Time History Cosine Function Definition Form

See Time History {Type} Functions topic for details about using the form. The parameters for this type of definition are as follows:

The cosine time history function is a periodic function. A cosine function cycle starts at its positive maximum value (positive value of amplitude), proceeds to a value of 0, continues to its negative minimum value (negative value of amplitude), and returns to a value of 0 again and finally returns to it positive maximum value again. The following parameters are specified for the cosine time history function template.

Period edit box. Use the default or specify the time in seconds that it takes for the cosine function to complete one cycle.
Number of Steps per Cycle edit box. Use the default or specify the number of steps (i.e., function value points) provided for each cycle of the function.
Number of Cycles edit box. Use the default or specify the number of cycles in the function.
Amplitude edit box. Use the default or specify the maximum function value of the cosine function.

Access the Time History Cosine Function Definition form as follows:

Click the Define menu > Functions > Time History command to display the Define Time History Functions form. Then do one of the following:

- Select Cosine Function from the Choose Function Type to Add drop-down list and click the Add New Function button.
- Select a previously defined function and click the Modify/Show Function button.