著者

野口 尚一

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.75, no.646, pp.1462-1463, 1972-10

著者

織田 剛 満田 正彦 山極 伊知郎 田中 俊光 名倉 隆雄 大石 峰生

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.64, no.620, pp.1127-1134, 1998-04-25

---

Two-dimensional axi-symmetric Euler equations are solved in order to simulate the compression wave induced by a high-speed train entering a tunnel or a tunnel entrance hood. Pressure and pressure gradient histories at the tunnel entrance obtained from the calculation are compared with experimental results. It can be found that calculated results and experimental results are well corresponding each other. The effect of the cross-sectional area of the tunnel entrance hood is numerically investigated by this calculation method. Then, propagation of the compression wave along the tunnel is one-dimensionally calculated by a double mesh method which induces little numerical diffusion.

著者

城田 農 真田 俊之 荒田 康弘 渡部 正夫 亀田 正治

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.73, no.726, pp.467-473, 2007-02-25

被引用文献数

3

---

The mechanism of a bubble production method using controlled gas pressure fluctuation, originally developed by Kariyasaki and Osaka [Trans. JSME, Series B, Vol.68, No.674, (2002)1, is further investigated using high-speed photography. We found out more appropriate pressure fluctuation than that of Kariyasaki and Osaka in producing single bubble. The radius of bubbles can be varied from about 0.3 to 0.8 mm with extremely small standard deviation of less than 1μm. Shrinking motion of a capillary bridge connecting a bubble and a nozzle was observed in detail. Force balance on a growing bubble which is based on a spherical bubble formation model is also estimated. As a result, we reveal that when gas pressure is decreased the capillary bridge is sucked down into a nozzle and upward added mass force is applied on a bubble, both of which cause the detachment of a bubble from a nozzle.

著者

合志 剣之助 中村 仁彦 岡田 昌史

出版者

一般社団法人日本機械学会

雑誌

ロボティクス・メカトロニクス講演会講演概要集

巻号頁・発行日

vol.2003, 2003

---

医療やスポーツの分野などで筋骨格人体モデルのシミュレーションが有用であるが, 人の動きの制御系の設計が問題となる。本研究では, 人体のような大自由度系のコントローラとして, ヒューマノイド等の力学特性の似た低自由度系のコントローラを適用する方法を提案する。

著者

古本 勇記 山根 克 中村 仁彦

出版者

一般社団法人日本機械学会

雑誌

ロボティクス・メカトロニクス講演会講演概要集

巻号頁・発行日

vol.2000, 2000

---

近年, 情報メディアの中心になるであろう動画作成の手段としてCGが注目を集めているが, CGでは人間などの生体の自然な動作を再現することに莫大な時間と労力を要する。そのため容易に人間動作生成を行なうための研究が進められているが, 本研究ではそれらを踏まえて, より人間らしい動作の生成を目的とし, CG上のキャラクタに力を入力として加えることでよろめく, 踏みとどまる, といった動作の生成をインタラクティブに行なうことを試みる。

著者

柳澤 秀吉 KOSTOV Vlaho 福田 収一

出版者

一般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.67, no.657, pp.1682-1688, 2001-05-25

被引用文献数

7

---

A method for supporting industrial design with special attention paid to the diversity of Kansei was proposed to respond to the quickly diversifying customers' requirements. As Kansei is very individualistic in nature, a new approach is needed to accommodate the difference from person to person to really reflect the customer's preference In terms of Kansei or his or her personal evaluation Kansei feature. Therefore, such a method was developed which creates a different Kansei space for each different user, by applying a semantic differential method and a principal component analysis to the impression words. A prototype system was developed with cellular phones as samples and the usefulness of our method was demonstrated.

著者

立石 哲也 白崎 芳夫 島村 昭治 勝世 敬一

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.45, no.396, pp.823-835, 1979-08-25

---

合目的な海綿骨の構造と特性を材料工学的に応用することを目的とするソフトメカニクス研究の第一歩として,粘性流体を充てんした多孔質粘弾性体の力学モデルを提案し,これを用いて水,関節液,タービン油,バクトラ油などの粘性流体を含浸した多孔質ポリプロピレンの衝撃吸収性と過重支持性を理論的に明らかにすると共に将来の軟機械用材料に欠くことのできない機能的な可変モジュラス材料の設計の指針を与えた.

著者

VU Phong Hai 西田 修身 藤田 浩嗣 原野 亘 板倉 弘樹 福田 泰弘

出版者

一般社団法人日本機械学会

雑誌

関西支部講演会講演論文集

巻号頁・発行日

vol.2002, no.77, pp."5-1"-"5-2", 2002

---

Blending pyrolitic oil (or Waste Plastic Disposal, called WPD for short) produced from household and industrial plastic wastes with bitumen, which is 70% (v) of orimulsion, reduces the viscosity of the oil. The experimental results indicated that, the WPD mixing ratio of 20% (v) reduces the bitumen's viscosity from more than 500 cSt to 20 cSt at 50℃. The blended oil has been applied to a small size high-speed single-acting 4 stroke diesel engine (14 kW, 2200rpm) without preheating the oil. The engine test with non-preheated blended bitumen has proved the possibility of WPD-blended bitumen as a fuel for diesel engines. In order to improve the engine performance the far-infrared filter has been tested. The engine test result has shown the good effect of the filter on the engine performance.

著者

佐治 愿

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.109, no.1047, 2006-02-05

著者

山口 貫一

出版者

一般社団法人日本機械学会

雑誌

機械學會誌

巻号頁・発行日

vol.31, no.134, pp.191-193, 1928-06-20

著者

グダラズィ モハマド 久保木 孝 村田 眞

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2005, no.1, pp.619-620, 2005-09-18

---

In order to minimize the space of bent tubular parts, a bending technology with small bending radii is requested. Tube shear bending is a suitable technology to realize a considerable small bending radius, which is very difficult to be manufactured with common cold-bending methods. It can be applied as an effective means when space limitation is a main design factor. Utilizing the shear bending process, production of compact and unified elbow tubular parts is feasible. In this paper, the procedure of tube shear bending has been introduced. Also, an elasto-plastic 3D simulation analysis for shear bending process of circular tubes was undertaken. As the result, the deformation behavior of tube as well as the effect of pushing force have been clarified.

著者

片山 優希 久貝 克弥

出版者

一般社団法人日本機械学会

雑誌

バイオエンジニアリング講演会講演論文集

巻号頁・発行日

vol.2007, no.20, pp.285-286, 2008-01-24

著者

中別府 修 土方 邦夫 CHANDRACHOOD Madhavi LAI Jie MAJUMDAR Arun

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.62, no.593, pp.284-290, 1996-01-25

被引用文献数

5

---

A new technique, which uses the Atomic Force Microscope (AFM) coupled with a micro-thermocouple cantilever, for measurement of microscale temperature profile has been developed. Topological and thermal images of any solid sample can be obtained simultaneously by this technique. Using a handmade thin-wire thermocouple and a thin-film thermocouple deposited on a commercially available Si_3N_4 cantilever, some working small electric devices were measured in both air and vacuum. Since heat conduction through the air between the sample and the probe was dominant in air, clear but distorted thermal images were obtained. In vacuum, heat transfer through the contact point between them was so small that a signal to noise ration was low and the conventional signal amplifying technique was not helpful. The Lock-in technique was employed to detect such small signals and finally, a true temperature image of sample surface was acquired. Also, the thermal environment surrounding the cantilever in the AFM is discussed in this paper.

著者

佐治 愿

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.107, no.1032, 2004-11-05

著者

西崎 祐輔 瓜田 明 田中 周治

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2002, no.3, pp.335-336, 2002-09-20

---

Aerodynamic characteristics and near-field flow fields of rectangular flat-plate wings with very small aspect ratios, λ=1∿0.05 at full angles of attack, α=0∿90 deg, have been presented. The flow details were investigated using oil film flow visualization and PIV measurements. The typical features of surface flows on wings with various aspect ratios can be classified into 6 types, i.e., un-separated(US), partially separated(PS-1) with U-type flow reattachment, PS-2 with O-type reattachment, PS-3 with long cigar-type reattachment, PS-4 with indistinct reattachment and fully separeted(FS). The aerodynamic characteristics and near-flow structures of test wings can be classified into three groups corresponding to their aspect ratios, which are (1) small aspect ratio wing (λ=1), (2) smaller aspect ratio wings (λ=0.75∿0.66) and (3) very small aspect ratio wings (λ=0.5∿0.05). It has been confirmed that the aerodynamics and detailed flow structures investigated exhibit very close correlations.

著者

西崎 祐輔 瓜田 明 田中 周治

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2003, no.2, pp.341-342, 2003-08-05

---

3 dimensional wake structures behind rectangular flat-plate wings with aspect ratios of 0.1∿1.0 have been investigated using Laser Doppler Velocimeter and yaw-probe. Flow details, such as vorticity vectors and vortex lines in the wakes, have been analyzed for the 5 typical flow configurations (PS-1∿PS-4,FS), which were classified in the previous report from the measurements of aerodynamic characteristics and surface flow visualization. Trailing vortices are clearly formed for flow configurations, PS-1 and PS-2. Ring-type vortices are shed for FS. Vortex structures for PS-3 and PS-4 appear to be mixed types of trailing vortices and ring-type vortices.

著者

赤穂 良輔 伊井 仁志 肖 鋒

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2006, no.1, pp.91-92, 2006-09-15

---

Most of the existing numerical models for the simulation of Tsunami are based on the 2D shallow water equations. However, for many situations, it is necessary to use the 3D model in addition to the shallow water models to evaluate the damage in the coast region with a reliable accuracy. So, we propose the multi-scale warning system for Tsunami by connecting these models to cover the physical phenomena that have diverse scales in both time and space. In this paper, we present the formulation of the 2D shallow water wave model based on the CIP/MM-FVM with the MOC. In addition, we construct the formulation for the source term preserved the fundamental balance between the source term and the flux gradient. Finally, we apply the present model to some "real-case" numerical experiments.

著者

赤穂 良輔 伊井 仁志 紫牟田 将一 肖 鋒

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2005, no.1, pp.111-112, 2005-09-18

---

Most of the existing numerical models for the simulation of Tsunami are based on the 2D shallow water equations. However, for many situations, it is necessary to use the 3D model in addition to the shallow water models to evaluate the damage in the coast region with a reliable accuracy. So, we propose the multi-scale warning system for Tsunami by connecting these models to cover the physical phenomena that have diverse scales in both time and space. In this paper, we present the formulation of the 2D shallow water wave model based on the CIP/Multi-Moment concept and the theory of characteristics. As the first step of this system, we apply CIP-CSL scheme to the rectangular structured grid and the triangle unstructured grid.

著者

落合 芳博 小林 正

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.64, no.628, pp.2914-2919, 1998-12-25

被引用文献数

3

---

Elastoplastic problems can be easily solved by the boundary element method. However, even if BEM is used, domain integrals are necessary for elastoplastic problems. The conventional multiplereciprocity boundary element method cannot solve the elastoplastic problem, because the distribution of initial stress or initial strain cannot be given analytically. This paper shows that the elastoplastic problem can be solved without the domain integral by the improved multiple-reciprocity boundary element method. In this method, the distribution of initial stress is interpolated using a boundary integral equation. A new computer program was developed and applied to several elastoplastic problems.

著者

一宮 浩市 武田 哲明 植村 拓也 範国 哲也

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.72, no.723, pp.2747-2752, 2006-11-25

被引用文献数

1

---

This paper describes the heat transfer and flow characteristics of a heat exchanger tube filled with a high porous material. Fine copper wire (diameter: 0.5mm) was inserted in a circular tube dominated by thermal conduction and forced convection. The porosity was from 0.98 to 1.0. Working fluid was air. Hydraulic equivalent diameter was cited as the characteristic length in Nusselt number and Reynolds number. Nusselt number and friction factor were expressed as functions of Reynolds number and porosity. Thermal performance was evaluated by the ratio of Nusselt number with and without a high porous material and the entropy generation. It was recognized that the high porous material was effective in low Reynolds number and the Reynolds number which minimized the entropy generation, existed.