In this lab we will study the forced Duffing oscillator, a 2 degree of freedom oscillator with cubic stiffness. x’’ + ax’ + x The oscillator can exhibit chaotic (i.e. irregular) oscillations. In the applet below you need to enter the following - The no. of time steps for the simulation.
- The time step size.
- The no. of frames displayed each sec. Increase this for a faster simulation speed.
- The damping parameter a (0 < a < 1) and forcing parameter b (0 < b < 1). Try (a = 0.15, 0.25, b = 0.3)
- The initial conditions x(0) and x'(0). Try different combinations.
Click the Restart button to redraw the phase plot i.e. plot velocity against displacement. |

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