Is there any easier way of making tire blow out simulation?

Hi,

I am trying to run a tire blow out simulation. I made some research and it seems the easiest way to use Ftire with inflation pressure around 0 bars.

I got an ftire data with pressures with the tire tests were performed at 8.5 and 10 bars.

I would like to get your opinions about making the analyses with the extrapolation form 8.5 to 10 bars to 0 bars inflation pressures would be realistic or not.

During my research I couldn't find any study with Adams in tire blow out analyses, have you seen any study on tire blow out analyses in Adams? Is there any easier way?

Regards,

Yahya,

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0 Martin Kieltsch over 6 years ago

Who told you that you aren't allowed to edit a .tir file ? Didn't knew that alternative facts are already taking over the simulation world ....

Seriously: I do that all the time and it's not important which editor you you use.

Just delete the last part that says

$............preprocessed data (do not edit); cosin software version r14590 used

preprocessed_data =

If you don't have contact stiffness in your file, yet, then be careful with the values.

Defaults are much too high which will end with a tire shooting off to space or an aborted simulation. In passenger cars something in the few hundred to low thousands is realistic.

I have a tiretestrig plugin that should be available @ Scania. Use "Run vertical stiffness test" to obtain the attached plot.

If the tire is in a database you aren't allowed to write to: Copy it to one of your own databases and use the modified clone.

If it works as expected, send it to the database admin and tell him to put the new file in the public database.

Another way to skin the cat:

Use a GCON instead of a revolute joint (or a dummy part + a GCON) to constrain the wheel to the suspension upright. In that GCON you can use something like if(time-x: DXYZ(i,j),0,0) which will make the whole tire "coming loose" from the vehicle at time x. Not 100% what you wanted, but definitively the worst case and works with any tire model.
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0 Martin Kieltsch over 6 years ago

Who told you that you aren't allowed to edit a .tir file ? Didn't knew that alternative facts are already taking over the simulation world ....

Seriously: I do that all the time and it's not important which editor you you use.

Just delete the last part that says

$............preprocessed data (do not edit); cosin software version r14590 used

preprocessed_data =

If you don't have contact stiffness in your file, yet, then be careful with the values.

Defaults are much too high which will end with a tire shooting off to space or an aborted simulation. In passenger cars something in the few hundred to low thousands is realistic.

I have a tiretestrig plugin that should be available @ Scania. Use "Run vertical stiffness test" to obtain the attached plot.

If the tire is in a database you aren't allowed to write to: Copy it to one of your own databases and use the modified clone.

If it works as expected, send it to the database admin and tell him to put the new file in the public database.

Another way to skin the cat:

Use a GCON instead of a revolute joint (or a dummy part + a GCON) to constrain the wheel to the suspension upright. In that GCON you can use something like if(time-x: DXYZ(i,j),0,0) which will make the whole tire "coming loose" from the vehicle at time x. Not 100% what you wanted, but definitively the worst case and works with any tire model.
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