KOKO\Mimi
54 lines
2.0 KiB
C++
54 lines
2.0 KiB
C++
#ifndef FESA_CONSTRAINTS_ESSENTIAL_CONSTRAINT_POLICY_H_
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#define FESA_CONSTRAINTS_ESSENTIAL_CONSTRAINT_POLICY_H_
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#include "fesa/core/status.h"
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#include "fesa/math/sparse_matrix.h"
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#include "fesa/math/vector.h"
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namespace fesa {
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class DofManager;
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/// @brief Stores full-stiffness blocks in stable free/constrained order.
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struct PartitionedStiffness {
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SparseMatrix k_ff;
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SparseMatrix k_fc;
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SparseMatrix k_cf;
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SparseMatrix k_cc;
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};
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/// @brief Applies stable prescribed-displacement elimination.
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class EssentialConstraintPolicy {
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public:
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/// @brief Partitions full stiffness into Kff, Kfc, Kcf, and Kcc.
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Result<PartitionedStiffness> Partition(const SparseMatrix& full_stiffness,
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const DofManager& dof_manager) const;
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/// @brief Forms Ff-Kfc*dc in stable free/constrained order.
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/// @return A finite RHS candidate or the established load diagnostic.
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/// @note Preserves independent CSR products and ordered row reductions;
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/// no factorization or solver operation is performed. Inputs are borrowed
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/// only for this call and remain unchanged on failure.
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Result<Vector> EffectiveFreeRhs(const Vector& full_load,
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const SparseMatrix& kfc,
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const Vector& prescribed_values,
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const DofManager& dofs) const;
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/// @brief Gathers a full vector in stable free-equation order.
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Vector GatherFree(const Vector& full_values,
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const DofManager& dof_manager) const;
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/// @brief Gathers a full vector in stable constrained-DOF order.
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Vector GatherConstrained(const Vector& full_values,
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const DofManager& dof_manager) const;
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/// @brief Reconstructs full d from stable df and exact prescribed dc.
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Vector ReconstructFull(const Vector& free_values,
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const Vector& constrained_values,
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const DofManager& dof_manager) const;
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};
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} // namespace fesa
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#endif // FESA_CONSTRAINTS_ESSENTIAL_CONSTRAINT_POLICY_H_
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