KOKO\Mimi
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
#ifndef FESA_CONSTRAINTS_ESSENTIAL_CONSTRAINTS_H_
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#define FESA_CONSTRAINTS_ESSENTIAL_CONSTRAINTS_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 kff;
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SparseMatrix kfc;
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SparseMatrix kcf;
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SparseMatrix kcc;
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};
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/// @brief Applies stable prescribed-displacement elimination.
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class EssentialConstraints {
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public:
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/// @brief Partitions full stiffness into Kff, Kfc, Kcf, and Kcc.
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static Result<PartitionedStiffness> Partition(const SparseMatrix& full,
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const DofManager& dofs);
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/// @brief Gathers a full vector in stable free-equation order.
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static Vector GatherFree(const Vector& full, const DofManager& dofs);
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/// @brief Gathers a full vector in stable constrained-DOF order.
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static Vector GatherConstrained(const Vector& full, const DofManager& dofs);
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/// @brief Reconstructs full d from stable df and exact prescribed dc.
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static Vector ReconstructFull(const Vector& free_values,
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const Vector& constrained_values,
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const DofManager& dofs);
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};
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} // namespace fesa
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#endif // FESA_CONSTRAINTS_ESSENTIAL_CONSTRAINTS_H_
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