structural_buckling_eigenproblem_assembly.h

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/*
 * MAST: Multidisciplinary-design Adaptation and Sensitivity Toolkit
 * Copyright (C) 2013-2020  Manav Bhatia and MAST authors
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef __mast__structural_buckling_eigenproblem_assembly__
#define __mast__structural_buckling_eigenproblem_assembly__


// MAST includes
#include "base/eigenproblem_assembly.h"

namespace MAST {

    // Forward declerations
    class Parameter;
    
    
    class StructuralBucklingEigenproblemAssembly:
    public MAST::EigenproblemAssembly {
    public:
        
        StructuralBucklingEigenproblemAssembly();
        
        virtual ~StructuralBucklingEigenproblemAssembly();
        
        
        virtual void
        eigenproblem_assemble(libMesh::SparseMatrix<Real>* A,
                              libMesh::SparseMatrix<Real>* B);
        
        
        void set_buckling_data (bool use_linearized_approach,
                                MAST::Parameter& p,
                                const Real lambda1,
                                const Real lambda2,
                                libMesh::NumericVector<Real>& x1,
                                libMesh::NumericVector<Real>& x2);

        
        Real critical_point_estimate_from_eigenproblem(Real v) const;
        
        
        virtual void clear_discipline_and_system();
        

    protected:
        
        std::map<const libMesh::Elem*, RealVectorX> _incompatible_sol;
        
        
        bool _use_linearized_formulation;
        
        MAST::Parameter* _load_param;
        
        
        Real _lambda1, _lambda2;
        
        libMesh::NumericVector<Real> *_sol1, *_sol2;
        
        
        libMesh::NumericVector<Real> *_sol1_sens, *_sol2_sens;
    };
    
}


#endif // __mast__structural_buckling_eigenproblem_assembly__