Research Article
High-Order Energy Balance Method to Nonlinear Oscillators
Table 2
Comparison of the first-, second-, and third-order frequencies for , .
| | | | [4]* | |
| 1 | 2.2798 | 2.2456 | 2.3184 | 2.27948 | 5 | 2.7318 | 2.6859 | 2.8062 | 2.73144 | 10 | 3.2057 | 3.1510 | 3.3166 | 3.20446 | 100 | 7.7762 | 7.6672 | 8.2006 | 7.77554 | 1000 | 23.7999 | 23.3957 | 25.0948 | 23.7045 |
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First-order approximation, = .
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