Re: Significance of control_timestep magnitudes

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Hi,
It is dynamic analysis by the following command.
>group_materi_density 0  8.e-3
Therefore, results are different if calculation time is changed.

In addition, how about adding the following command,
since it seems that a calculation error is large?

(control_timestep_iterations  120  1)
control_timestep_iterations_automatic 120 0.01 1.e-1 1.e-1

//
TANAKA Minoru
Nippon Institute of Technology

>Dear All,
>
>I have encountered strange (in my opinion) behaviour of Tochnog
>depending on the magnitude of the arguments to control_timestep.
>
>In my data file (in the attachment) I have a line:
>   control_timestep             120  1.e-1 1.e-1 
>
>but if I change it to 
>   control_timestep             120  1.e-2 1.e-2 
>
>I got different results. What is more with 
>   control_timestep             120  1.e-3 1.e-3 
>the results are again different.
>
>(The results for the last two cases seems to be a rubbish
>of some sort).
>
>The data describe an elastic bar in tension so there should 
>be no surprise.
>
>I would be very grateful if someone sheds some light on the 
>issues before I start digging in the code what is going on.
>
>Thank you for your support,
>
>Regards
>Roman
>
>-- 
>Roman Putanowicz, PhD  < [email protected]  >
>Institute for Computational Civil Engng (L-5)
>Dept. of Civil Engng, Cracow Univ. of Technology
>www.l5.pk.edu.pl, tel. +48 12 628 2569, fax 2034
>
>------------------------------------------------------------------------------

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