## *COMPLEX FREQUENCY

Keyword type: step

This procedure card is used to determine frequencies taking into account Coriolis forces (cf. Section 6.9.3). It must be preceded by a *FREQUENCY step in which the eigenvalues and eigenmodes are calculated without Coriolis (do not forget to use the option STORAGE=YES in the frequency step, ensuring that the eigenmodes and eigenvalues are stored in a .eig file). The frequency step does not have to be in the same input deck. There is one required parameter CORIOLIS.

Finally, the number of eigenfrequencies requested should not exceed the corresponding number in the frequency step.

First line:

• *COMPLEX FREQUENCY
• use the required parameter CORIOLIS
Second line:
• Number of eigenfrequencies desired.

Example:

*COMPLEX FREQUENCY,CORIOLIS
10


requests the calculation of the 10 lowest eigenfrequencies and corresponding eigenmodes.

Example files: rotor.