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Question #214773 on Yade changed:
https://answers.launchpad.net/yade/+question/214773
Status: Open => Answered
Eugen Kubowsky proposed the following answer:
Hi Guys,
I think I know what confuses you. If I take a look at your python script, your simulation is a rather simple experiment. One sphere drops from a given height without any initial velocity to ground. Reaching ground it jumps up again but with less altitude - drops again and so on and so on.
Looking at your graphs, we see, that positions as well as velocities are roughly the same for Cundall and Hertz at least for t <=0,45.
But the graphs of forces are completely different. You have about 400N at Cundall and about 70N at Hertz.
Thats why you're confused I guess: how can velocities and positions be
roughly the same for that different forces.
I'm sorry, but I cant help you with that. But maybe it helps someone to
understand your problem.
Greetings, kubeu
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