Hi I've spent the past few weeks working on creating a model using Project Chrono to place bounds on a rather catastrophic failure mode in an electric scooter I have purchased. The project has given me some reasonable results, and is a more in-depth description is available on the project's Github page: https://github.com/keonjoe/Nami-Simulator
There is still some work to be done on the correlation side and tweaks to the contact model to be made. In this regard, I do have a few questions: 1. Could somebody please comment on how accurate the standard Hertzian contact model has been for handling the vertical forces (i.e. from hitting a sharp bump) from tire-road contacts? Are there any recommendations for how to tweak the contact model to better approximate the behavior of a tire over a bump if the Hertzian contact model is not a good fit for this application? 2. I noticed that when using a lower stiffness value for the ChElementBeamIGA elements I used to create a part in my model that some spurrious low frequency oscillations are present. When I was working at GT helping customers troubleshoot these types of issues in their models, the solution was usually to increase the alpha term in the material Rayleigh damping model. However, I noticed in the comments in the code that it is not possible to apply the alpha Rayleigh damping term. Is there an explanation for why this cannot be done for ChElementBeamIGA? Surely there is a mass matrix being assembled at some point in the solution process on which the alpha term can be applied. Thank you in advance for your help! Qiyuan -- 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/5263e0a8-e0d7-46ea-a836-0ade0ca12f78n%40googlegroups.com.
