Updates on this question for who may headache about this: I have tried to read header files and modify several ".json" files to see if those could help and finally, the solution was to directly scaling (it's a nasty way for test, if you want to model your vehicle, you should design a new one by yourself) the ".obj" file, and the tire size changed which you can obviously see in the picture below!
[image: Screenshot from 2024-09-05 13-19-17.png] It is easy to see from the footprint that the width doesn't match well to the new size, so that might be something you need to deal with ".json" file or others. Also, the stress distribution seems already changed (color difference), the reason of it is still unknown. But, anyway, questions about tire size are solved now, hope this will help those who have the same confusion about this like me. Best, Chen On Wednesday 4 September 2024 at 16:38:48 UTC+8 ychen_441 wrote: > Or maybe modifying the parameters in the ".json" file indeed changes tire > properties but at the same time, > visualization is governed by ".obj" file so I can't see any differences? > > Chen > > On Wednesday 4 September 2024 at 16:13:36 UTC+8 ychen_441 wrote: > >> Hey colleagues, >> >> Might be a dumb dumb question but it cost me a little bit longer time >> than I expected. >> >> How to modify the size of a tire? >> >> - When I was trying the demo "demo_VEH_DeformableSoil.py", there was >> a "Dlobal parameter for the tire", but the operation of changing the >> value >> there only led to the starting position of the tire changed. >> - How to change the tire size here? I have noticed that there was >> a ".obj" file used in the later codes of that demo but the file seems >> to be >> more of a mesh generation stuff I guess? Is the tire size fixed by the >> ".obj" file? >> - In another case, when playing HMMVV and citybus demos, I saw their >> tire type is set by the function "SetTireType()" and details can be found >> in CPP reference. So I thought this might be a ".json" settings, and I >> changed the value of tire radius and width in "HMMVV_RigidTire.json" but >> nothing happened. >> - What about this scenario? Is there a way to change tire size >> within a vehicle system? (different from the former one using a single >> wheel) >> >> Forgive me being stupid but I will be grateful if anyone can provide some >> suggestions. >> >> Thanks, and all best, >> Chen >> > -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/4f9ebe83-4260-4fe1-adb4-ceef4d4d5099n%40googlegroups.com.
