Hey Guys,
I have a problem on integrating process in ABAQUS.
in a very simple problem, I applied time history of acceleration as a boundary condition and got displacement of that boundray. Then I applied that time history displacement on the same boundray to reach same acceleration. But they were different.
Anybody knows what's the problem and how I can solve that?
Thanks all in adavance,
Reza
PhD candidate,
Civil Engineering Department
The university of Akron
Forums
Can you be more specifici
Can you be more specifici on the size of the difference?
Since Abaqus uses numerical intergration, there will almost always be a numerical error when calculating the displacement from a acceleration, or the other way around. Depending on your timestep this error can become larger.
A simple example of numerical integration can be found on wiki
http://en.wikipedia.org/wiki/Numerical_integration
Does this answer your question?