• Structural Engineering and Mechanics
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• 제23권4호
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• pp.431-447
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• 2006

A new incremental finite element model is developed to simulate the frictional contact of elastic bodies. The incremental convex programming method is exploited, in the framework of finite element approach, to recast the variational inequality principle of contact problem in a discretized form. The non-classical friction model of Oden and Pires is adopted, however, the friction effect is represented by an equivalent non-linear stiffness rather than additional constraints. Different parametric studies are worked out to address the versatility of the proposed model.

• Structural Engineering and Mechanics
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• 제85권4호
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• pp.545-562
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• 2023

In this work, superharmonic and subharmonic resonance of rotating stiffened FGM truncated conical shells exposed to harmonic excitation in a thermal environment is investigated. Utilizing classical shell theory considering Coriolis acceleration and the centrifugal force, the governing equations are extracted. Non-linear model is formulated employing the von Kármán non-linear relations. In this study, to model the stiffener effects the smeared stiffened technique is utilized. The non-linear partial differential equations are discretized into non-linear ordinary differential equations by applying Galerkin's method. The method of multiple scales is utilized to examine the non-linear superharmonic and subharmonic resonances behavior of the conical shells. In this regard, the effects of the rotating speed of the shell on the frequency response plot are investigated. Also, the effects of different semi-vertex angles, force amplitude, volume-fraction index, and temperature variations on the frequency-response graph are examined for different rotating speeds of the stiffened FGM truncated conical shells.

• 대한수학회지
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• 제32권3호
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• pp.625-633
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• 1995

Classical Fatous' theorem asserts that the non-tangential limit of the Poisson integral of an integrals function on $[\pi, \pi]$ exists a.e.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2004년도 제27회 학술발표회 초록집
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• pp.66-67
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• 2004

• 복식문화연구
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• 제9권1호
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• pp.19-32
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• 2001

The purpose of this study is to determine aesthetical characteristics of the Korean traditional wedding dress for women by analyzing such dresses'aesthetical senses. For the purpose, the study showed four types of the dress, jukyee, whalot, weonsam and private weonsam and their photographed stimuli to subjects and then obtained data using the seven scale measures of meaning differentiation consisting of 25 pairs of adjective words. Results of the study are described as follows; Aesthetical senses shown in the Korean traditional dressing dress for women included six factors in total, among which attractiveness was found as the main factor, followed by chastity. For the four types of the dress, whalot adpated revelation as its main factor while the remaining three types, or jukyee, weonsam and private weonsam were found having dignity as their main factors. Adjective words which largely accounted for aesthetical senses included uncomfortable, warn, chaste, intellectual, bright, unique, regular, luxurious, classical, ornamental and beautiful suggesting that the Korean traditional wedding dress for women is somewhat unfunctional, but high in attractiveness and aesthetic beauty and has a better classical harmonization of dignity and revelation. Aesthetical senses were most different according to nationality(Korean and Japan) when they were analyzed in terms of nationality, gender and whether of specialization or non-specialization. Japanese people had unique and interesting senses while Korean people, chaste, calm and delicate aesthetical senses. According to gender, men revealed free senses and women, classical ones. According whether of specialization or non-specialization those who specialized in a related field had more unique, straight, regular, luxurious and interesting aesthetical senses that those who did not specialize.

• Smart Structures and Systems
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• 제18권6호
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• pp.1125-1143
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• 2016

Forced vibration analysis of a simple supported viscoelastic nanobeam is studied based on modified couple stress theory (MCST). The nanobeam is excited by a transverse triangular force impulse modulated by a harmonic motion. The elastic medium is considered as Winkler-Pasternak elastic foundation.The damping effect is considered by using the Kelvin-Voigt viscoelastic model. The inclusion of an additional material parameter enables the new beam model to capture the size effect. The new non-classical beam model reduces to the classical beam model when the length scale parameter is set to zero. The considered problem is investigated within the Timoshenko beam theory by using finite element method. The effects of the transverse shear deformation and rotary inertia are included according to the Timoshenko beam theory. The obtained system of differential equations is reduced to a linear algebraic equation system and solved in the time domain by using Newmark average acceleration method. Numerical results are presented to investigate the influences the material length scale parameter, the parameter of the elastic medium and aspect ratio on the dynamic response of the nanobeam. Also, the difference between the classical beam theory (CBT) and modified couple stress theory is investigated for forced vibration responses of nanobeams.

• 대한한의학원전학회지
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• 제26권3호
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• pp.99-109
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• 2013

Objective : The purpose of this study is to extend indications of Four-Constitution Medicinal formulas by comparing with formulas on Dongeuibogam(東醫寶鑑), focusing on their composition. Method : 1. We analyzed the composition of Sanghan formulas(傷寒方) and non-classical formulas(後世方) which are mentioned on Donguisusebowon(東醫壽世保元), focusing on their composition. 2. We analyzed the composition of formulas on Dongeuibogam(東醫寶鑑) comparing with Bojungyikgi-tang for So-Eum type. Result & Conclusion: 1. Je-Ma Lee didn't say the Sanghan formulas(傷寒方) and non-classical formulas(後世方) with criterion of composition on his book. 2. We finally selected one formulas(Insamhwanggi-tang) and its effect as similar formulas with Bojungyikgi-tang for So-Eum type.

• Journal of Astronomy and Space Sciences
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• 제28권1호
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• pp.37-54
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• 2011

Two semi-analytic solutions for a perturbed two-body problem known as Lagrange planetary equations (LPE) were compared to a numerical integration of the equation of motion with same perturbation force. To avoid the critical conditions inherited from the configuration of LPE, non-singular orbital elements (EOE) had been introduced. In this study, two types of orbital elements, classical Keplerian orbital elements (COE) and EOE were used for the solution of the LPE. The effectiveness of EOE and the discrepancy between EOE and COE were investigated by using several near critical conditions. The near one revolution, one day, and seven days evolutions of each orbital element described in LPE with COE and EOE were analyzed by comparing it with the directly converted orbital elements from the numerically integrated state vector in Cartesian coordinate. As a result, LPE with EOE has an advantage in long term calculation over LPE with COE in case of relatively small eccentricity.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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• pp.37-38
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• 2005

Although the law of classical fourier heat conduction predicts the heat conduction phenomena occurred in most engineering fields with a good accuracy, it is also well-known that the conventional fourier law of a heat conduction has an application limit when the heating and cooling are periodic for a short duration or when the heat conduction is analyzed in the extremely low temperature region. This application limit of classical fourier law results from the fact that it assumed the infinite speed of a heat wave. In this study, we investigated the feasibility of whether the molecular dynamics could be used to calculate the speed of a heat wave through a solid. The calculated sound velocity showed a good agrement with the theoretical prediction qualitatively. From the calculated results, we confirmed that the same methodology can be applied the evaluation of the speed of a heat wave.

• 대한한의학원전학회지
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• 제25권1호
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• pp.17-29
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• 2012

Indications of Hyeongbangpaedok-san for Soyang-type on "Donguisusebowon" are small. Therefore, indications of Hyeongbangpaedok-san for Soyang-type need to be extended for broader clinical use. There would be some methods to do that, and we could review "Dongeuibogam" that Four-Constitution Medicine formulas are based on. We reviewed Hyeongbangpaedok-san, Insampaedok-san which is the origin of Hyeongbangpaedok-san, and their modified formula(加減方) on "Dongeuibogam". As a result, we supposed 12 indications of non-classical formula(後世方) Hyeongbangpaedok-san, 2 indications of modified formula of non-classical formula Hyeongbangpaedok-san, and 12 indications of Insampaedok-san and its modified formula as possible indications of Hyeongbangpaedok for Soyang-type.