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[IGA] New IGA Example: Single-Patch Shell with Line Load and Weak Support (Penalty Method) #151

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Merged
juancamarotti merged 1 commit into from
Dec 24, 2025
Merged

[IGA] New IGA Example: Single-Patch Shell with Line Load and Weak Support (Penalty Method) #151

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124 changes: 124 additions & 0 deletions iga/use_cases/iga_shell_3p_single_patch/ProjectParameters.json
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{
"problem_data": {
"problem_name": "embedded_plate",
"echo_level": 4,
"parallel_type": "OpenMP",
"start_time": 0.0,
"end_time": 1.0
},
"solver_settings" : {
"solver_type" : "static",
"analysis_type" : "linear",
"model_part_name" : "IgaModelPart",
"domain_size" : 3,
"echo_level": 2,
"model_import_settings" : {
"input_type" : "use_input_model_part"
},
"material_import_settings" : {
"materials_filename" : "materials.json"
},
"time_stepping" : {
"time_step" : 1.5
},
"rotation_dofs": false,
"reform_dofs_at_each_step": false,
"line_search": false,
"compute_reactions": true,
"block_builder": true,
"clear_storage": false,
"move_mesh_flag": true,
"convergence_criterion": "residual_criterion",
"displacement_relative_tolerance": 1e-8,
"displacement_absolute_tolerance": 1e-10,
"residual_relative_tolerance": 1e-8,
"residual_absolute_tolerance": 1e-10,
"max_iteration": 100,
"linear_solver_settings": {},
"auxiliary_variables_list": [],
"auxiliary_dofs_list": [],
"auxiliary_reaction_list": []
},
"modelers": [
{
"modeler_name": "CadIoModeler",
"Parameters": {
"echo_level": 0,
"cad_model_part_name": "IgaModelPart",
"geometry_file_name": "geometry.cad.json",
"output_geometry_file_name": "rectangular_plate_vibroacoustics_kratos_0.georhino.json"
}
},
{
"modeler_name": "IgaModeler",
"Parameters": {
"echo_level": 1,
"cad_model_part_name": "IgaModelPart",
"analysis_model_part_name": "IgaModelPart",
"physics_file_name": "physics.iga.json"
}
},
{
"modeler_name": "RefinementModeler",
"Parameters": {
"echo_level": 0,
"physics_file_name": "refinements.iga.json"
}
}
],
"processes": {
"additional_processes": [{
"kratos_module": "IgaApplication",
"python_module": "output_quadrature_domain_process",
"Parameters": {
"output_file_name": "rectangular_plate_vibroacoustics_kratos_shell_1_integrationdomain.json",
"model_part_name": "IgaModelPart.StructuralAnalysis_1",
"output_geometry_elements": true,
"output_geometry_conditions": false
}
}],
"dirichlet_process_list": [
{
"kratos_module": "KratosMultiphysics",
"python_module": "assign_vector_variable_to_conditions_process",
"Parameters": {
"model_part_name": "IgaModelPart.Support_1",
"variable_name": "DISPLACEMENT",
"value": [ 0, 0, 0 ],
"interval": [ 0, "End" ]
}
}
],
"neumann_process_list": [
{
"kratos_module": "KratosMultiphysics",
"python_module": "assign_vector_variable_to_conditions_process",
"Parameters": {
"model_part_name": "IgaModelPart.Load_1",
"variable_name": "DEAD_LOAD",
"value": [ 1.0, 0, 0.0 ],
"interval": [ 0, "End" ]
}
}
],
"constraints_process_list" : [],
"list_other_processes" : []
},
"output_processes": {
"output_process_list": [
{
"kratos_module": "IgaApplication",
"python_module": "iga_output_process",
"Parameters": {
"nodal_results": [ "DISPLACEMENT", "POINT_LOAD", "REACTION"],
"integration_point_results": [],
"output_file_name": "rectangular_plate_vibroacoustics_kratos_shell_1.post.res",
"model_part_name": "IgaModelPart.StructuralAnalysis_1",
"file_label": "step",
"output_control_type": "time",
"output_frequency": 1.0
}
}
]
}
}
235 changes: 235 additions & 0 deletions iga/use_cases/iga_shell_3p_single_patch/geometry.cad.json
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{
"tolerances": { "model_tolerance": 0.001 },
"version_number": 1,
"breps": [
{
"brep_id": 1,
"faces": [
{
"brep_id": 2,
"swapped_surface_normal": false,
"surface": {
"is_trimmed": true,
"is_rational": false,
"degrees": [ 1, 1 ],
"knot_vectors": [
[ 0, 0, 1, 1 ],
[ 0, 0, 0.5, 0.5 ]
],
"control_points": [
[
1,
[ 0, 0, 0, 1 ]
],
[
2,
[ 1, 0, 0, 1 ]
],
[
3,
[ 0, 0.5, 0, 1 ]
],
[
4,
[ 1, 0.5, 0, 1 ]
]
]
},
"boundary_loops": [
{
"loop_type": "outer",
"trimming_curves": [
{
"trim_index": 0,
"curve_direction": true,
"parameter_curve": {
"is_rational": false,
"degree": 1,
"knot_vector": [ 0, 0, 1, 1 ],
"active_range": [ 0, 1 ],
"control_points": [
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[ 0, 0, 0, 1 ]
],
[
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[ 1, 0, 0, 1 ]
]
]
}
},
{
"trim_index": 1,
"curve_direction": true,
"parameter_curve": {
"is_rational": false,
"degree": 1,
"knot_vector": [ 0, 0, 0.5, 0.5 ],
"active_range": [ 0, 0.5 ],
"control_points": [
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"trim_index": 2,
"curve_direction": true,
"parameter_curve": {
"is_rational": false,
"degree": 1,
"knot_vector": [ 0, 0, 1, 1 ],
"active_range": [ 0, 1 ],
"control_points": [
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[ 1, 0.5, 0, 1 ]
],
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[ 0, 0.5, 0, 1 ]
]
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}
},
{
"trim_index": 3,
"curve_direction": true,
"parameter_curve": {
"is_rational": false,
"degree": 1,
"knot_vector": [ 0, 0, 0.5, 0.5 ],
"active_range": [ 0, 0.5 ],
"control_points": [
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[ 0, 0.5, 0, 1 ]
],
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[ 0, 0, 0, 1 ]
]
]
}
}
]
}
],
"embedded_loops": [],
"embedded_edges": [],
"embedded_points": []
}
],
"edges": [
{
"brep_id": 3,
"3d_curve": {
"degree": 1,
"knot_vector": [ 0, 0, 1, 1 ],
"active_range": [ 0, 1 ],
"control_points": [
[
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[ 0, 0, 0, 1 ]
],
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[ 1, 0, 0, 1 ]
]
]
},
"topology": [
{
"brep_id": 2,
"trim_index": 0,
"relative_direction": true
}
]
},
{
"brep_id": 4,
"3d_curve": {
"degree": 1,
"knot_vector": [ 0, 0, 0.5, 0.5 ],
"active_range": [ 0, 0.5 ],
"control_points": [
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[ 1, 0, 0, 1 ]
],
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]
]
},
"topology": [
{
"brep_id": 2,
"trim_index": 1,
"relative_direction": true
}
]
},
{
"brep_id": 5,
"3d_curve": {
"degree": 1,
"knot_vector": [ -1, -1, 0, 0 ],
"active_range": [ -1, 0 ],
"control_points": [
[
17,
[ 1, 0.5, 0, 1 ]
],
[
18,
[ 0, 0.5, 0, 1 ]
]
]
},
"topology": [
{
"brep_id": 2,
"trim_index": 2,
"relative_direction": true
}
]
},
{
"brep_id": 6,
"3d_curve": {
"degree": 1,
"knot_vector": [ -0.5, -0.5, 0, 0 ],
"active_range": [ -0.5, 0 ],
"control_points": [
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],
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]
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},
"topology": [
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"trim_index": 3,
"relative_direction": true
}
]
}
],
"vertices": []
}
]
}
11 changes: 11 additions & 0 deletions iga/use_cases/iga_shell_3p_single_patch/kratos_main_iga.py
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import KratosMultiphysics
import KratosMultiphysics.IgaApplication
from KratosMultiphysics.StructuralMechanicsApplication.structural_mechanics_analysis import StructuralMechanicsAnalysis

if __name__ == "__main__":
with open("ProjectParameters.json",'r') as parameter_file:
parameters = KratosMultiphysics.Parameters(parameter_file.read())

model = KratosMultiphysics.Model()
simulation = StructuralMechanicsAnalysis(model, parameters)
simulation.Run()
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