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Matsumoto Nobuhiko,Miyake Toshitake,Kondoh Mikio,Ando Kimihiko,Tanino Hitoshi 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
The high pressure compaction without internal lubricant and the high green density even with the pore free density were achieved by the newly developed die wall lubricant for warm compaction. This developed die wall lubricated warm compaction followed by high temperature sintering resulted in not only the superior mechanical property but also the low dimensional change. In this paper, the effects of increasing the green density on the sintered density, the dimensional change and the mechanical property are mainly discussed
On the flutter characteristics of separated two box girders
Matsumoto, Masaru,Shijo, Rikuma,Eguchi, Akitoshi,Hikida, Tetsuya,Tamaki, Hitoshi,Mizuno, Keisuke Techno-Press 2004 Wind and Structures, An International Journal (WAS Vol.7 No.4
The flutter characteristics of long span bridges are discussed from the point of the unsteady pressure distribution on bridge deck surface during heaving/torsional vibration related to the aerodynamic derivatives. In particular, it is explained that the coupling terms, which consist of $A_1^*$ and $H_3^*$, play a substantial role on the coupled flutter, in comparison with the flutter characteristics of various structural sections. Also the effect of the torsional/heaving frequency ratio of bridge structures on the flutter instability is discussed from the point of the coupling effect between heaving and torsional vibrations.