mambo5
Structural
- Dec 16, 2007
- 71
Hi all,
I modelled a beam subjected to fire, I applied all the elements temperatures input to my model as the experiment results. The fire test last 40 mins, I have the beam temperatures recorded every 1 minute in the test.
In the FE model, I used *AMPLITUDE to define the total time step of 10 (meaning to say, I have 0.25 time step interval, so that in the 10th time step = beam temperature at 40 mins). I used 10 time step simply because this is Abaqus's default value.
The analysis stopped at around 28 mins. Results shown 'good' agreement in term of beam temperatures vs beam deflection, but not in term of time vs beam deflection (see attached file).
Any idea how could I improve the time vs mid-span deflection results? Is there anything that I need to be aware of when I derive the time step in explicit analysis?
I modelled a beam subjected to fire, I applied all the elements temperatures input to my model as the experiment results. The fire test last 40 mins, I have the beam temperatures recorded every 1 minute in the test.
In the FE model, I used *AMPLITUDE to define the total time step of 10 (meaning to say, I have 0.25 time step interval, so that in the 10th time step = beam temperature at 40 mins). I used 10 time step simply because this is Abaqus's default value.
The analysis stopped at around 28 mins. Results shown 'good' agreement in term of beam temperatures vs beam deflection, but not in term of time vs beam deflection (see attached file).
Any idea how could I improve the time vs mid-span deflection results? Is there anything that I need to be aware of when I derive the time step in explicit analysis?