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.