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한국기계기술학회지 [Journal of the Korean Society of Mechanical Technology]

간행물 정보
  • 자료유형
    학술지
  • 발행기관
    한국기계기술학회 [Korean Society of Mechanical Technology]
  • ISSN
    1229-604X
  • EISSN
    2508-3805
  • 간기
    격월간
  • 수록기간
    1999~2018
  • 등재여부
    KCI 등재
  • 주제분류
    공학 > 기계공학
  • 십진분류
    KDC 550 DDC 621
제16권 제4호 (26건)
No

학술연구

1

해양플랜트용 H-120급 방화 댐퍼의 열-구조 연성해석을 통한 시제품 제작 및 성능시험 입력

이치우

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1603-1609

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As a result of an analysis of a damper system, a solution to a fire damper is developed using thecontinuity equation of damper control and orthogonal array. The fire damping device is made with aCAE software. Additionally, new H-120 grade fire damper is designed for the optimal offshore structure. This device will soon be tested on an actual offshore structure. An optimized fire temper is finallyachieved using an orthogonal array. Using the result of present study will provide an environmentfriendly fire damper for offshore plants by choosing the optimum fire damper conditions.

4,000원

2

알루미늄 폼으로 구성된 TDCB 모델 접착부에서의 피로 특성에 관한 해석 연구

손홍붕, 조재웅

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1611-1615

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In this study, the specimen of tapered double cantilever beam(TDCB) with aluminum foam is designed and shearing fatigue strength is based on the investigation of static behaviour analysis under the condition of mode Ⅱ. These specimen models have length and width of 200 mm and 25 mm. The inclined angles of adhesive face at the specimens are 6°, 8 °and 10°. As the inclined angle becomes higher, the time for which the model can not be broken during fatigue load becomes longer. The shearing strength of TDCB bonded structure with aluminum foam applied by shearing fatigue load can be evaluated through finite element method.

4,000원

3

초대형 자동화 수동 변속 차량의 변속 시점 분석

김남웅, 박성천, 임원식

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1617-1623

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The conventional shifting map is developed to enhance the driving performance and fuel economy. According to the driver’s pedaling of accelerator, TCU controls gear ratio in view point of economy or driving performance. In this paper, various reverse engineering is applied to the driving test results of heavy duty AMT vehicle. With the test results, the performance of propulsion source is estimated and basic performance of vehicle is analized. Also the method to derive the shifting schedule according to power or fuel efficient, is developed and compared with the actual shifting map, and various shifting states is estimated. The developed numerical analysis model will be a stepping stone for the shift pattern development and various shift control research.

4,000원

4

저속 후면 추돌시 목 상해 방지에 대한 시트 안전도 평가

조휘창, 박인송

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1625-1630

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IIWPG protocol for the dynamic testing of motor vehicle seats is a test procedure for ratings of seats and head restraints for neck injury prevention in low speed rear impacts. In this study, we evaluates the performance of the car seat in the dynamic test was enacted by IIWPG and initial geometry test that has been enacted by RCAR to vehicle being sold in the market today. 6 models became the A and G in the final rating that reflects the results of the dynamic test and Initial geometry test. Electronic active head restraint was found to be allowed to operate quickly headrest, it is very effective in the prevention of neck injury in support of the head of the passenger. we suspects that this is contributed lower the value injuries reduce the relative acceleration between the chest and head. It is determined that the expanded application is required up to the small car because rating appears high in the vehicle equipped with the electric active head restraint. In addition to the evaluation of the impact velocity and collision direction, neck injury continued research to present proposals for improvement is required future.

4,000원

5

열충격 및 진동가진에 의한 터빈하우징의 파손현상 예측

이인범, 김구성, 최복록

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1631-1636

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This paper presents a method for the assesment of thermal and vibration fatigues in integral exhaust manifold/turbine housing system. Most of failures on turbine housing are observed by thermal cyclic loads. In order to predict thermal failures by finite element analysis, we considered the temperature-dependent inelastic materials and transient temperature histories based on the thermal shock test. The results showed that the plastic strains of localized critical regions such as valve seat coincided well with crack locations from an endurance test. But, some failures around neck areas of turbine housing could not predict from thermal stress analysis. These cracks were originated due to the vibration excitations near resonance frequencies within engine operating ranges. The stress results of neck areas, which divided by temperature dependent yield stresses, from harmonic analysis showd a good agreement with experimental results.

4,000원

6

2차원 밀폐공간 내 복사열전달 BEM 해석을 위한 음영효과 처리 알고리즘의 실행

최창용

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1637-1646

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Computational algorithms and their implementations are studied for the treatments of kernel function’s shadow effects, which occurs in the application of the BEM (boundary element method) for radiation heat transfer analysis. In this problem, surfaces are assumed to be diffuse and gray placed in two-dimensional enclosures with transparent medium. Self-blocking or third party blocking is possible when the radiosity from the BEM nodes cannot reach the destination points. Also the third party blocking can be the partial or total blocking case. Algorithms, which can accurately recognize the each blocking cases and reflect the shadow effects to the BEM kernel function, are studied in this paper. Effective implementation methods are presented, and their results are verified by the test problem.

4,000원

7

각주를 이용한 광각디퓨저의 유동제어에 관한 연구

심의보, 조대환

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1647-1652

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In this study, we have modeled a wide angle diffuser with rectangular prism and tried to investigate the influence of a turbulent wake flow by PIV and a numerical simulation using computational fluid dynamics based on steady-state Navier-Stokes equation and standard k-ε model. A commercial CFD program, FLUENT, is used on the analysis. The turbulent wake is generated by a rectangular prism, which is installed at the diffuser. The results show that it is possible to flow control by installing a rectangular prism within the diffuser and velocity recovery is the highest in aspect ratio 1:1.

4,000원

8

흑연 / 에폭시 복합재의 동적 특성

김봉환, 안국찬, 이치우

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1653-1658

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In this paper, the response of graphite/epoxy laminated composite beams subjected to impact loads without damage, is studied by the use of the developed finite element program. The modified Hertzian contact law considered elasto-plastic process is used to calculate the dynamic responses between the impactor and laminated target. Numerical results are presented to demonstrate the effects on the histories of contact force, deflection, damage energy, strain and stress through the thickness due to stacking sequence. In view of the kinetic energy response, [0/30/0/-30]2S laminate is faster than that of other two laminates due to its flexural stiffness. In special, the distribution of stress through the thickness shows nearly linear despite its discontinuity of stacking sequences for dynamic analysis unlike static analysis in a laminated composites.

4,000원

9

파이버 레이저를 이용한 알루미늄 합금과 고강도강판의 이종용접에 관한 연구

김지선, 김인주

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1659-1664

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Nowadays, the automotive industry has target to improve the fuel consumption due to restricted exhaust gas regulation. For this reason, the applicability of lightweight material, Al alloys, Mg alloys are also being expanded. In this concept, high strength steel, DP780 and light alloy, AL5052 are joined in the right place of the car body. However, it is difficult to join to steel and aluminum by conventional fusion welding. Generally, in respect to dissimilar metal joining by fusion welding, intermetallic compound layer formed at joint interface; hot cracking in generated. To evaluate the welding quality, tensile test and metallographic examination was carried. Especially, correlation between Heat per unit length and formation of intermetallic compound layer was minutely analyzed. Finally, optimal welding condition was selected for improvement of strength at weldment and practical use.

4,000원

10

대공간 건축물의 천정 취출구 각도변화에 따른 온도분포에 관한 연구

문기주, 정종안, 문훈영

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1665-1671

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Large enclosure means a space of high ceiling and large floor. Designing the heating system, many thermal conditions exist, such as thermal comfort, IAQ, heating load and energy efficiency etc. The prediction of the temperature distribution is carried out according to some of the diffuser angle. The simulation conditions are 7 m high diffuser, 4/2 inlet/outlet diffusers, 39 °C discharge air temperature, and 6 m/s exit velocity. The results show that 45° diffuser provides an optimal thermal environment, and the reason is that the temperature is closed to the designed temperature 22 °C at 1.18m elevation plane. As the diffuser angle is decreased, the temperature of the upper region is increased for the thermal buoyancy effect. And the asymmetry of the temperature distribution is increased.

4,000원

11

PIV를 이용한 다열 수직벽의 유동제어에 관한 연구

이철희, 조대환

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1673-1678

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There are vertical wall to prevent of circulation or pollution during building of ocean structures like a dam and bridge in the harbors area and the sea. Inflow fluid and base of structure are important thing as one of the structural design factors for this interception wall like a vertical wall and watertight wall. In this study, it is revealed that at least 2,000 instantaneous velocity field data are required for ensemble average to get reliable turbulence statistics. The flow behind of vertical wall was investigated using the PIV system from this study. From the results, the large vortex flow developed in recirculation zone for one row wall and two vortex flows developed over two rows. Scale of the vortices in recirculation zone was decreased to 45% over three rows.

4,000원

12

흡기 온도의 변화가 SI 엔진의 출력 성능 및 배기 특성에 미치는 영향

서현규

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1679-1684

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This experimental work was performed to reveal the effect of intake air temperature on the improvement of performance and exhaust emissions in a SI engine. To achieve this, fuel consumption rate, combustion pressure, rate of heat release, and reduction of exhaust emissions were measured and compared in 4-cylinder spark ignition engine. It was founded that lower intake air temperature can lead higher combustion pressure and heat release rate due to the higher intake air flow rate, volumetric efficiency, and fuel consumption rate. At the same time, higher intake air temperature leads to the longer ignition delay time, therefore, retarded ignition of engine was observed. Lower CO and HC values were also observed as the intake air temperature increases.

4,000원

13

정면 밀링 공정에서 절삭력 신호 형상 변화를 이용한 공구마모 검출에 관한 연구

박영복, 최덕기

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1685-1692

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On-line detection system of the abnormal states in a machining process needs to be developed to implement the IMS(Intelligent Manufacturing System). High productivity and efficient quality control can be achieved through the on-condition maintenance for normal tool condition. Generally it is difficult to determine the exact point of time for a tool change because a tool wear grows gradually on the contrary to other abnormal states such as tool fracture, chattering etc. In this article, the shape variation of cutting force signal generated by a insert during face milling was investigated along with a tool wear. The variance, skewness and kurtosis were used as the shape parameters to describe the shape variation and, consequently, utilized as the features to monitor a tool wear. Experimental results showed that the shape parameters could discriminate the tool condition reliably between a fresh tool and a worn tool. As a result, we proposed the method to diagnose a tool wear by combining these parameters with a neural network algorithm.

4,000원

14

구상흑연주철 펌프바디 주조방안에 따른 응고해석 평가

박창선, 성백섭

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1693-1699

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This research developed ultra-pressure pump main body by using ductile cast iron FCD500, conducted quantitative analysis on following phenomenon of flow or solidification processing in cast processing for improvement of cast device, after extracting model from cast concluded as follows by brinel hardness test. after selecting the ideal condition of cast and it applied to cast of real product shape, discovered the ideal filling processing under the condition that temperature of molten metal was between 1300℃ and 1280℃. and after finishing filling, solidification was commenced rapidly when percentage of solidification completion was between 40%~50%, at that moment, the termperature was measured 1100℃. moreover under the condition of temperature below 900℃, keeping temperature on the center of parts for a certain period of time brings stability of stabilization of heat in parts and organizational stabilization of ductile cast iron. As the results of the casting method design, it was that the ductile cast parts of pump main body was obtained as the maximum HB of 220 was recorded and good test results were achieved

4,000원

생산기술

15

초박막 전자파 차폐시트 자동 제조장치 개발

김봉석

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1707-1711

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Ultra thin sheet for electromagnetic interference(EMI) shielding purpose has been designed using base metal, PET & DST sheet stacking technology. Also, an automatic manufacturing system is developed. This ultra thin EMI shielding sheet is an effective shield against low frequency(~300kHz) EMI that can not shield completely by the existing EMI shielding sheet. And the developed automatic manufacturing system can stack ultra thin shielding sheet without any wrinkles.

4,000원

학술연구

16

고점도 도료 분사 시스템용 유량계의 유동해석

안국찬, 김봉환, 이치우

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1709-1714

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The purpose of this study is to develop the flowmeter of high viscosity paint spraying system. In this study, the numerical flow analysis of the flowmeter was performed. The velocity and the pressure distributions were obtained using the turbulent SST(Shear Stress Transport) model. The ICEM-CFD13 and CFXMesher, reliable grid generation software was also adapted to secure high quality grid necessary for the reliable analysis. According to the simulation results, the flow rate of flowmeter is 6.49l/min in case of Δp=45bar. This result was in good agreement with design result and could be applied to the actual design of the high viscosity paint spraying system.

4,000원

생산기술

17

지속적인 하중이 작용되는 인공무릎관절의 구조상의 응력분포에 관한 연구

황규완, 조재웅

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1713-1718

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This study investigates area and size of stress part appeared when the continuous loads are applied at artificial joint. Upper and lower parts composed with polyethylene shock absorber and titanium alloy are applied with the loads. The configurations of stress distribution near the hole of support to fix the frame are investigated and secured as through this study. As the result of this study, the stress is concentrated from the edge end of upper artificial joint. The crack is initiated at this point. This analysis result is similar with the instance of tissue corruption due to the damage of artificial joint.

4,000원

18

파이버 레이저 용접 공정을 이용한 Stainless와 Zircaloy-4의 용접특성 비교

김가혜, 홍진태, 정창용, 허성호

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1719-1724

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Fiber laser welding has been developed for precise welding of small and complicate components assembled on the nuclear fuel irradiation test rig. In this research, laser welding characteristics of STS316L, the main material of nuclear fuel test rig, have been studied. Several welding experiments were carried out in lap welding of the tube and the end cap made of STS316L. Process variables such as non-focal length, shield gas, laser frequency and power are optimized and compared with the results of Zircaloy-4.

4,000원

19

연통내 배기가스 중 이산화탄소 저감장치 개발

신준

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1725-1730

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The mitigation of carbon dioxide emissions from thermal power plants and industry sections becomes more and more important. Especially, it is much more effective to reduce the nation’s total greenhouse gases than any other fields. In this study, therefore, carbon dioxide capture system was developed to reduce dust and carbon dioxide from combustion of fossil fuel which is the main cause of global warming. Instead of amine as absorbent, pure water was applied to make up for weakness of previous chemical absorption technology. Captured carbon dioxide was collected as a tar and water was purified to reuse by using charcoal. And the prototype system was tested to verify the performance of reducing carbon dioxide.

4,000원

20

다공성물질이 충전된 용기 내에서 순수의 동결거동에 관한 연구

최주열, 조대환

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1731-1736

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Freezing of the pure water saturating a packed bed of spheres in a rectangular cavity is performed experimentally to investigate the effect of bead diameter on the heat transfer rate and temperature vs. time history for the pure water freezing experiments were compared with the freezing of the binary solution(HO-NaCl). Spherical soda-lime glass beads of 2.85mm and 6mm in average diameter constitute the porous medium. The system is cooled through its bottom surface, and the top is maintained at a temperature above the liquids. There was small effect on the temperature distribution in the system of the porosity difference.

4,000원

21

전동식 액추에이터를 적용한 무논정지기 개발 및 위치제어

이학성

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1737-1742

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Paddy harrow machine used hydraulic actuator system has been changed to the electric actuator system method. Because driving system of the agricultural equipments has been changed to electric power system. Besides, the effort to reduce the tractor machine's horse power is proceeding rapidly. In this paper, pressure, load scale factor and loading force(dynamic, static force) are considered to determine the cylinder diameter of the electric actuator. The algorithms of paddy harrow machine was studied to control and test the components of link by using the PLC diagram. Also, the electric actuator mechanism system was evaluated through the PLC algorithm. These test results can be attributed to select the actuator capacity and to determine the reliability of the electric actuator system.

4,000원

22

파라메트릭 기법을 활용한 유압장비의 메인컨트롤밸브의 모델링

이태근, 김태규, 김병삼

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1743-1749

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The hydraulic equipments has a high utilization in the many works such as the excavation, planation and crane works in the construction sites. They are an essential equipments in the construction site and the loading & unloading works of the large size objects. In the many parts which are composed of the hydraulic equipments, the main control valve(MCV) is the core of the equipments. The hydraulic energy from the pump controls the direction and the rate of flow and supply the pressure energy to the some actuators by MCV. In spite of the domestically producing of the common control valves, the MCV which used to the domestic equipments is imported the whole quantity. In this study, it is to reverse-engineer the MCV as the first step in the development of the MCV. To analyze the notch of the spool and the flow path and to apply the formula technique, we try to realize the optimal modeling of the MCV.

4,000원

23

중세선 연속 스트레이트 와이어 자동 제조장치 개발

김봉석, 오익수

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1751-1757

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Wire manufacturing system is consist of several parts performing such as feeding, drawing, straightening, heat treatment, surface finish and winding. Drawing and straightening processes are repetitive tasks and the most of the them are performed discretely. In this study, automatic manufacturing system for medium fine straight wire has been developed. The developed system is operated with continuous processes, so decrease the time cost and increase product quality.

4,000원

24

대응출력에 따른 선박용 과급기에 의한 디젤기관의 배출특성 비교 연구

김봉환, 이치우, 안국찬

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1759-1765

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This is a thesis about the experiment of comparison characteristic of exhaust gas in the same condition between diesel engine that is equipped turbocharger to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment turbocharger diesel engine according to response power, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is almost the same in four turbocharger. In other hand, in exhaust gas experiment, high response power turbocharger model exhausts less NOX, but it doesn’t significantly affect the result when it comes with decreasing of CO2 and effectiveness of similar power characteristic. As a result, the high response power turbocharger diesel engine is economically effective comparing with the low response power turbocharger diesel engine.

4,000원

25

차량 휠 커버용 회전 도장시스템의 도료 분사조건 연구

박경민, 정석훈

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1767-1772

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Within aging rotary painting system for plastic wheel cover, sprayed paint particles caused the quality problem as attached to back surface of the wheel cover by the cyclone vortex in the booth. The purpose of this study is to select the spray conditions to ensure a stable quality of the rotary painting system. For this, simulation for flow characteristics of each spray nozzle have been carried out using ANSYS program, and tested to find the optimum spray condition, such as spray distance, spray pressure and rotation speed by manufactured test apparatus of paint spray. Finally, satisfactory results were obtained by testing with a actual painting system in developed spray conditions.

4,000원

26

이중축 플라스틱 성형장치의 강성 및 유동특성에 대한 연구

백일현

한국기계기술학회 한국기계기술학회지 제16권 제4호 2014.08 pp.1773-1778

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Carousel type rotating molding machine is a plastics molding method that is adapted to producing relatively large and seamless parts which are partially or totally enclosed. So it is used to produce the big septic tank, storage tray, icebox, central reservation and so on. Rotating molding method are Rock and Roll, Shuttle, Carousel type, etc. In this study, to develop Carousel type rotating molding machine, its 3D model has designed. Also, to confirm the performance of this model, the theoretical and experimental analysis were carried out under condition of shape and structure of rotating unit and heating unit in molding machine

4,000원

 
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