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Journal of Applied Mathematics
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Journal of Applied Mathematics
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2012
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Article
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Tab 1
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Research Article
Approximate Super- and Sub-harmonic Response of a Multi-DOFs System with Local Cubic Nonlinearities under Resonance
Table 1
The first four natural frequencies.
Mode
Freq. (rad/s)
1
2.7502
2
6.6523
3
10.8492
4
15.0825