著者

白鳥 敏正 松平 晏明 小西 奎二 桜井 忠一

出版者

社団法人日本機械学会

雑誌

日本機械学会論文集(B編) (ISSN:03875016)

巻号頁・発行日

vol.58, no.546, pp.182-187, 1992-02-25

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Scale model experiments were made to investigate the steady and unsteady airflow characteristics in an underground railway station. The experimental apparatus consists of a scale model of a two-layer underground railway station and train wind generators that simulate the steady and unsteady airflow caused by trains. The steady and unsteady airflows were measured with hotwire anemometers at several points of the station for several cases. The unsteady airflow patterns were almost identical to the estimated airflow patterns obtained from steady values. The method of reducing the train wind effect in a station by means of tunnel ventilation dynamic control was considered and its effectiveness was confirmed through experimentation.

著者

水野 将弘 山田 宏尚 武藤 高義

出版者

社団法人日本機械学会

雑誌

東海支部地区講演会講演論文集

巻号頁・発行日

vol.2001, pp.106-107, 2001

著者

綿貫 啓一 丸山 一男 大滝 英征

出版者

社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.58, no.546, pp.538-543, 1992

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Recently, the fine positioning system has been used in the mechanical industry, and has required the improvement of positioning accuracy, reduction of positioning time, increase of carrying capacity and so on. However, the existing control method for the positioning stage may cause delay of phase response or residual vibration when disturbance or overweight acts on the system or stage drives at high speed. In order to obtain the optimum control inputs, it is necessary to grasp the dynamic behaviour of the system precisely. First, this paper deals with the transient response of the positioning stage using the linear graph theory reported in the previous papers. The simulated results of transient response of the positioning stage are compared with the experimental ones, and they are found to be in good agreement. Next, a procedure which can reduce the settling time of positioning is proposed by utilizing this method. As a result, this procedure was able to reduce the settling time by 55%, as compared with only proportional control. 本文を読む・探す CiNii PDF他のリンク1図書館所蔵NII論文ID (NAID)110002380194NII書誌ID (NCID)AN00187463本文言語コードJPN資料種別論文NDL雑誌記事ID0162651700NDL記事分類機械の要素・機構学NDL雑誌分類ZN11(科学技術--機械工学・工業)NDL請求記号Z16-1056収録DBNDL NII-ELS書き出しRefer/BibIX形式BibTex形式タブ区切りテキスト (TSV)rights: 社団法人日本機械学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110002380194/

著者

影山 雄介 于 強

出版者

社団法人日本機械学会

雑誌

日本機械学會論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A (ISSN:03875008)

巻号頁・発行日

vol.70, no.695, pp.953-961, 2004-07-25

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本論文では,高度な軸制御が要求される工作機械の熱変形における補正制御に階層的応答曲面方から導かれる階層化された近似式を適用した例を示し,この手法の有効性を確認した.

著者

橋本 卓弥 平松 幸男 辻 俊明 小林 宏

出版者

社団法人日本機械学会

雑誌

日本機械学會論文集. C編 = Transactions of the Japan Society of Mechanical Engineers. C (ISSN:03875024)

巻号頁・発行日

vol.73, no.735, pp.3046-3054, 2007

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rights: 社団法人日本機械学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110006453882/

著者

塩澤 和章 小林 弘和 寺田 正夫 松井 明

出版者

社団法人日本機械学会

雑誌

日本機械学会論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.67, no.662, pp.1639-1646, 2001-10-25

参考文献数

12

被引用文献数

2 2 1

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As a study in a series to investigate the effect of anodized coating on fatigue strength of aluminum alloys, repeated tensile fatigue test was conducted in laboratory air and at room temperature under the stress ratio of 0.01 using smooth plate specimen of A2014-T6 and A6151-T6 with anodized film thickness of 3μm. Fatigue strength of the anodized specimens decreased by 20-30% as compared with those of uncoated one. Decrease of fatigue strength depended on static strength of the tested materials. The fracture of anodized coating film occurred at the critical strain formed by the accumulation of plastic deformation of substrate metal at an early stage of repeated tensile fatigue process and crack was induced in the substrate at the flaw of the anodized film. It was recognized that fatigue life of anodized specimens was quantitatively evaluated by the consideration of cyclic stress-strain response and strain-life fatigue behavior.

著者

菅 牧子 河村 哲也 岩津 玲磨

出版者

社団法人日本機械学会

雑誌

日本機械学会論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.65, no.629, pp.108-115, 1999-01

参考文献数

16

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The natural convection with large temperature difference is computed numerically using the Low-Mach-Number approximation with temperature dependent viscosity and thermal conductivity. In this study staggered grid system is used in order to hold down the numerical oscillation. Firstly, steady laminar natural convection above a horizontal heat source is simulated in order to validate the simulation method. The result is in good agreement with the analytical solution. Secondly, two dimentional flow field driven by two parallel heat sources is computed. This boundary condition may be regarded as a model situation of the big fire covering both sides of a wide straight road. At the same time, it is interesting to investigate interactions between two thermal plumes. The numerical results disclosed different flow behavior when the imposed temperature of the heat sources is changed and the rest of the governing system parameters are varied.

著者

鈴木 健太 渡邉 鉄也 田中 基八郎

出版者

社団法人日本機械学会

雑誌

日本機械学會論文集. C編 = Transactions of the Japan Society of Mechanical Engineers. C (ISSN:03875024)

巻号頁・発行日

vol.74, no.746, pp.2549-2554, 2008-10-25

参考文献数

8

被引用文献数

1

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rights: 社団法人日本機械学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf:http://ci.nii.ac.jp/naid/110006967447/Generally a coefficient of friction of a human finger is very higher than a coefficient of friction of metal. The physical characteristics of a human finger are important in the work by hand. Therefore, the physical and numerical modeling of fingertip is useful for the design of various equipments, for example, a handrail of stairs, a robot hand, an operation simulator, and so on. In this study, "Coulomb friction", "absorption by fingerprint and sweat" and "elasticity of finger" are considered as the element of the friction characteristics. The aim of this study is to express the force by these characteristics as function model and to make the physical fingertip model. At first, the force by friction and absorption are measured, and the contact area between fingertip and board is calculated. Next, the function of friction force with respect to vertical force acting on the contact surface between fingertip and board is suggested. Finally, the actual finger model is made and the friction force is modeled to the function.