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The Scientific World Journal
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2014
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Article
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Fig 4
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Research Article
Structural Safety Analysis Based on Seismic Service Conditions for Butterfly Valves in a Nuclear Power Plant
Figure 4
Frequencies at each mode obtained by modal analysis.
(a)
92.7 Hz (1st mode)
(b)
96.4 Hz (2nd mode)
(c)
236.6 Hz (3rd mode)