PODReducedBasisSurrogate.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
 
#include "SurrogateModel.h"
 
class PODReducedBasisSurrogate : public SurrogateModel
{
public:
  static InputParameters validParams();
 
  PODReducedBasisSurrogate(const InputParameters & parameters);
 
  void evaluateSolution(const std::vector<Real> & params);
 
  void evaluateSolution(const std::vector<Real> & params,
                        DenseVector<Real> & inp_vector,
                        std::string var_name);
 
  const std::vector<DenseVector<Real>> & getApproximateSolution() const { return _approx_solution; }
 
  Real getNodalQoI(std::string var_name, unsigned int qoi_type) const;
 
protected:
  void initializeReducedSystem();
 
  void initializeApproximateSolution();
 
  void solveReducedSystem(const std::vector<Real> & params);
 
  void reconstructApproximateSolution();
 
  void reconstructApproximateSolution(DenseVector<Real> & inp_vector, std::string var_name);
 
  std::vector<std::string> _change_rank;
 
  std::vector<unsigned int> _new_ranks;
 
  std::vector<unsigned int> _final_ranks;
 
  std::vector<unsigned int> _comulative_ranks;
 
  const std::vector<std::string> & _var_names;
 
  const std::vector<std::string> & _tag_types;
 
  const std::vector<std::vector<DenseVector<Real>>> & _base;
 
  const std::vector<DenseMatrix<Real>> & _red_operators;
 
  DenseVector<Real> _coeffs;
 
  DenseMatrix<Real> _sys_mx;
 
  DenseVector<Real> _rhs;
 
  std::vector<DenseVector<Real>> _approx_solution;
 
  const Real _penalty;
 
  bool _initialized;
};