force as a sine function

[Eser]

Hi All!

I would like to define a force in frequency domain as a sine function of the frequency. I am planing to use *amplitude option to define the sine function, but I am not so sure about it. Does anybody know how to manage this problem?

Thanks in advance,

Eser

 

[xerf]

Hi ,

I think you could use (in the case you are not using CAE)
the following code to define the amplitude:

AMPLITUTE ,NAME=my_amplitude_name, DEFINITION=PERIODIC
1,f,t0,A0
0,A1

where f=frequency, A0=value of free term in Fourier series, 0= coeficient of the first cosine term , A1=coeficient of the first sine term, t0=the initial time

You could see the Keyword Manual for other details.

Then you have to attach the amplitude definition to the load definition by setting the AMPLITUDE=my_amplitude_name
in the CLOAD or DLOAD definition.