Iterative Homotopy Harmonic Balance Approach for Determining the Periodic Solution of a Strongly Nonlinear Oscillator

Table 1

Comparison of the exact and approximate frequencies (2nd-order) obtained by using different methods.

	This paper	HPM [16]	HPM [17]	HBM [11]	HBM [12]
	1.07079	1.06861	1.06991	1.06928	1.06341
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