mirror of
https://github.com/JuliaFEM/JuliaFEM.jl.git
synced 2026-09-07 11:46:23 +00:00
Jukka Aho
57 lines
1.7 KiB
Julia
57 lines
1.7 KiB
Julia
# This file is a part of JuliaFEM.
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# License is MIT: see https://github.com/JuliaFEM/JuliaFEM.jl/blob/master/LICENSE.md
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module TestDirichletBoundaryCondition
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using JuliaFEM.Test
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using JuliaFEM.Core: Seg2, DirichletProblem, Assembly, assemble
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function test_dirichlet_problem_1_dim()
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element = Seg2([1, 2])
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element["geometry"] = Vector[[1.0, 1.0], [0.0, 1.0]]
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element["temperature"] = 0.0
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problem = DirichletProblem("temperature", 1)
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push!(problem, element)
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assembly = assemble(problem, 0.0)
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A = full(assembly.stiffness_matrix)
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b = full(assembly.force_vector)
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@test isapprox(A, 1/6*[2 1; 1 2])
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@test isapprox(b, [0.0, 0.0])
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end
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function test_dirichlet_problem_2_dim()
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element = Seg2([1, 2])
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element["geometry"] = Vector[[1.0, 1.0], [0.0, 1.0]]
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element["displacement"] = 0.0
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problem = DirichletProblem("displacement", 2)
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push!(problem, element)
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assembly = assemble(problem, 0.0)
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A = full(assembly.stiffness_matrix)
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b = full(assembly.force_vector)
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A_expected = 1/6*[2 0 1 0; 0 2 0 1; 1 0 2 0; 0 1 0 2]
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@test isapprox(A, A_expected)
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@test isapprox(b, [0.0, 0.0, 0.0, 0.0])
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end
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function test_dirichlet_problem_2_dim_single_dof_fixed()
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element = Seg2([1, 2])
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element["geometry"] = Vector[[1.0, 1.0], [0.0, 1.0]]
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element["displacement 2"] = 0.0
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problem = DirichletProblem("displacement", 2)
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push!(problem, element)
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assembly = assemble(problem, 0.0)
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A = full(assembly.stiffness_matrix)
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b = full(assembly.force_vector)
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info(b)
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info("A = \n$A")
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A_expected = 1/6*[
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0 0 0 0
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0 2 0 1
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0 0 0 0
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0 1 0 2]
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@test isapprox(A, A_expected)
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@test isapprox(b, [0.0, 0.0, 0.0, 0.0])
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end
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end
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