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Abaqus

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dilaxsana

Student
Mar 12, 2023
5
My project is dynamic response of USP used in rail track using Abaqus software. I am doing this one with hyper elastic material model under the explicit analysis. But it take too much time to run this program and face some problems to solve this. Here I attached my CAE file. Can you help anyone to solve this model.
 
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What problems ? Are you getting some error messages ?

Also, there’s no file attached.
 
41_mnsfsn.jpg


here I attached my results validation graph.
I cannot upload my CAE file
 
It shows that too much variation between the experimental and numerical graphs. I can't find the correct reason for this, can you help me?
 
It seems that there's some large difference between the conditions of the physical test and the setup of the simulation. Perhaps boundary conditions are different than real-life supports or material behavior is not accurately represented but there can be many other reasons too.
 
please anyone give me a solution to this problem.
 
A few remarks after seeing your model:
- the analysis takes so long because of a long time of the first explicit step, if it's supposed to be quasi-static analysis then you should use mass scaling
- the mesh is very coarse, I would try with a significantly refined one
- it's not necessary to apply rigid body constraints to parts that are defined as discrete rigid and meshed with such elements as long as they have reference points assigned
- make sure that material properties (especially hyperelasticity and viscoelasticity) are correct, double-check their units
- check the warning messages generated after the analysis is submitted
- if you want to apply amplitudes to prescribed displacement BCs, you have to enter some non-zero value (usually 1 since it's multiplied by the amplitude) in selected DOF
 
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