link 180 and file results analyze modale leaks

[Michele1980]

Bye to all,

I am trying to calculate ways of vibrating a structure of poles, which besides being bound to the ground, has tyrants.
for the palo elements I use the beams, while for the tie rods I am using the link180.

When I launch the analysis, it tells me that it was performed, but when I go to read the results, it tells me that the file is empty.

I tried to delete the link180 items and the calculation was executed, plus calculation of the results and writing of the rst file.

Where am I wrong?

 

[Michele1980]

ps: how solutor use block-lanzos

 

[stefano.garbin]

That's weird. I don't have a great experience in modal analysis, but something stinks me.
if instead of a modal analysis launches a simple structural static analysis what happens? Did you forget to put some real constants? the real constant are 2: the area of the link180 and the mass per unit of length.

 

[Michele1980]

si ho provato ad eseguire anche la statica e non mi dà nessun risultato.

sono riuscito ad ottenere qualcosa con il supernode, ma è un solutore che non conosco e non so come usarlo.

con questo solutore ho ottenuto frequenze di 1hz e 2hz 5hz 6hz, ma mi sembrano valori strani...

questi sono i warning del file di error lanciando il lanczsos

*** warning *** cp = 3.026 time= 12:40:35
no shape testing has been performed on 80 of the 121 selected elements.
to perform shape testing on these elements and see any warning
messages about the others, please issue the check command.

*** warning *** cp = 3.385 time= 12:40:37
repeated lanczos shift and factorize steps did not yield additional
eigenvalues in the requested frequency range. either the eigenvalues
are widely separated or, there are only 0 eigenvalues in the frequency
range specified (freqb and freqe in modopt command).

*** warning *** cp = 3.385 time= 12:40:37
there are no modes in the specified range.