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RISS 인기검색어
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- 저자 : 박근수(Geunsoo Park) (검색결과 3 건)
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강춘길,이동민,박근수,Kang, ChoonGil,Lee, DongMin,Park, GeunSoo 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.2
In this paper, we have proposed a separable nose cap and its opening device to protect a seeker's window from aerodynamic heating and to decrease the drag force on missile body. The nose cap should be promptly deployed to secure the view field of seeker when it is needed. This cap consists of two nose cap structures and separation devices such as pyro puller and pusher. The performance of pyro puller was fully verified through analyses and several kinds of operating tests. We can obtain a sufficient confidence level of the pyro puller through many operating tests under various environments.
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신상우(Sangwoo Shin),박근수(Geunsoo Park),성준규(Joonkyu Sung),이명석(Myungsuk Lee),한인환(Inhwan Han) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
There are negative camber settings as a way to improve the vehicle"s cornering performance. Negative camber settings make the roll angle of the vehicle body offset and maintain ground and tires vertically. So, when a car is cornering, a tire can have the maximum area of the ground. In this case, traction is reduced and a severe one-sided wear is concentrated on the inner surface of the tire and ground-touching part. There is tilting mechanism as another way to improve the vehicle"s cornering performance. It is a way to offset the centrifugal force by making the vehicle body tilt inside the direction of rotation. In this case, we needed seperate special bodywork for realizing tilting mechanism. In this study, we will satisfy cornering performance improvement due to the camber angle, traction securement when driving straight and anti one-sided wear of the tire at the same time by applying the advantage of negative camber settings and tilting vehicles. Also, we will realize tilting mechanism without separate bodywork. While maintaining existing suspension method, a wheel hub and a motor are connected to a link and rotation of the motor makes wheel hubs tilt. By generating the operation of the motor and the steering of the vehicle at one time, the operation of the motor makes the steering of the vehicle become the negative camber when cornering and the zero camber when driving straight.
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[미발표]EN12663 적용한 알루미늄 압출 소재 차체 정적 하중시험 평가
최정용(Jeong Yong CHoi),하홍기(Hongki Ha),박근수(Geunsoo Park),이강운(Kangwun Lee) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.5
알루미늄 압출소재의 철도차량 적용으로, 경량화, 생산공정 단축 및 에너지 소비절감 등의 장점으로 알루미늄 압출소재 차량의 비율이 높아지고 있는 추세이다. 국내의 경우 알루미늄 압출소재 적용 차량으로 광주전동차, 대전전동차, KTX-산천 등이 있다. 현재 국내의 알루미늄 압출소재적용 차량들은 국내사양으로 개발된 것으로, 유럽규격(EN, UIC) 으로 개발된 차량은 없는 상황이다. 본 논문은 당사에서 유럽규격 (EN12663)을 적용하여, 개발한 알루미늄 압출소재 차체에 대해 유한요소법을 이용한 구조해석을 바탕으로, 정적 하중시험을 통해 제작된 차체가 충분한 강도와 강성을 확보하고 있는지를 평가하였으며, 시험결과와 구조해석결과의 비교 및 검증을 통해 구조해석의 신뢰성을 평가하였다. 구조해석 및 하중시험에 적용된 하중조건은 EN12663 P-III 조건을 적용하였다. EN12663 specifies the loads vehicle bodies shall be capable of withstanding, identifies how material data shall be used and presents the principles to be used for design verification by analysis. Therefore, in order to fulfill the structural requirements, Hyundai Rotem Company has carried out Finite Element Analysis (FEA) and static load test to verify whether the carbody structure has enough strength to withstand the loads specified by EN12663. Additionally, we were validated the reliability of FEA by comparing load test result with finite element analysis result.
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