Free Vibration of S.D.O.F System

Start the experiment with some default values of initial displacement, initial velocity, mass and stiffness of the system. Pause the experiment after a few cycles.

Observation 1:

  • Observe the time period and amplitude.
  • Modify the values of initial displacement and initial velocities.
  • Observe that the time period is independent of initial conditions

Observation 2:

  • Modify the value of mass and observe the change in time period.
  • Run the experiment for different values of mass and note the time period every time mass is changed
  • Check the graph between mass and time period.
  • Repeat the same with stiffness.
  • Change the structures stiffness (i.e., change column size) and observe the effect on time period.
  • Run the experiment for different values of stiffness and note the time period every time stiffness is changed.
  • Check the graph between stiffness and time period.
  • Again start the experiment this initial conditions.

Observation 3:

  • Add damping to the system (i.e., 5%) and run the experiment .
  • Observe the effect of damping on time period and amplitude.
  • Run the experiment for different values of damping(etta).
  • Check the graph between damping and time period.

Observation 4:

  • Add damping to the system (i.e., 5%) and run the experiment.
  • Run the experiment and stop after a few cycles.
  • Note the values of displacement on consecutive troughs and check the value of damping by logarithmic decrement formula.

NOTE: There are various features available for the graphs such as zoom, etc. The function/feature of each icon above the graphs becomes visible upon hovering over the concerned icon.