Can someone tell me or provide an example of how a load that varies from 0 to a certain value can be applied using a growth ramp? And how can it be done in such a way that information is stored in the intermediate stages? (For example, an analysis of a cantilever beam with plastic behavior in which you want to store the displacement at the end for intermediate load values).
I’ve been reading about *AMPLITUDE but I don’t quite understand it, nor how to obtain this intermediate information.
Thanks for any input.
For intermediate results, you have to force the solver to make increments. After each successful increment, the results are stored in the .frd results file.
To do that, change the incrementation of the step to Automatic and reduce the max time increment to 0.1 if you want to get 10 increments in the step time equal to 1. Dy default the load will ramp from 0 at time 0 to 100 % at time 1.
Amplitude definition is needed only when you want to use non-default load/BC time variation (linear ramp in static/steady-state steps, immediate application and keeping constant in dynamic/transient steps). You specify time vs amplitude values, then select the amplitude by name in load/BC definition and at each time the corresponding amplitude value is multiplied by the load/BC magnitude.
Apart from controlling the incrementation (e.g. using lower maximum increment size to get more result frames) with output set to every increment by default, you could also use the *TIME POINTS custom keyword to specify exactly at which moments in time the results should be written.
Thank you very much for your comments. I’ll try them out.