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이중펄스 로켓모타의 격막형 펄스분리장치 설계 및 성능평가
김진용,권태하,이원복,조원만,이방업,정규동,이영우,Kim, Jinyong,Kwon, Taeha,Lee, Wonbok,Cho, Wonman,Lee, Bangeop,Jung, Gyoodong,Rhee, Youngwoo 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.1
The dual pulse rocket motor(DPRM) distributes the propellant energy effectively via pulse separation device(PSD) to improve the range and terminal velocity of the missile. There are two types of PSD such as bulk head type and thermal barrier type. A subscale thermal barrier type DPRM was designed, manufactured, and tested. The results showed good understanding of the characteristics of the PSD and will be applied to the design of the full scale DPRM.
김진용(Kim Jinyong),김성보(Kim Sung Bo) 대한토목학회 2011 대한토목학회논문집 A Vol.31 No.2A
이 연구에서는 압축력을 받는 강재 조립 기둥의 좌굴 거동에 대한 매개변수 해석을 수행하였다. 압축력을 받는 조립기둥에서 기둥 전체 길이에 설치되는 H-형강 단면의 주 부재와 H-형강의 상 · 하 플랜지를 연결하는 배튼의 휨 및 전단력에 의한 전단변형효과를 고려한 좌굴하중 식을 제시하였다. 조립기둥의 길이, H-형강 주부재의 간격, 배튼의 개수, 배튼 작용을 하는 상 · 하 덮개판의 설치 여부에 따른 좌굴하중의 변화를 분석하였다. 일반 볼트 및 고장력 볼트가 사용된 조립 기둥의 설계에 사용되는 AISC 설계식이 배튼 및 주 부재의 간격이 큰 조립 기둥에도 활용할 수 있는지에 대한 적용성을 검토하였다. 이 연구에서 제시한 엄밀해 그리고 보요소 및 판요소를 사용한 유한요소해석 그리고 AISC의 설계식에 의한 결과를 비교 · 분석하여 강재 조립기둥의 좌굴거동에 대한 매개변수 해석을 수행하였다. The parameter study of buckling behavior of steel built-up column under compression force is presented in this study. The shear deformation effects due to the bending moment and shear forces are considered for the H-shaped main members along the entire built-up column and batten member connecting double H-shaped main members. The parametric study is performed according to the length of the built-up column, the distance of the H-shaped main members and the number and type of cover plate for battens, respectively. The applicability of AISC design specification of normal and high tension bolted built-up colwnn is investigated. The buckling loads for built-up colwnns are compared with those obtained from the analytic solution developed in this study, AISC specification, and finite element method based on the beam and plate element, respectively.
실차 운전자 거동 측정 시스템 개발 및 도로별 운전부하 분석
김진용(Jinyong Kim),정창현(Changhyun Jeong),우진명(JinMyung Woo),정민지(MinJi Jeong),정도현(Dohyun Jung) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Recently, the automotive technology has developed with electronics and information technology as convergence technology while vehicles had been regarded as machines. Moreover, vehicles are becoming more intelligent and safer devices, assembly of advanced technologies by customers’ demand. Even though all of installations of vehicle have attracted as diverting devices, it cause drivers’ mistakes like delay of response on traffic condition. Here, we proposed the Field Operational Test (FOT) environment which could be used as driving and road conditions collector for researches about Driver Friendly Intelligent System, Human Vehicle Interface and Economic Drive Model. Tendencies of drivers were analyzed by measured data and driving workload of classified road.
하이브리드 변속기 밸브바디의 압력, 온도 변화에 따른 윤활오일유량 분배 특성 연구
김진용(Jinyong Kim),나병철(Byungchul Na),조승범(Seungbeom Cho),심재경(Jaekyung Shim),최현주(Hyunju Choi),박승욱(Seunguk Park) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In general, a valve body of the automatic transmission (AT) is controlled by the clutch, the brake and lubricating oil flow in a hydraulic system and lubricant flow for each valve can be adjusted independently. To increase the lifetime of AT, the lubrication flow rate in a valve body for a 6 speed AT based parallel hybrid electric vehicle must be provided with proper oil distribution and control. In this study, we carried out several experiments without the inner parts of AT and with a AT assembly. The variation of the flow rate on oil temperature and pressure between an oil supply port and the outlets of the lubrication port was evaluated and analyzed. In the case of AT without the inner parts, it was evident that as the oil required for an operation of the clutch and brake was discharged from the outlet port, the flow rate from each lubrication port is decreased. However, the flow rate of the AT assembly was slightly increased. In addition, the lubrication flow rate was increased with increasing the oil temperature, and also it was reduced with increasing the oil pressure. Details of the resulting data are discussed.
Al(OH)<SUB>3</SUB>와 Sb<SUB>2</SUB>O<SUB>3</SUB>의 첨가에 따른 EPDM계 고무의 난연성 향상 연구
김진용(Jinyong Kim),이원복(Wonbok Lee),임대현(Daehyun Lim),서혁(Hyuk Suh),이영우(Youngwoo Rhee) 한국추진공학회 2009 한국추진공학회 학술대회논문집 Vol.2009 No.11
EPDM(Ethylene-propylene diene monomer)계 고무의 난연성 향상을 위하여 무기계 난연재료인 Al(OH)3와 Sb2O3를 첨가하여 물성 및 열적 특성을 조사하였다. 각 시편의 물성은 큰 차이를 보이지 않았으나, 난연재료의 함량이 증가할 수 록 비중과 경도는 높아지는 반면에 신율은 낮아지는 경향이 있었다. 본 연구에서는 열분석과 난연성 시험을 실시하였고, 결과적으로 난연재료의 함량이 10phr 이상에서는 난연 효과가 확연히 나타나는 것으로 판단되었다. In order to improve incombustibility of EPDM(Ethylene propylene diene monomer)-based rubber, inorganic materials as Al(OH)3 and Sb2O3 were added. The mechanical and thermal properties have been measured for vulcanized rubber loaded with different concentrations of Al(OH)3 and Sb2O3. As inorganic material contents increases from 5phr to 30phr, the specific gravity and hardness increase while elongation at break decreases. This study performed incombustibility test and thermal analysis through TGA(Thermogravimetric Analyzer). As a results, incombustible and thermal properties of EPDM-based rubber were improved as Al(OH)3 and Sb2O3 contents increase.
김진용(Jinyong Kim),권태하(Taeha Kwon),이원복(Wonbok Lee),조원만(Wonman Cho),이방업(Bangeop Lee),정규동(Gyoodong Jung),이영우(Youngwoo Rhee) 한국추진공학회 2014 한국추진공학회 학술대회논문집 Vol.2014 No.5
이중펄스 로켓모타는 두 개의 펄스모타 사이에 격벽 또는 격막을 통하여 1단 펄스모타 연소 후 2단 펄스모타가 연소하는 방식으로 일회성 추력 방식이 아닌 효율적으로 이중추력을 조절한다. 이러한 추력 배분을 통하여 사거리와 종말속도를 증가시켜 미사일의 기동성 및 사거리를 향상시킨다. 본 연구에서는 격막 펄스분리장치를 직경 000mm급 이중펄스모타에 설계하였으며 지상연소시험을 통하여 분석하였고, 결과적으로 펄스분리장치의 파열 특성을 파악할 수 있었다. Dual pulse rocket motor(DPRM) has a rocket motor with different pulse grains divided by a pulse separation device(PSD) such as a fragile bulkhead or a thermal barrier type. It distributes thrust energy very effectively via pulse separation device to improve range and terminal velocity of a missile. This paper contains the thermal barrier design and experimental analysis through ground firing tests of 000 mm diameter dual pulse motors. The results showed good understanding of the characteristics of the PSD and will be applied to the design of the full scale DPRM
Design and Optimization of linear motor using Halbach Magnet Array with T shape magnets
Jinyong Kim(김진용),Hyunuk Kim(김현욱),Soo-Hun Lee(이수훈),Moon G. Lee(이문구) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
HMA (Halbach magnet array) is the sum of vertical magnets and horizontal magnets while the conventional magnet array only has vertical magnets. Conventional studies on the linear motor with HMA have been tried to increase driving force and to reduce force ripple. In the study of Lee [1], the author suggests HMA with trapezoidal magnet array. The magnet array has high mean force and low ripple. But there are problems. First, it is very difficult to make the trapezoidal shape of magnet. And the assembly of the array is difficult. In this paper, we suggest HMA linear motor with “T” shape magnets. There are advantages with the magnet array. Firstly, compared to trapezoidal magnet, it is easy to manufacture. Second, it is easy to assemble the magnet array. Based on the SQP (Sequential Quadratic Programming) method, we propose a optimized linear motor with HMA using “T” shape magnets. The linear motor has large force and small ripple.