I opened this issue: https://github.com/sympy/sympy/issues/11967.
Jason moorepants.info +01 530-601-9791 On Wed, Dec 21, 2016 at 2:06 PM, Jason Moore <moorepa...@gmail.com> wrote: > The API is not well designed for applying potential energy from springs. > As a workaround, you can define the entire system's potential energy and > attach it to one of the bodies potential_energy attribute. The Lagrangian > will be properly calculated. Make sure not to double count any of the > potential energy components. > > The API probably needs a way to specify the potential energy expression > when calling the Lagrangian function. > > > > Jason > moorepants.info > +01 530-601-9791 <(530)%20601-9791> > > On Tue, Dec 20, 2016 at 12:58 AM, iai <i...@axelspace.com> wrote: > >> Please let me know how to model a spring that connects two rigid bodies. >> I am modeling a system of two rigid bodies connected by a torsion spring >> with damping, and trying to get equations of motion using >> LagrangesMethod(.). This system is free flying. >> >> I know I can assign the potential energy to a Particle object. But in my >> case above, I don't know how to divide the energy stored in a spring to the >> two bodies. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sympy+unsubscr...@googlegroups.com. >> To post to this group, send email to sympy@googlegroups.com. >> Visit this group at https://groups.google.com/group/sympy. >> To view this discussion on the web visit https://groups.google.com/d/ms >> gid/sympy/932e669d-4bb5-4b57-8503-12eef8f5caea%40googlegroups.com >> <https://groups.google.com/d/msgid/sympy/932e669d-4bb5-4b57-8503-12eef8f5caea%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAP7f1Ah0v0mOSoo3-qvLVnuq12_dez%3DUhO28LQVnW-_pHU5VGQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
