Comparative Vibration Analysis of a Parametrically Nonlinear Excited Oscillator Using HPM and Numerical Method

Figure 2

The result of HPM and RK, 𝑥̇(𝑡)  versus  𝑥(𝑡) at 𝜑 = 2, ε = 0.01, 𝑥(0)=0.1, 𝑥̇(0)=0.