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Journal Articles

Propagation waveform characteristics of vibration and sound pressure due to single hole blastings in NATM tunnel

Takamura, Hiroaki*; Hamada, Hajime*; Sato, Toshinori

Dai-48-Kai Gamban Rikigaku Ni Kansuru Shimpojiumu Koenshu (Internet), p.13 - 18, 2022/01

In the stage blasting of a mountain tunnel, the condition of single hole initiation in which the effect of other stage does not enter was made by increasing the interval of initiation time between front and rear stages using an electron detonator, and the waveform of vibration and sound pressure at that time was measured. The knowledge obtained from the analysis of sound pressure waveform of single hole blasting is considered to be effective to be utilized for the examination of sound pressure reduction effect of controlled blasting and the analysis of error of noise prediction formula.

Journal Articles

PIV measurements of a complex turbulent flow in a short elbow piping under a high Reynolds number condition

Takamura, Hiroyuki*; Konno, Hiroaki*; Ebara, Shinji*; Hashizume, Hidetoshi*; Aizawa, Kosuke; Yamano, Hidemasa

Proceedings of 9th International Symposium on Particle Image Velocimetry (PIV '11) (USB Flash Drive), 6 Pages, 2011/07

Oral presentation

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 30; PIV measurement of single and dual elbow flow using 1/7-scale cold-leg experimental facility

Takamura, Hiroyuki*; Konno, Hiroaki*; Ebara, Shinji*; Hashizume, Hidetoshi*; Aizawa, Kosuke; Yamano, Hidemasa

no journal, , 

no abstracts in English

Oral presentation

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 31; Pressure fluctuation measurement of dual elbow

Konno, Hiroaki*; Takamura, Hiroyuki*; Ebara, Shinji*; Hashizume, Hidetoshi*; Aizawa, Kosuke; Yamano, Hidemasa

no journal, , 

no abstracts in English

Oral presentation

Evaluation of flow-induced-vibration in large-diameter pipings of a sodium-cooled fast reactor, 34; Analysis for time-averaged pressure and pressure fluctuation in dual elbow flow using 1/7-scale cold-leg experimental facility

Konno, Hiroaki*; Takamura, Hiroyuki*; Ebara, Shinji*; Hashizume, Hidetoshi*; Aizawa, Kosuke; Yamano, Hidemasa

no journal, , 

no abstracts in English

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