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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Transactions of the KSME C: Industrial Technology and Innovation
Journal Basic Information
Journal DOI :
The Korean Society of Mechanical Engineers
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Volume & Issues
Volume 3, Issue 4 - Dec 2015
Volume 3, Issue 3 - Sep 2015
Volume 3, Issue 2 - Jun 2015
Volume 3, Issue 1 - Mar 2015
Selecting the target year
Structural Strength Evaluation for Development of a Vertical Transfer Device for a Personal Rapid Transit (PRT) Vehicle
Kang, Seok-Won ; Um, Ju-Hwan ; Jeong, Rag-Gyo ; Song, Joon-Hyun ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 165~173
DOI : 10.3795/KSME-C.2015.3.3.165
This paper presents numerical results of static structural stability analysis in development of a vertical transfer device of a PRT(Personal Rapid Transit) vehicle. The vertical transfer of a fully occupied vehicle operating on a road network is the first attempt, which is expected to contribute to overcome the limitations of conventional 2-dimensional operation mode. In particular, the vertical transfer apparatus designed based on vertical circulating conveyors is capable of continuous transfer without time delay so that it enables to accommodate a high traffic density. This system has been frequently used in a logistics field; however, it is essential to assess a structural integrity because an external force by a vehicle weight is exerted on the conveyors in the form of a concentrated load unlike a conventional logistic transport. In this study, prior to the production process, the structural performance of the pilot design in an early stage is numerically evaluated using the commercial finite element method (FEM) solver (i.e.,
A Study On Cause Analysis and Improvement About Malfunction of Proximity Sensor Exposed High Temperature
Park, Jin-Saeng ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 175~181
DOI : 10.3795/KSME-C.2015.3.3.175
Because internal space of combat vehicle reachs about
at high temperature period, Proximity Sensor exposed high temperature and humidity, which has function to sense the distance and transfer signal for control unit, have enlarged sensing distance and finally locked on. Malfunction of sensing itself occur frequently, therefore we carried out cause analysis and improvement. We accomplish improvement activity secondly. Through-out many trial and error, we find out that malfunction of sensor occur at high temperature circumstance. To improve, the another Emitter Coil is added to increase voltage difference and improve sensing accuracy about 5~10 times. And we accomplish design improvement to dull temperature and humity change after increasing molding surface to add vibration and shock resistance. We prove that the improved product do not fail after enduring 136hr at
temperature and 85% relative humidity circumstance chamber.
Dynamic Characteristic Analysis of Active Gurney Flap Considering Rotational Effect
Kee, YoungJung ; Kim, TaeJoo ; Kim, DeogKwan ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 183~191
DOI : 10.3795/KSME-C.2015.3.3.183
In this study, the finite element analysis was carried out to investigate dynamic characteristics of the AGF(Active Gurney Flap) which is under development for reducing vibration and noise of the helicopter rotor system. The Gurney flap is a kind of small flat plate, mounted normal to the lower surface of the airfoil near to the trailing edge. An electric motor, L-shaped linkages and flap parts were integrated into a rotor bade, and 3~5/rev control was given to the AGF to reduce the vibration in the fixed frame. Thus, an explicit time integration method was adopted to investigate the dynamic response of the AGF with considering both centrifugal force due to the rotor rotation and active control input, and it can be seen that the vertical displacement of the AGF was satisfied to meet the design requirement.
An Effect of Surface Dashpot for KC-1 Basic Insulation System Under Sloshing Loads
Jin, Kyo Kook ; Yoon, Ihn Soo ; Yang, Young Chul ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 193~199
DOI : 10.3795/KSME-C.2015.3.3.193
Sloshing of LNG cargo can cause high impact loads on the supporting and containing structures. This is particularly critical for membrane-type tanks since these will have flat surfaces and corner regions which can lead to increased peak pressures for sloshing impacts. The membrane-type containment system is much more flexible compared to the steel hull structure. As a result, fluid-structure interaction plays an important role in the structural analysis of the containment system under sloshing load. This study is based on the direct calculation method of applying sloshing loads to the KC-1 basic insulation system using finite element analysis. The structural analysis of KC-1 basic insulation system considers the dashpot as fluid-structure interaction between liquid cargo and the LNG containment system. The maximum stress of the polyurethane form for KC-1 insulation system is 1.5 times lower than one without dashpot.
Study on Performance Improvement Air Cooled Condenser Considering Ambient Condition
Cha, Hun ; Ryu, Gwang-Nyeon ; Kim, Jung-Rae ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 201~207
DOI : 10.3795/KSME-C.2015.3.3.201
Air cooled condenser for power plant is used at inland area of desert or mountainous area because condenser coolant like sea water is not necessary. However, the performance of air cooled condenser is influenced by ambient condition such as wind speed and air temperature. Therefore, various devices have been designed to improve the performance of air cooled condenser. In this study, the CFD analysis for air cooled condenser was carried out according to wind speed and wind screen configuration. As wind speed increased from 3m/s to 7m/s, the fan flow rate was reduced about 15.76% and the rise of inlet air temperature was 5.55 degree of Celsius. When the suitable wind screen is equipped, the fan flow rate went up about 5.18% and inlet air temperature dropped by 2.08 degree of Celsius in comparison with original case without wind screen at 7m/s wind speed.
Effect of Top-Mounted ICI on Severe-Accident Mitigation
Suh, Jungsoo ; Kim, Han Gon ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 209~215
DOI : 10.3795/KSME-C.2015.3.3.209
The effects of the mounting location of ICI cables on severe accident mitigation systems, specially IVR-ERVC (In-Vessel Retention by External Reactor Vessel Cooling) and core catcher (Ex-vessel corium retention and cooling system), are investigated. The effects of bottom-mounted ICI strategy on severe accident mitigation are summarized and advantages of top-mounted ICI to improve severe accident mitigation are also highlighted.
In-situ Patterning of Magnetic Particles in Microfluidic Channels by Forward/Reverse Local Magnet Arrangement
Park, Hyoun-Hyang ; Lee, Ji Hae ; Yoo, Yeong Eun ; Kim, Jung-Yup ; Chang, Sunghwan ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 217~223
DOI : 10.3795/KSME-C.2015.3.3.217
The patterning of microbead in microfluidics channel is a practical technique for application in bio and medical areas. An approach is described for a direct patterning of magnetically active microbeads in microfluidic devices without inner structure. Local magnet arrangements - flat arrangement and stack arrangement - contacting same poles or opposite poles of magnet were utilized for generating trapping magnetic fields. The arrangement of magnets contacting same poles generated isolated patterns by repelling of magnetic field. The flat arrangement of vertically reverse magnet arrays shaped trapping patterns repelling magnetic field line between same poles. Spatially, the stack compositions of magnet arrangements allow diverse isolated trapped patterns of magnetic particles. Trapped magnetic particles in fluidic channels were stable on the
flow conditions and magnetic force of 1.08 mT in the all experiments. This experimental study suggests the simple and versatile methods to pattern magnetic particles, and has potential of wide application to bio and medical area.
Conceptual Design of a Magnetic Jack Type In-Vessel Control Element Drive Mechanism
Park, Jinseok ; Lee, Myounggoo ; Chang, Sanggyoon ; Lee, Daehee ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 225~232
DOI : 10.3795/KSME-C.2015.3.3.225
The control element drive mechanism (CEDM) is an electro-mechanical device to control reactivity of the nuclear reactor. The conventional CEDM was installed on a nozzle of the reactor vessel closure head as an ex-vessel type. However, there have been demands for an in-vessel CEDM to fundamentally eliminate the rod ejection accident. Conceptual design of the in-vessel CEDM, which was developed based on the existing technology of the ex-vessel CEDM, is introduced in this paper.
Effects of Geometric Parameters of a Bobsleigh on Aerodynamic Performance
Shim, Hyeon-Seok ; Jung, Hyo-Yeon ; Kim, Jun-Hee ; Kim, Kwang-Yong ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 3, issue 3, 2015, Pages 233~240
DOI : 10.3795/KSME-C.2015.3.3.233
Analysis of the aerodynamic performance of a bobsleigh has been performed for various types of bobsleigh body shape. To analyze the aerodynamic performance of the bobsleigh, three-dimensional Reynolds-averaged Navier-Stoke equations were used with the standard k-
model as a turbulence closure. Grid structure was composed of unstructured tetrahedral grids. The radii of curvature of cowling, and height and length of front bumper at the tip on the drag coefficient were selected as geometric parameters. And, the effects of these parameters on the aerodynamic performance, i.e., the drag coefficient, were evaluated. The results shows that the aerodynamic performance is significantly affected by the height of front bumper and radius of curvature.