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

<table>Accuracy of the results shown in Figure <a href="../fig2/">2</a>.</table>

Mathematical Problems in Engineering

fig4

Figure 4

Figure 4: Comparative Vibration Analysis of  a Parametrically 
                        Nonlinear Excited Oscillator  Using HPM and 
                        Numerical Method 

Figure 4 | Comparative Vibration Analysis of  a Parametrically 
                        Nonlinear Excited Oscillator  Using HPM and 
                        Numerical Method 

Mathematical Problems in Engineering

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

Figure 4