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Accession number;06A0058486
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| Title;EXPERIMENTAL AND NUMERICAL STUDIES ON STEEL PENSTOCK VIBRATIONS CAUSED BY PRESSURE PULSATIONS |
| Author;
YAMAMOTO KOSUKE
(Central Res. Inst. Of Electric Power Ind.)
NAKAMURA HIDEHARU
(Graduate School Of Engineering, Hiroshima Univ.)
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Journal Title;Struct Eng Earthqu Eng
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Journal Code:L4811A
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ISSN:0289-8063
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VOL.22;NO.2;PAGE.95S-106S (J-STAGE)(2005)
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| Figure&Table&Reference;FIG.15, TBL.4, REF.12 |
| Pub. Country;Japan |
| Language;English |
| Abstract;In our previous paper, we described vibrations with circumferential mode number n = 2 when a frequency of a pressure pulsation in a turbine coincides with the natural frequency of a steel penstock. We proposed the use of natural frequency calculation formulae based on numerical analyses that target n = 2, 3 vibrations. Because a limited number of papers are available describing experimental or analytical vibration studies, we performed 1/4 scale model experiments on pressure pulsations with the parameters of plate thickness and the presence of stiffeners. Based on a comparative study of experiments and numerical analyses, we proposed modification of the vibration prevention specifications stipulated in the current technical standard. (Author abst.) |
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