chrono::modal::ChSymGenEigenvalueSolver Class Referenceabstract
Description
Base interface class for iterative eigenvalue solvers for generalized problem with real symmetric matrices.
The interfaces assumes shift-and-invert methods.
#include <ChSymGenEigenvalueSolver.h>
Inheritance diagram for chrono::modal::ChSymGenEigenvalueSolver:
Collaboration diagram for chrono::modal::ChSymGenEigenvalueSolver:
Public Member Functions | |
| virtual int | Solve (const ChSparseMatrix &A, const ChSparseMatrix &B, ChMatrixDynamic< ScalarType > &eigvects, ChVectorDynamic< ScalarType > &eigvals, int num_modes, ScalarType shift) const =0 |
| Solve the generalized eigenvalue problem A*eigvects = B*eigvects*diag(eigvals) A and B are expected to be symmetric and real 'eigvects' will be resized to [A.rows() x num_modes] 'eigvals' will be resized to [num_modes] the number of converged eigenvalues is returned. | |
 Public Member Functions inherited from chrono::modal::ChGeneralizedEigenvalueSolver< double > | |
| double | GetTimeMatrixAssembly () const |
| Get cumulative time for matrix assembly. | |
| double | GetTimeEigenSetup () const |
| Get cumulative time for the eigensolver setup. | |
| double | GetTimeEigenSolver () const |
| Get cumulative time for the eigensolver solution. | |
| double | GetTimeSolutionPostProcessing () const |
| Get cumulative time for post-solver solution postprocessing. | |
Static Public Member Functions | |
| static void | GetNaturalFrequencies (const ChVectorDynamic< ScalarType > &eigvals, ChVectorDynamic< double > &freq) |
| Retrieve the natural frequencies from an eigenvalues array. | |
| static double | GetNaturalFrequency (ScalarType eigval) |
| Retrieve the natural frequencies from an eigenvalue. | |
| static ScalarType | GetOptimalShift (double freq) |
| Get the optimal shift corresponding to a given frequency. | |
| Static Public Member Functions inherited from chrono::modal::ChGeneralizedEigenvalueSolver< double > | |
| static void | SortRitzPairs (ChVectorDynamic< ScalarType > &eigvals, ChMatrixDynamic< ScalarType > &eigvects, std::function< bool(const ChVectorDynamic< ScalarType > &, int, int)> ordering_fun=[](const ChVectorDynamic< std::complex< double >> &eigv, int a, int b) { return std::abs(eigv(a))< std::abs(eigv(b));}) |
| Sort the eigenvalues and eigenvectors in the order specified by the ordering function in-place. | |
| static double | GetMaxResidual (const ChSparseMatrix &A, const ChSparseMatrix &B, const ChMatrixDynamic< ScalarType > &eigvects, const ChVectorDynamic< ScalarType > &eigvals) |
| static double | GetMaxResidual (const ChSparseMatrix &K, const ChSparseMatrix &M, const ChSparseMatrix &Cq, const ChMatrixDynamic< ScalarType > &eigvects, const ChVectorDynamic< ScalarType > &eigvals) |
| static double | GetMaxResidual (const ChSparseMatrix &K, const ChSparseMatrix &R, const ChSparseMatrix &M, const ChSparseMatrix &Cq, const ChMatrixDynamic< ScalarType > &eigvects, const ChVectorDynamic< ScalarType > &eigvals) |
| static double | BuildUndampedSystem (const ChSparseMatrix &M, const ChSparseMatrix &K, const ChSparseMatrix &Cq, ChSparseMatrix &A, ChSparseMatrix &B, bool scaleCq) |
| Build the quadratic eigenvalue problem matrix for the undamped case. More... | |
| static double | BuildDampedSystem (const ChSparseMatrix &M, const ChSparseMatrix &R, const ChSparseMatrix &K, const ChSparseMatrix &Cq, ChSparseMatrix &A, ChSparseMatrix &B, bool scaleCq) |
| Build the quadratic eigenvalue problem matrix for the damped case. More... | |
| static void | InsertUniqueRitzPairs (const ChVectorDynamic< ScalarType > &eigvals_source, const ChMatrixDynamic< ScalarType > &eigvects_source, ChVectorDynamic< ScalarType > &eigvals_total, ChMatrixDynamic< ScalarType > &eigvects_total, std::function< double(ScalarType)> freq_from_eigval_fun, int &found_eigs, int num_eigvals_source, double equal_freq_tolerance=1e-4) |
| Add unique ritz pairs to a wider set of ritz pairs. More... | |
Additional Inherited Members | |
| Public Types inherited from chrono::modal::ChGeneralizedEigenvalueSolver< double > | |
| using | ScalarType = double |
| Public Attributes inherited from chrono::modal::ChGeneralizedEigenvalueSolver< double > | |
| double | tolerance |
| tolerance for the iterative solver. | |
| int | max_iterations |
| upper limit for the number of iterations. If too low might not converge. | |
| bool | verbose |
| turn to true to see some diagnostic. | |
| bool | sort_ritz_pairs |
| sort the eigenvalues based on the smallest absolute value | |
| Static Protected Member Functions inherited from chrono::modal::ChGeneralizedEigenvalueSolver< double > | |
| static Eigen::PermutationMatrix< Eigen::Dynamic, Eigen::Dynamic > | GetPermutationMatrix (int num_elements, std::function< bool(int, int)> ordering_fun) |
| Returns the permutation matrix to sort the given elements based on the ordering function. | |
| Protected Attributes inherited from chrono::modal::ChGeneralizedEigenvalueSolver< double > | |
| ChTimer | m_timer_matrix_assembly |
| timer for matrix assembly | |
| ChTimer | m_timer_eigen_setup |
| timer for eigensolver setup | |
| ChTimer | m_timer_eigen_solver |
| timer for eigensolver solution | |
| ChTimer | m_timer_solution_postprocessing |
| timer for conversion of eigensolver solution | |
| const int | m_min_subspace_size |
The documentation for this class was generated from the following files:
- /builds/uwsbel/chrono/src/chrono_modal/ChSymGenEigenvalueSolver.h
- /builds/uwsbel/chrono/src/chrono_modal/ChSymGenEigenvalueSolver.cpp
