fedoo.weakform.ImplicitDynamic

class ImplicitDynamic(constitutivelaw, density, beta=0.25, gamma=0.5, name='', nlgeom=False, space=None)

Weak formulation for implicit dynamic problem.

Similar as the fedoo.weakform.StressEquilibrium weak formulation with the adition of inertia effect. The inertia effects are introduced using an Implicit Newmark Scheme.

Parameters:

  • constitutivelaw (ConstitutiveLaw name (str) or ConstitutiveLaw object) – Material Constitutive Law (fedoo.constitutivelaw)

  • density (float, np.array(float)) – Material density as constant value or array of gausspoint values

  • beta (float) – Newmark parameters. Default values use the average acceleration method.

  • gamma (float) – Newmark parameters. Default values use the average acceleration method.

  • name (str) – name of the WeakForm

  • nlgeom (bool, 'UL' or 'TL', optional) – If True, the geometrical non linearities are activate based on the updated lagrangian method. If nlgeom == ‘UL’ the updated lagrangian method is used (same as True). If nlgeom == ‘TL’ the total lagrangian method is used. If not defined, the problem.nlgeom parameter is used instead.

  • space (ModelingSpace) – Modeling space associated to the weakform. If None is specified, the active ModelingSpace is considered.

__init__(constitutivelaw, density, beta=0.25, gamma=0.5, name='', nlgeom=False, space=None)

Methods

ImplicitDynamic.get_all()

Return the list of all weak forms.

ImplicitDynamic.get_weak_equation(assembly, pb)

ImplicitDynamic.initialize(assembly, pb)

ImplicitDynamic.nvar(self)

Return the number of variables used in the modeling space associated to the WeakForm.

ImplicitDynamic.reset()

ImplicitDynamic.set_start(assembly, pb)

ImplicitDynamic.sum(wf1, wf2)

ImplicitDynamic.to_start(assembly, pb)

ImplicitDynamic.update(assembly, pb)

ImplicitDynamic.update_2(assembly, pb)

ImplicitDynamic.name

Return the name of the WeakForm.

ImplicitDynamic.nlgeom

ImplicitDynamic.space

Return the ModelingSpace associated to the WeakForm if defined.