I'm attempting to model a moving ground in Adams/Car. A moving ground is for instance a suspension bridge or a floating bridge that is subjected to environmental excitation. Is there a method to model a floating bridge using the road builder module ?

I have the necessary excitation data signals that need to be applied to this moving ground. I will then subject this to a full-vehicle simulation to investigate vehicle dynamics. However, so far, I wasn't successful in finding any posts or threads that deal with this topic and I've hit a dead-end. Could someone please help or provide advice?

0 Micha over 4 years ago

Unfortunately, I cannot help you with Adams' road builder (I think all the experts are listening anyway).

But I *could* help you with FTire and its own road models. We provide many ways to model stiff and flexible roads with height and friction profiles being location *and* time dependent. These dependencies can be defined by measured data, by analytic formulae for position or velocity, by time series read from files, etc. etc. Let me know if you need to learn more about it.

Michael
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0 prasiv over 4 years ago

Hello @Michael Gipser ,

Yes, I am interested to learn more about it. Please let me know how to take this forward.

Best regards,

Pramod
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0 Micha over 4 years ago

I attach relevant chapters of cosin's docu. Please note that usage of some of cosin's road models is only possible together with FTire, which in turn requires a license.

Michael

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cosin_road.pdf
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0 Micha over 4 years ago

more..

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cosin_rgr.pdf
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0 Micha over 4 years ago

more..

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cosin_io.pdf
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0 Martin Kieltsch over 4 years ago

Depending on what you want to study the most basic simulation would be a 4 poster (i.e. no road, but single excitation for each wheel).

If you have modeled the bridge by let's say the buoyancy of the ponton elements, then you'd like to define the road being on these floating parts and drive your vehicle over this obstacle.

That is only possible with FTire and requires some manual preprocessing.

We used that in the past to model a rollover ramp which was hydraulically launching the vehicle in the air while it was passing the ramp.
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