ElementJacobianDamper.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html
 
#pragma once
 
// Moose Includes
#include "GeneralDamper.h"
#include "MooseVariable.h"
 
// Forward Declarations
class FEProblemBase;
class MooseMesh;
class DisplacedProblem;
 
class ElementJacobianDamper : public GeneralDamper
{
public:
  static InputParameters validParams();
 
  ElementJacobianDamper(const InputParameters & parameters);
 
  virtual void initialSetup() override;
 
  virtual Real computeDamping(const NumericVector<Number> & /* solution */,
                              const NumericVector<Number> & update) override;
 
  bool probeDamping(const NumericVector<Number> & update,
                    Real damping,
                    Real & max_difference,
                    std::string & error_message);
 
protected:
  THREAD_ID _tid;
  Assembly & _assembly;
 
  const QBase * const & _qrule;
 
  const MooseArray<Real> & _JxW;
 
  FEProblemBase & _fe_problem;
 
  MooseSharedPointer<DisplacedProblem> _displaced_problem;
 
  MooseMesh * _mesh;
 
  std::vector<MooseVariable *> _disp_var;
 
  unsigned int _ndisp;
 
  std::vector<VariableValue> _disp_incr;
 
  const Real _max_jacobian_diff;
 
  const bool _use_backtracking;
 
  const Real _backtrack_factor;
 
  const unsigned int _max_backtrack_steps;
};