Description

Base interface class for eigensolvers for the undamped constrained generalized problem (-wsquare*M + K)*x = 0 s.t.

Cq*x = 0 Children classes can implement this in different ways, overridding Solve()

#include <ChEigenvalueSolver.h>

Inheritance diagram for chrono::modal::ChGeneralizedEigenvalueSolver:

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Collaboration diagram for chrono::modal::ChGeneralizedEigenvalueSolver:

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Public Member Functions
virtual bool	Solve (const ChSparseMatrix &M, const ChSparseMatrix &K, const ChSparseMatrix &Cq, ChMatrixDynamic< std::complex< double >> &eigvects, ChVectorDynamic< std::complex< double >> &eigvals, ChVectorDynamic< double > &freq, ChEigenvalueSolverSettings settings=0) const =0
	Solve the constrained eigenvalue problem (-wsquareM + K)x = 0 s.t. More...

virtual bool	Solve (ChAssembly &assembly, ChMatrixDynamic< std::complex< double >> &eigvects, ChVectorDynamic< std::complex< double >> &eigvals, ChVectorDynamic< double > &freq, ChEigenvalueSolverSettings settings=0) const =0
	Solve the constrained eigenvalue problem (-wsquareM + K)x = 0 s.t. More...

double	GetTimeMatrixAssembly () const
	Get cumulative time for matrix assembly.

double	GetTimeEigenSetup () const
	Get cumulative time eigensolver setup.

double	GetTimeEigenSolver () const
	Get cumulative time eigensolver solution.

double	GetTimeSolutionPostProcessing () const
	Get cumulative time for post-solver solution postprocessing.

Protected Attributes
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

Member Function Documentation

virtual bool chrono::modal::ChGeneralizedEigenvalueSolver::Solve	(	ChAssembly &	assembly,
		ChMatrixDynamic< std::complex< double >> &	eigvects,
		ChVectorDynamic< std::complex< double >> &	eigvals,
		ChVectorDynamic< double > &	freq,
		ChEigenvalueSolverSettings	settings = `0`
	)		const

pure virtual

Solve the constrained eigenvalue problem (-wsquare*M + K)*x = 0 s.t.

Cq*x = 0 If n_modes=0, return all eigenvalues, otherwise only the first lower n_modes.

Parameters

assembly	assembly on which to apply the eigen solver
eigvects	output matrix n x n_v with eigenvectors as columns, will be resized
eigvals	output vector with n eigenvalues, will be resized.
freq	output vector with n frequencies [Hz], as f=w/(2*PI), will be resized.
settings	optional: settings for the solver, or n. of desired lower eigenvalues. If =0, return all eigenvalues.

virtual bool chrono::modal::ChGeneralizedEigenvalueSolver::Solve	(	const ChSparseMatrix &	M,
		const ChSparseMatrix &	K,
		const ChSparseMatrix &	Cq,
		ChMatrixDynamic< std::complex< double >> &	eigvects,
		ChVectorDynamic< std::complex< double >> &	eigvals,
		ChVectorDynamic< double > &	freq,
		ChEigenvalueSolverSettings	settings = `0`
	)		const

pure virtual

Solve the constrained eigenvalue problem (-wsquare*M + K)*x = 0 s.t.

Cq*x = 0 If n_modes=0, return all eigenvalues, otherwise only the first lower n_modes.

Parameters

M	input M matrix, n_v x n_v
K	input K matrix, n_v x n_v
Cq	input Cq matrix of constraint jacobians, n_c x n_v
eigvects	output matrix n x n_v with eigenvectors as columns, will be resized
eigvals	output vector with n eigenvalues, will be resized.
freq	output vector with n frequencies [Hz], as f=w/(2*PI), will be resized.
settings	optional: settings for the solver, or n. of desired lower eigenvalues. If =0, return all eigenvalues.

The documentation for this class was generated from the following file: