜트용 선급규정인API와 ABS의 기준으로 해석 및 분석하였다.