Hi hj, You want to use SCM as much as possible. We used it in the past for mud and almost rigid terrain (small sinkage). It’s pretty much an empirical approach. In general, SCM can run at Real Time Factor close to 1 (that is, real time). We do not have a FEA model – the Chrono continuum terrain model is solved with SPH and it’s called Continuous Representation Model (CRM). CRM is your next fastest choice, RTF is anywhere from 50 to 200. If you go to DEM, the RTF probably is going to reach into 1000. So, if you want to generate training data and need to get tons of data, try, in this order, SCM, CRM, DEM. See here<https://asmedigitalcollection.asme.org/computationalnonlinear/article-abstract/doi/10.1115/1.4056851/1156640/Real-time-Simulation-of-Ground-Vehicles-On?redirectedFrom=fulltext>, and here<https://www.authorea.com/doi/full/10.22541/au.167355891.12085319/v1>, for recent papers on this topic. For DEM, we’ll have a paper out soon, but for an older version, see here<https://www.mdpi.com/2227-9717/9/10/1813>. Good luck. Dan --------------------------------------------- Bernard A. and Frances M. Weideman Professor NVIDIA CUDA Fellow Department of Mechanical Engineering Department of Computer Science University of Wisconsin - Madison 4150ME, 1513 University Avenue Madison, WI 53706-1572 608 772 0914 http://sbel.wisc.edu/ http://projectchrono.org/ ---------------------------------------------
From: [email protected] <[email protected]> On Behalf Of hj Sent: Wednesday, March 1, 2023 2:52 PM To: ProjectChrono <[email protected]> Subject: Re: [chrono] Wheeled vehicle simulation on deformable terrain? Hi I had a question about using deformable terrain in Chrono. Maybe it's not chrono-specific but I aappreciate if I can have a feedback. I have a few research goals that I'd like to use Chrono for. Right now my work is to get data from tire (for now just tire and then the vehicle ) on deformable terrain to train RL or ML models. I started with SCM and rigid tire and my goal is to have data from different "types" of terrain such as soft and hard soil, snow, gravel, mud , etc. My question is for what type of terrain you think SCM would work the best to have the model close to real life? And for what type of terrain, I "have to" use DEM and granular terrain modeling methods? And for what type of terrian you think it's better to use FEA terrain? I appologize if my question is too long but I appreciate any feedback! Regards On Thursday, January 26, 2023 at 3:12:45 PM UTC-4 Radu Serban wrote: Yes, of course you can use wheeled vehicles on deformable terrain. There are demos in the Chrono distributions that illustrate that. Which particular deformable terrain formulation are you interested in? Finally, would you please let us know where in the tutorials is mentioned that only tracked vehicles work with deformable terrain?! --Radu From: [email protected] <[email protected]> On Behalf Of hj Sent: Thursday, 26 January 2023 19:43 To: ProjectChrono <[email protected]> Subject: [chrono] Wheeled vehicle simulation on deformable terrain? Hello I've been reading the chrono tutorial about deformable surface modeling. I was wondering if there is any way I can use Chrono for simulation of wheeled vehicle on a deformable terrain? It is mentioned in the tutorials that deformable terrain models only work with tracked vehicles! I appreciate any feedback ! Thank you -- 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/67c948f8-4d62-43cb-8b2d-bf4e59d0347fn%40googlegroups.com<https://groups.google.com/d/msgid/projectchrono/67c948f8-4d62-43cb-8b2d-bf4e59d0347fn%40googlegroups.com?utm_medium=email&utm_source=footer>. -- 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]<mailto:[email protected]>. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/48ed9365-641b-4a3a-918d-7e54721ae2can%40googlegroups.com<https://groups.google.com/d/msgid/projectchrono/48ed9365-641b-4a3a-918d-7e54721ae2can%40googlegroups.com?utm_medium=email&utm_source=footer>. -- 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/DM8PR06MB7703A7D045ED23EF59B7454AB1B29%40DM8PR06MB7703.namprd06.prod.outlook.com.
