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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Marine Engineering
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Journal DOI :
Korean Society of Marine Engineers
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Volume & Issues
Volume 14, Issue 4 - Aug 1990
Volume 14, Issue 3 - Jun 1990
Volume 14, Issue 2 - Apr 1990
Volume 14, Issue 1 - Feb 1990
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A Study on the Stress Analysis ofAxi-symetric Body with N on-symetric Load and N on-symetric Given Displacements
Journal of the Korean Society of Marine Engineering, volume 14, issue 4, 1990, Pages 46~56
Stress analysis of axi-symetric body with non-symetric loading and non-symetric given displacements is investigated in this paper using the finite element method. As the non-symetric load and non-symetric given displacements of axi-symetric body are generally periodic functions of angle .theta., the nodal forces and nodal displacements can be expanded in cosine and sine series, that is, Fourier series. Furthermore, using Euler's formula, the cosine and sine series can be converted into exponential series and it is prooved that the related calculus become more clear. Substituting the nodal displacements expanded in Fourier series into the strain components of cylindrical coordinates system, the element strains are expressed in series form and by the principal of virtual work, the element stiffness martix and element load vector are obtained for each order. It is also showed that if the non-symetric loads are even or odd functions of angle
the stiffness matrix and load vector of the system are composed with only real numbers and relatively small capacity fo computer memory is enough for calculation.
A Study on the Convective Heat Transfer in a Regenerative Ice Energy System by a Bundle of the Heat-pipes.
Journal of the Korean Society of Marine Engineering, volume 14, issue 4, 1990, Pages 57~66
In the design of an electric power plant, the capacity to meet the peak load demand is one of the important factors to be considered. This peak load usually occurs when the most of the cooling air conditioning systems are being operated during daytime in summer season, which inevitably entails the construction of an additional electric power plant. This study is aimed to carry out a basic experiment for the development of a cooling air conditioning system using the ice energy by the surplus electric power during the night-time. The experimental apparatus consists of four major parts; (1) the heating section consisting of the air duct and I.D. fan, (2) the cold section with the ice chamber, (3) the bundle of heat pipes made in a form of the staggered arrangement with
=1.73, (4) the refrigerator system to cool down the ice chamber. This study involves an intensive experiment concerning the convective heat transfer of the air flow surrounding the bundle of heat pipes. This major experimental parameters are the amount of working fluid, the velocity of air and the working temperature. The major findings of the present study are as follows; (1) The optimum amount of the working fluid necessary for the horizontal heat pipes is much more than that for the vertical type. (2) The convective heat transfer coefficients of the air are coincided with the empirical equations of Grimson and
. (3) The equation of the mean heat transfer coefficient obtained in the present study is
On a Finite Dynamic Element Method for Free Torsional Vibration of the Beam
Journal of the Korean Society of Marine Engineering, volume 14, issue 4, 1990, Pages 67~71
The traditional finite element method applied to dynamic problems employs shape functions which are based on a static displacement assumption. The more exact approach uses frequency-dependent shape functions and frequency-dependent mass and stiffness matrices. Such matrices are developed for a torsional vibration of shaft element. Numerical examples are presented for a cantilever beam.
A Study on the Optimum Design of the Intake Manifold for Diesel Engine
Journal of the Korean Society of Marine Engineering, volume 14, issue 4, 1990, Pages 72~80
In this paper, the gas dynamic effects of the suction pipe systems which have resinators are investigated on the volumetric efficiency are theoretically investigated by the engine performance simulation program which has been already developed. As the results, the optimum design method of the suction pipe system which has the overall high the flat characteristic curve of volumetric efficiency is developed in case of one cylinder engine.