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added test for zero eigenvalue model (no dirichlet boundaries defined)

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Jukka Aho
2016-12-12 07:40:18 +02:00
parent 1d3962a944
commit 306edbcacd
2 changed files with 35 additions and 6 deletions
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test/test_modal_analysis_zero_eigenmodes.jl
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# This file is a part of JuliaFEM.
# License is MIT: see https://github.com/JuliaFEM/JuliaFEM.jl/blob/master/LICENSE.md
using JuliaFEM
using JuliaFEM.Preprocess
using JuliaFEM.Postprocess
using JuliaFEM.Testing
@testset "zero eigenmode model" begin
meshfile = Pkg.dir("JuliaFEM") * "/test/testdata/primitives.med"
mesh = aster_read_mesh(meshfile, "TETRA_TET10_1")
model = Problem(mesh, Elasticity, "TET", 3)
update!(model.elements, "youngs modulus", 10.0)
update!(model.elements, "poissons ratio", 1.0/3.0)
update!(model.elements, "density", 10.0)
solver = Solver(Modal)
solver.properties.nev = 30
push!(solver, model)
solver()
freqs = solver.properties.eigvals
info("freqs: $freqs")
freqs_expected = [0.0,0.0,0.0,0.0,0.0,0.0,5.05743,5.05743,7.30374,9.55885,9.55885,18.3471,18.3471,19.124,37.008,37.008,47.25,59.8844,63.0,65.3975,65.3975,88.1879,108.854,108.854,131.702,131.702,221.374,301.326,301.326]
@test isapprox(freqs, freqs_expected; atol=1.0e-3)
end