スピンドルロータのポルト締結部における等価剛性 山本浩,鄭穎; 沼崎知宏
Volume：74,
Number：743,
First page：1702,
Last page：1709, 2008
DOI：https://doi.org/10.1299/kikaic.74.1702DOI ID：10.1299/kikaic.74.1702,
ISSN：0387-5024,
CiNii Articles ID：110006836826 スピンドルロータの振動特性にポルト締結部が及ぼす影響 山本浩,鄭穎; 沼崎知宏
Volume：74,
Number：742,
First page：1432,
Last page：1437, 2008
DOI：https://doi.org/10.1299/kikaic.74.1432DOI ID：10.1299/kikaic.74.1432,
ISSN：0387-5024,
CiNii Articles ID：110006793579 空気ばねで支持された2自由度系の最適設計 山本浩,鄭穎; 岡田淳一
Volume：74,
Number：741,
First page：1129,
Last page：1136, 2008
DOI：https://doi.org/10.1299/kikaic.74.1129DOI ID：10.1299/kikaic.74.1129,
ISSN：0387-5024,
CiNii Articles ID：110006685250 粘性絞りを有する空気ばねの最適設計 山本浩, 鄭穎
Volume：74,
Number：739,
First page：529,
Last page：535, 2008
DOI：https://doi.org/10.1299/kikaic.74.529DOI ID：10.1299/kikaic.74.529,
ISSN：0387-5024,
CiNii Articles ID：110006643664 Effects of Restriction Characteristics on Characteristics of Air Suspension
YAMAMOTO Hiroshi; ZHENG Ying; OKUMOTO Shingo
Transactions of the Japan Society of Mechanical Engineers C, Volume：74, Number：739, First page：521, Last page：528, 2008
In this study we make clear the characteristics of an air suspension with a flow channel connected from a cylinder to a reservoir tank. The flow resistance of channel is given by a viscous restriction or an orifice restriction. Differences between approximated analytical results, which are based on the 3-element model, of stiffness and damping coefficients of the air suspension with the viscous restriction and results of numerical analysis considering non-linear characteristics are very small. Moreover, the approximated analytical results of a transfer function of the air suspension and the experimental results of it are good well. Dependence of the oscillating amplitude on the maximum value of the transfer function of the air suspension system with the viscous restriction is very small since dependence of the oscillating amplitude on the stiffness and the damping is almost negligible. However, it depends on the oscillating amplitude of air suspension system with the orifice restriction because the damping coefficient of that decreases when the oscillating amplitude decreases. We can choose the optimal restriction coefficient of viscous restriction to minimize resonance amplitude easily. However, it is difficult to choose the optimal restriction coefficient of orifice restriction to minimize resonance amplitude because the oscillating amplitude often fluctuates generally. Thus, the air suspension with the viscous restriction is better for isolating the small vibration, in case of the high precision machinery.
The Japan Society of Mechanical Engineers, Japanese
DOI ID：10.1299/kikaic.74.521, ISSN：0387-5024, CiNii Articles ID：110006643663, CiNii Books ID：AN00187463
スピンドルロータのポルト締結部における等価剛性
山本浩,鄭穎; 沼崎知宏
日本機械学会論文集, Volume：74, Number：743, First page：1702, Last page：1709, 2008
This paper describes an investigation of equivalent stiffness of a joint layer of a spindle rotor. The test rotor is composed of a journal part and two thrust plates bound with bolts. The each thrust plate and the journal part are clamped with eight M 4 bolts which are arranged on the circle at 45 degrees intervals with a uniform clamping torque. The each surface of bolted joints is processed by two methods in order to change the roughness of surface. We propose the identify procedure of the equivalent stiffnesses of the joint layer in normal and tangential direction based on the modal analysis theory and we can identify the equivalent stiffness in two surface conditions of joint layer. By using the identified equivalent stiffnesses, we can calculate natural frequencies of higher order which are not used in the identified procedure and the calculated ones are fairly good well with the measured natural frequencies of higher order. In two surface conditions of the joint layer, the normal stiffness and the tangential stiffness increase as the clamping torque of each bolt increases. On the other hands, in all condition of clamping torque, the normal stiffness and the tangential stiffness increase as the roughness of surface decreases. Moreover, the ratio of the tangential stiffness to the normal stiffness decreases as the surface of ronghness decreases.
The Japan Society of Mechanical Engineers, Japanese
DOI ID：10.1299/kikaic.74.1702, ISSN：0387-5024, CiNii Articles ID：110006836826, CiNii Books ID：AN00187463
スピンドルロータの振動特性にポルト締結部が及ぼす影響
山本浩,鄭穎; 沼崎知宏
日本機械学会論文集, Volume：74, Number：742, First page：1432, Last page：1437, 2008
This paper describes an investigation of the effect of joint layer on the vibration characteristics of a spindle rotor. The test rotor is composed of a journal part and two thrust plates bound with bolts. Each thrust plate and a journal part are clamped with eight M4 bolts which are arranged on the circle at 45 degrees intervals with a uniform clamping torque. The each surface of bolted joints is processed by two methods in order to change the roughness or roundness of surface. In this paper, we consider the lower three bending vibration mode of the spindle. In all conditions of surface of joint layer, natural frequencies increase and damping ratios decrease as the clamping torque of each bolt increases. On the other hands, in all condition of clamping torque, natural frequencies increase and damping ratios decrease as the roughness and roundness of surface decreases. Moreover, we can decrease the resonance amplitude by increasing clamping torque, decreasing roughness and roundness of surface.
The Japan Society of Mechanical Engineers, Japanese
DOI ID：10.1299/kikaic.74.1432, ISSN：0387-5024, CiNii Articles ID：110006793579, CiNii Books ID：AN00187463
空気ばねで支持された2自由度系の最適設計
山本浩,鄭穎; 岡田淳一
日本機械学会論文集, Volume：74, Number：741, First page：1129, Last page：1136, 2008
In this study we propose a design procedure of two degree of freedom system supported with air suspensions with viscous restrictions and a reservoir tanks. We use two design concepts of minimizing resonance amplitude and minimizing standard deviation of amplitude against external disturbance random vibrations of foundation. To minimize resonance amplitude, the damping ratio, which corresponds to the restriction coefficient of viscous restriction, has to be chosen in order to equalize the resonance amplitude under the condition of parallel oscillating to that under the condition of rotating oscillating. To minimize standard deviation of amplitude of the system, the optimum damping ratio which minimize the standard deviation of amplitude of the system under the condition of rotating oscillating has to be chosen when the natural frequency of the parallel mode is lower than that of the rotating mode. The optimum damping ratio which minimize the standard deviation of amplitude of the system under the condition of parallel oscillating has to be chosen when the natural frequency of the rotating mode is lower than that of the parallel mode.c
The Japan Society of Mechanical Engineers, Japanese
DOI ID：10.1299/kikaic.74.1129, ISSN：0387-5024, CiNii Articles ID：110006685250, CiNii Books ID：AN00187463
粘性絞りを有する空気ばねの最適設計
山本浩, 鄭穎
日本機械学会論文集, Volume：74, Number：739, First page：529, Last page：535, 2008
In this study we propose a design procedure of an air suspension with a viscous damping restriction and a reservoir tank. We use two design concepts of minimizing resonance amplitude and minimizing standard deviation of amplitude against external disturbance random vibrations of foundation. In order to reducing resonance amplitude and standard deviation of amplitude, it is necessary to increase the volume ratio of the reservoir tank to the main cylinder. In these case, we can choose the optimum damping ratio which corresponds to the restriction coefficient of viscous restriction to minimize resonance amplitude or standard deviation of amplitude. As the volume ratio becomes larger, the difference between the optimum damping ratio which provides minimum resonance amplitude and what provides minimum standard deviation of amplitude becomes larger. However, we can realize the air suspension whose standard deviation of amplitude is relatively small although we choose the volume ratio and the damping ratio to minimize the resonance amplitude.
The Japan Society of Mechanical Engineers, Japanese
DOI ID：10.1299/kikaic.74.529, ISSN：0387-5024, CiNii Articles ID：110006643664, CiNii Books ID：AN00187463
空気ばねの特性に絞り特性が及ぼす影響
山本浩; 鄭穎; 奥本眞吾
日本機械学会論文集, Volume：74, Number：739, First page：521, Last page：528, 2008
In this study we make clear the characteristics of an air suspension with a flow channel connected from a cylinder to a reservoir tank. The flow resistance of channel is given by a viscous restriction or an orifice restriction. Differences between approximated analytical results, which are based on the 3-element model, of stiffness and damping coefficients of the air suspension with the viscous restriction and results of numerical analysis considering non-linear characteristics are very small. Moreover, the approximated analytical results of a transfer function of the air suspension and the experimental results of it are good well. Dependence of the oscillating amplitude on the maximum value of the transfer function of the air suspension system with the viscous restriction is very small since dependence of the oscillating amplitude on the stiffness and the damping is almost negligible. However, it depends on the oscillating amplitude of air suspension system with the orifice restriction because the damping coefficient of that decreases when the oscillating amplitude decreases. We can choose the optimal restriction coefficient of viscous restriction to minimize resonance amplitude easily. However, it is difficult to choose the optimal restriction coefficient of orifice restriction to minimize resonance amplitude because the oscillating amplitude often fluctuates generally. Thus, the air suspension with the viscous restriction is better for isolating the small vibration, in case of the high precision machinery.
The Japan Society of Mechanical Engineers, Japanese
DOI ID：10.1299/kikaic.74.521, ISSN：0387-5024, CiNii Articles ID：110006643663, CiNii Books ID：AN00187463
気体軸受の焼け付き現象に関する研究
鄭穎
Volume：第5号(18年度), First page：586, Last page：587, 2007
気体軸受の焼け付き現象に関する研究
鄭穎
総合研究機構研究プロジェクト研究成果報告書, Volume：第5号(18年度), First page：586, Last page：587, 2007
Influence of surface finishing upon seizure in gas bearing
P.Karpov; H.Yamamoto; K.Azizul; Y.Zheng; M.Harada
2005
Influence of rotating speed upon seizure in gas bearing
P.Karpov; H.Yamamoto; K.Azizul; Y.Zheng; M.Harada
2005
Influence of surface finishing upon seizure in gas bearing
P.Karpov; H.Yamamoto; K.Azizul; Y.Zheng; M.Harada
The 1st International Conference on Manufacturing,Machine Design and Tribology(June 23-24 2005,Seoul), 2005
Influence of rotating speed upon seizure in gas bearing
P.Karpov; H.Yamamoto; K.Azizul; Y.Zheng; M.Harada
The 1st International Conference on Manufacturing,Machine Design and Tribology(June 23-24 2005,Seoul), 2005
Thermal Stresses in a Thick Plate Containing an Oblate Spheroidal Inhomogeneity with the Circle Regions of both Plate Surfaces being Heated and Cooled ZHENG Ying; TSUCHIDA Eiichiro; ARAI Yoshio
Transactions of the Japan Society of Mechanical Engineers Series B,
Volume：70,
Number：693,
First page：740,
Last page：748, 2004
In this paper, we investigate the steady state thermal stresses in an elastic thick plate containing an oblate spheroidal inhomogeneity, when the circle regions of radius d of the upper surface is heated and the one of lower surface is cooled. The solution is deduced with using thermoelastic displacement potential and Papkovich-Neuber displacement potentials. Numerical results are presented for different heat areas, inclusion shapes and sizes, and the stress distributions in the vicinity of the inhomogeneity are illustrated graphically.
The Japan Society of Mechanical Engineers, Japanese
DOI：https://doi.org/10.1299/kikaia.70.740DOI ID：10.1299/kikaia.70.740,
ISSN：0387-5008,
CiNii Articles ID：110004998752,
CiNii Books ID：AN0018742X Stresses in a Thick Plate Containing an Oblate Spheroidal Inclusion Under Transverse Bending Ying Zheng; Eiichiro Tsuchida; Yoshio Arai
Volume：53,
First page：49,
Last page：62, 2004
DOI：https://doi.org/10.11345/nctam.53.49DOI ID：10.11345/nctam.53.49 上面加熱下面冷却される偏平回転だ円体状介在物を有する厚板の定常熱応力 鄭穎; 土田栄一郎; 荒居善雄
日本機械学會論文集. A編,
Volume：70,
Number：693,
First page：740,
Last page：748, 2004
In this paper, we investigate the steady state thermal stresses in an elastic thick plate containing an oblate spheroidal inhomogeneity, when the circle regions of radius d of the upper surface is heated and the one of lower surface is cooled. The solution is deduced with using thermoelastic displacement potential and Papkovich-Neuber displacement potentials. Numerical results are presented for different heat areas, inclusion shapes and sizes, and the stress distributions in the vicinity of the inhomogeneity are illustrated graphically.
The Japan Society of Mechanical Engineers, Japanese
DOI：https://doi.org/10.1299/kikaia.70.740DOI ID：10.1299/kikaia.70.740,
ISSN：0387-5008,
CiNii Articles ID：110004998752,
CiNii Books ID：AN0018742X Stresses in a Thick Plate Containing an Oblate Spheroidal Inclusion Under Transverse Bending Ying Zheng; Eiichiro Tsuchida; Yoshio Arai
Theoretical and Applied Mechanics Japan,
Volume：53,
First page：49,
Last page：62, 2004
DOI：https://doi.org/10.11345/nctam.53.49DOI ID：10.11345/nctam.53.49 偏平回転だ円体状介在物を有する厚板の曲げ 鄭穎; 土田栄一郎; 荒居善雄
Volume：68,
Number：676,
First page：1753,
Last page：1761, 2002
DOI：https://doi.org/10.1299/kikaia.68.1753DOI ID：10.1299/kikaia.68.1753,
ISSN：0387-5008,
CiNii Articles ID：110002370255 偏平回転だ円体状介在物を有する厚板の軸対称曲げ 土田栄一郎; 荒居善雄; 鄭穎
Volume：68,
Number：668,
First page：631,
Last page：637, 2002
DOI：https://doi.org/10.1299/kikaia.68.631DOI ID：10.1299/kikaia.68.631,
ISSN：0387-5008,
CiNii Articles ID：110002370123 偏平回転だ円体状介在物を有する厚板の曲げ 鄭穎; 土田栄一郎; 荒居善雄
日本機械学會論文集. A編,
Volume：68,
Number：676,
First page：1753,
Last page：1761, 2002
DOI：https://doi.org/10.1299/kikaia.68.1753DOI ID：10.1299/kikaia.68.1753,
ISSN：0387-5008,
CiNii Articles ID：110002370255 偏平回転だ円体状介在物を有する厚板の軸対称曲げ 土田栄一郎; 荒居善雄; 鄭穎
日本機械学會論文集. A編,
Volume：68,
Number：668,
First page：631,
Last page：637, 2002
DOI：https://doi.org/10.1299/kikaia.68.631DOI ID：10.1299/kikaia.68.631,
ISSN：0387-5008,
CiNii Articles ID：110002370123
Ying Zheng, Eiichiro Tsuchida and Yoshio Arai Thermal Stresses in a Thick Plate Containing an Oblate Spheroidal Inhomogeneity with the Circle Regions of both Plate Surfaces being Heated and Cooled
2005
Influence of surface finishing upon seizure in gas bearing
2005
Influence of rotating speed upon seizure in gas bearing
2005
Ying Zheng, Eiichiro Tsuchida and Yoshio Arai Thermal Stresses in a Thick Plate Containing an Oblate Spheroidal Inhomogeneity with the Circle Regions of both Plate Surfaces being Heated and Cooled
Theoretical and Applied Mechanics Japan, 2005
Influence of surface finishing upon seizure in gas bearing
Proceeding of KSME-JSME Joint International Conference on Manufacturing, Machine Design and Tribology, 2005
Influence of rotating speed upon seizure in gas bearing
Proceedings of KSME-JSME Joint International Conference on Manufacturing, Machine Design and Tribology, 2005
上面加熱下面冷却される偏平回転楕円体状介在物を有する厚板の定常熱応力 日本機械学会論文集
2004
Stresses in a Thick Plate Containing an Oblate Spheroidal Inclusion Under Transverse Bending
2004
上面加熱下面冷却される偏平回転楕円体状介在物を有する厚板の定常熱応力 日本機械学会論文集
2004
Stresses in a Thick Plate Containing an Oblate Spheroidal Inclusion Under Transverse Bending
Theoretical and Applied Mechanics Japan, 2004
Thermal Stresses in a Thick Plate Containing an Oblate Spheroidal Inhomogeneity with the Circle Regions of both Plate Surfaces being Heated and Cooled
2003
Stresses in a Thick Plate Containing an Oblate Spheroidal Inclusion Under Eigenstrain with a Uniform Gradient
2003
Thermal Stresses in a Thick Plate Containing an Oblate Spheroidal Inhomogeneity with the Circle Regions of both Plate Surfaces being Heated and Cooled
Proceeding of The Fifth International Congress on Thermal Stresses and Related Topics (Thermal Stresses'03), 2003
Stresses in a Thick Plate Containing an Oblate Spheroidal Inclusion Under Eigenstrain with a Uniform Gradient
Theoretical and Applied Mechanics Japan, 2003
偏平回転だ円体状介在物を有する厚板の曲げ 日本機械学会論文集
2002
Stresses in a Thick Plate Containing an Oblate Spheroidal Inclusion Under Axisymmetric Bending
2002
偏平回転だ円体状介在物を有する厚板の軸対称曲げ 日本機械学会論文集
2002
偏平回転だ円体状介在物を有する厚板の曲げ 日本機械学会論文集
2002
Stresses in a Thick Plate Containing an Oblate Spheroidal Inclusion Under Axisymmetric Bending
Theoretical and Applied Mechanics Japan, 2002
偏平回転だ円体状介在物を有する厚板の軸対称曲げ 日本機械学会論文集
2002
