Comparison between Webshaker and 2DOF Model using Sinusoidal Input
About this Experiment:
This experiment compares data from the live Webshaker experiment to the result of the Two Degree of Freedom (2DOF) using Modal analysis to solve for the response of the 2-story shear frame.
The values for the 2DOF model: Natural Frequency fn1, Natural Frequency fn2, Modal Damping Ratio ζ1, Modal Damping Ratio ζ2, and Mode Shape Ø11, Ø12, Ø21, Ø22 are initial with default values. However, users can adjust these values to achieve a better match with the data from the Webshaker experiment.
The experiment uses a sinusoidal input as the base acceleration motion to the test structure during the experiment. The acceleration data for the sinusoidal input is converted to a voltage signal which is sent to the shake-table delivering the base motion to the test-structure.
Click here for a detail explanation of inputs for 2DOF program.
The values for the 2DOF model: Natural Frequency fn1, Natural Frequency fn2, Modal Damping Ratio ζ1, Modal Damping Ratio ζ2, and Mode Shape Ø11, Ø12, Ø21, Ø22 are initial with default values. However, users can adjust these values to achieve a better match with the data from the Webshaker experiment.
The experiment uses a sinusoidal input as the base acceleration motion to the test structure during the experiment. The acceleration data for the sinusoidal input is converted to a voltage signal which is sent to the shake-table delivering the base motion to the test-structure.
Click here for a detail explanation of inputs for 2DOF program.
Instructions:
To construct a sine wave, enter values for the amplitude and frequency of the wave as well as the duration (time). To construct a simulation for the 2DOF model, enter values for the Natural Frequency fn1, Natural Frequency fn2, Modal Damping Ratio ζ1, Modal Damping Ratio ζ2, and Mode Shape Ø11, Ø12, Ø21, Ø22. Then press the "Run" button. Limits are placed on the inputs in order to ensure that neither the shake table nor the model become damaged.
