著者

福島 幸夫 中辻 弘幸 長尾 隆治 前村 孝志 長谷川 恵一

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会誌 (ISSN:00214663)

巻号頁・発行日

vol.46, no.535, pp.453-457, 1998-08-05 (Released:2010-12-16)

被引用文献数

1 1

著者

太田 豊彦 福島 幸夫 上條 謙二郎

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会誌 (ISSN:00214663)

巻号頁・発行日

vol.46, no.539, pp.705-711, 1998-12-05 (Released:2010-12-16)

参考文献数

4

被引用文献数

2

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National Space Development Agency of Japan (NASDA) started to develop H-II launch vehicle in 1983 and succeeded in the 1st flight on February in 1994. Meanwhile, several troubles were experienced in the development of LE-7 which is the 1st stage engine of H-II. The LE-7 is a staged combustion cycle engine with high pressure and high Isp like SSME. Therefore, high delivery pressure and high performance were required for LH2 turbopump, which is the main key component, and caused several troubles in the development. This paper describes the development of LH2 turbopump containing the design description, the contents of some troubles and their counterplans. In addition, some activities to solve turbopump life and endurance will be introduced.

著者

福島 幸夫 清水 隆三 梶浦 健治 西 俊明

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会誌 (ISSN:00214663)

巻号頁・発行日

vol.46, no.535, pp.436-441, 1998-08-05 (Released:2010-12-16)

被引用文献数

1

著者

長谷川 恵一 安藤 清 北出 正司 坂本 光正 福島 幸夫 沖田 耕一

出版者

一般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.61, no.588, pp.1713-1718, 1995-08-25

参考文献数

8

被引用文献数

2

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The LE-7 rocket engine main injector has undergone a few occurrences of welded joint structural failure because it is subjected to high thermal stress during the engine start and stop sequence. The low-cycle fatigue test and high-strain fatigue test which were conducted as part of failure analysis revealed that the welded joint has a considerably shorter fatigue life than expected. To improve the ductility and toughness of the welded joint, high-temperature-solution heat treatment was applied after welding. The low-cycle fatigue life of a welded joint subjected to this solution heat treatment became three times longer than that without it. A design criterion was established for low-cycle fatigue life estimation, and the life requirement was found to be satisfied.

著者

福島 幸夫 清水 隆三 梶浦 健治 西 俊明

出版者

日本航空宇宙学会

雑誌

日本航空宇宙学会誌 = Journal of the Japan Society for Aeronautical and Space Sciences (ISSN:00214663)

巻号頁・発行日

vol.46, no.535, pp.436-441, 1998-08

被引用文献数

2