FEATool Multiphysics
v1.17.0
Finite Element Analysis Toolbox
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SOLVEEIG Solve eigenvalue problem.
[ U, L ] = SOLVEEIG( PROB, VARARGIN ) Solves the eigenvalue problem described in the PROB finite element struct with homogenous boundary conditions, and returns the eigenvectors U and eigenvalues L. Accepts the following property/value pairs.
Input Value/{Default} Description ----------------------------------------------------------------------------------- neigs scalar/{6} Number of eigenvalues sigma scalar/string/{sm} Range or type of eigenvalues see the eigs function for options imass scalar/{4} Mass matrix lumping 1 - Full mass matrix 2 - row sum lumping 3 - diagonal lumping 4 - HRZ diagonal lumping init u0|{expr}/{0} Initial value solution or expression for linearization point solcomp {all dvars} Dep. variables/subdomains to solve for icub scalar/{auto} Cubature rule/order used in assembly Default 1+max(shape function order) isymm scalar/{0} Symmetrize BCs if applicable waitbar scalar/{0} Show waitbar fid scalar/{1} File identifier for output ([]=no output)