Table 1:
(a) Harmonic term convergence for various amplitudes (1st resonant frequency). (b) Harmonic term convergence for various amplitudes (2nd resonant frequency).
(a)
Homotopy perturbation
No. of harmonic terms = 1
2
3
0.64348
0.64347
0.64347
0.6
0.66140
0.66140
0.66094
0.66091
1
0.67759
0.67759
0.67641
0.67619
1.4
0.68721
0.68721
0.68580
0.68530
(b)
Homotopy perturbation
No. of harmonic terms = 1
2
3
1.07786
1.07784
1.07784
0.6
1.19539
1.19539
1.1936
1.19356
1
1.40661
1.40661
1.4005
1.40024
1.4
1.66715
1.66715
1.65219
1.6600