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A response spectrum can be defined entirely manually. A list of couples of values [frequency ; acceleration] or [period ; acceleration] must be input.
Name
Name of the spectrum, as it appears in the library and in the selection dropdown menus
Drawing type
Display and input mode of the spectrum.
Input type
Defines if the spectrum is defined manually or by a generator. In the current case, select Manual input.
Max frequency & Step
These two settings are used by spectrum generators only and cannot be edited when using manual input. The values of the spectrum are generated between a maximum period of 4 seconds (=0.25 Hz) and the input maximum frequency, using the input Step value.
Right-clicking in the top left corner of the table or on a row header (row number on the left) displays a context menu.
The options Insert new line, Delete line, Delete all lines, Clear line and Clear all lines are self-explanatory.
The options Copy all and Paste all allow to copy-paste the content of the table to/from an external application (e.g. Excel).
Paste external data into the table:
Copy data to the clipboard: