In this other discussion: https://groups.google.com/forum/#!topic/sympy/cvOjJdEWprM
I proposed to use the implementation of a variational evaluator that also gives the Euler-Lagrange equations. One of the test cases actually gives these equations for a composite cylinder using the classical lamination plate theory. you have to do something like: eq = test_cylinder_clpt() eq.integrands['u'] eq.integrands['v'] eq.integrands['w'] each value in the dictionary "integrands" correspond to one Euler-Lagrange. There will be one for each function under variation. You can check the code here: https://gist.github.com/saullocastro/6433919 Saullo On Wednesday, March 28, 2012 5:34:52 PM UTC+2, Brian Granger wrote: > > Hi, > > I know some of you are considering working on sympy.physics.mechanics > for GSoC projects. Last summer I began to create a module that gives > the Euler-Lagrange equations of motion for a Lagrangian. It would be > a great pre-GSoC project to complete to demonstrate your abilities. > Here is an issue that includes the current version of the module: > > http://code.google.com/p/sympy/issues/detail?id=3198 > > Even if this isn't completed as part of GSoC, we should finish this. > > Enjoy! > > Cheers, > > Brian > > -- > Brian E. Granger > Cal Poly State University, San Luis Obispo > [email protected] <javascript:> and [email protected] <javascript:> > > -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
