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COMPLEX_FREQUENCY.html
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COMPLEX_FREQUENCY.html
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<html><head><link rel="stylesheet" type="text/css" href="style.css"/></head><body> <H2> <BR> *COMPLEX FREQUENCY </H2> <P> Keyword type: step <P> 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. <P> Finally, the number of eigenfrequencies requested should not exceed the corresponding number in the frequency step. <P> <P><P> <BR> <P> First line: <UL> <LI>*COMPLEX FREQUENCY </LI> <LI>use the required parameter CORIOLIS </LI> </UL> Second line: <UL> <LI>Number of eigenfrequencies desired. </LI> </UL> <P> <PRE>
Example:
*COMPLEX FREQUENCY,CORIOLIS
10
</PRE> <P> requests the calculation of the 10 lowest eigenfrequencies and corresponding eigenmodes. <P> <P><P> <BR> Example files: rotor. <P> </body></html>