3 0 0 0 OA アメリカズ・カップ挑戦艇〈阿修羅〉, 〈韋駄天〉の構造設計および建造
- 著者
- 木村 學 鵜沢 潔 成瀬 央 島田 明佳 影山 和郎 村山 英晶 高橋 太郎
- 出版者
- JAPAN SOCIETY FOR COMPOSITE MATERIALS
- 雑誌
- 日本複合材料学会誌 = Journal of the Japan Society for Composite Materials (ISSN:03852563)
- 巻号頁・発行日
- vol.27, no.2, pp.129-134, 2001-03-15
1 0 0 0 OA 光ファイバセンサによる大型複合材料構造のヘルスモニタリング
- 著者
- 村山 英晶 影山 和郎 成瀬 央 島田 明佳 鵜沢 潔
- 出版者
- 日本複合材料学会
- 雑誌
- 日本複合材料学会誌 (ISSN:03852563)
- 巻号頁・発行日
- vol.28, no.5, pp.176-188, 2002-09-15 (Released:2009-08-11)
- 参考文献数
- 14
- 被引用文献数
- 1 1
The purpose of structural health monitoring (SHM) is to lead a structure to be safer at a lower cost. In SHM, it is important to evaluate the actual state of the structure. Recently, fiber-optic sensors have been developed actively, and one can measure nearly all of the physical measurands of interest by them. Since they also have excellent characteristics such as high sensitivity, immunity from electromagnetic interference, good mechanical characteristics and distributed configuration, they have been applied to “smart structures.” Capability of quasi or fully distributed sensing is especially the significant advantage compared to conventional sensors. We have applied the fiberoptic distributed sensors to SHM in the field and we developed the integrated systems with the fiberoptic sensors and CAD/CAE for two large composite structures. These systems could give us useful information on the structural state, such as deformation and temperature during/after manufacture.
1 0 0 0 せばまりテーパ管内の脈動流
- 著者
- 鵜沢 潔 池尾 茂
- 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.51, no.472, pp.4230-4238, 1985-12-25
This paper deals with the laminar oscillatory flow of an incompressible fluid through a slightly convergent tube. The velocity distributions in the convergent tubes, whose convergent angles are in the range of 2~4°, are measured by a Laser Doppler Velocimeter. The flow in the convergent tube is numerically analysed by a finite difference method (SOR), without neglecting the convective terms in the Navier-Stokes equation. Experimental results agreed well with the numerical ones. The velocity profile of a laminar oscillatory flow in the convergent tube is quite different from the velocity profile in a straight tube of circular cross-section, even if the convergent angle is very small. The instantaneous pressure distribution in the convergent tube is uniform at each cross section as in a straight circular tube.