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model_io_ibarras.cc
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Thu, Nov 7, 05:09
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rAKA akantu
model_io_ibarras.cc
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/**
* @file model_io_ibarras.cc
*
* @author Fabian Barras <fabian.barras@epfl.ch>
*
* @date creation: Wed Jan 16 2013
* @date last modification: Thu Jun 05 2014
*
* @brief Mesh Reader specially created for Wood's Tower analysis performed by the Institute I-Barras
*
* @section LICENSE
*
* Copyright (©) 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
#include <fstream>
#include <iostream>
/* -------------------------------------------------------------------------- */
#include "model_io_ibarras.hh"
#include "static_communicator.hh"
#include "aka_math.hh"
#include "static_communicator.hh"
#include "sparse_matrix.hh"
#include "solver.hh"
#include "integration_scheme_2nd_order.hh"
/* -------------------------------------------------------------------------- */
#include <string.h>
/* -------------------------------------------------------------------------- */
#include <stdio.h>
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
/* Methods Implentations */
/* -------------------------------------------------------------------------- */
void ModelIOIBarras::read(const std::string & filename, Model & mod) {
if (! dynamic_cast<StructuralMechanicsModel*>(&mod)){
AKANTU_DEBUG_ERROR("");
}
StructuralMechanicsModel & model = static_cast<StructuralMechanicsModel&>(mod);
Mesh * mesh = new Mesh(3);
std::ifstream infile;
infile.open(filename.c_str());
std::string line;
UInt current_line = 0;
if(!infile.good()) {
AKANTU_DEBUG_ERROR("Cannot open file " << filename);
}
// Get Nodes Position
std::getline(infile, line);
current_line++;
std::stringstream sstr(line);
UInt nb_nodes;
sstr >> nb_nodes;
UInt spatial_dimension = 3;
Real coord[spatial_dimension];
Real * temp_nodes = new Real[nb_nodes*spatial_dimension];
UInt * connect_to_akantu = new UInt[nb_nodes];
std::fill_n(connect_to_akantu ,0, nb_nodes);
std::fill_n(temp_nodes ,0., nb_nodes * spatial_dimension);
for (UInt i = 0; i < nb_nodes; ++i) {
UInt offset = i * spatial_dimension;
std::getline(infile, line);
std::stringstream sstr_node(line);
sstr_node >> coord[0] >> coord[1] >> coord[2];
current_line++;
/// read the coordinates of structural nodes and help nodes
for(UInt j = 0; j < spatial_dimension; ++j)
temp_nodes[offset + j] = coord[j];
}
// Get Connectivities
std::getline(infile, line);
current_line++;
std::stringstream sstr_elem(line);
UInt nb_elements;
sstr_elem >> nb_elements;
mesh->addConnectivityType(_bernoulli_beam_3);
Array<UInt> & connectivity = const_cast<Array<UInt> &>(mesh->getConnectivity(_bernoulli_beam_3));
connectivity.resize(nb_elements);
UInt nonodes[2];
UInt nb_struct_nodes=1;
for (UInt i = 0; i < nb_elements; ++i){
std::getline(infile, line);
std::stringstream sstr_element(line);
sstr_element >> nonodes[0] >> nonodes[1];
current_line++;
/// read the connectivities
for(UInt j = 0; j < 2; ++j){
if (connect_to_akantu[nonodes[j]-1]==0){
connect_to_akantu[nonodes[j]-1]=nb_struct_nodes;
++nb_struct_nodes;
}
connectivity(i,j)=connect_to_akantu[nonodes[j]-1]-1;
}
}
nb_struct_nodes-=1;
/// read the coordinates of structural nodes
Array<Real> & nodes = const_cast<Array<Real> &>(mesh->getNodes());
nodes.resize(nb_struct_nodes);
for(UInt k = 0; k < nb_nodes; ++k){
if (connect_to_akantu[k]!=0){
for(UInt j = 0; j < spatial_dimension; ++j)
nodes(connect_to_akantu[k]-1,j) = temp_nodes[k*spatial_dimension+j];
}
}
//MeshPartitionScotch partition(*mesh, spatial_dimension);
//partition.reorder();
///Apply Boundaries
model.registerFEEngineObject<StructuralMechanicsModel::MyFEEngineType>("StructuralMechanicsModel", *mesh, spatial_dimension);
model.initModel();
model.initArrays();
Array<bool> & blocked_dofs = model.getBlockedDOFs();
std::getline(infile, line);
std::stringstream sstr_nb_boundaries(line);
UInt nb_boundaries;
sstr_nb_boundaries >> nb_boundaries;
current_line++;
for (UInt i = 0; i < nb_boundaries; ++i){
std::getline(infile, line);
std::stringstream sstr_boundary(line);
UInt boundnary_node;
sstr_boundary >> boundnary_node;
current_line++;
for (UInt j = 0; j < spatial_dimension; ++j)
blocked_dofs(connect_to_akantu[boundnary_node-1]-1 ,j)=true;
}
///Define Materials
std::getline(infile, line);
std::stringstream sstr_nb_materials(line);
UInt nb_materials;
sstr_nb_materials >> nb_materials;
current_line++;
for (UInt i = 0; i < nb_materials; ++i){
std::getline(infile, line);
std::stringstream sstr_material(line);
Real material[6];
sstr_material >> material[0] >> material[1] >> material[2] >> material[3] >> material[4] >> material[5];
current_line++;
StructuralMaterial mat;
mat.E = material[0];
mat.GJ = material[1] * material[2];
mat.Iy = material[3];
mat.Iz = material[4];
mat.A = material[5];
model.addMaterial(mat);
}
/// Apply normals and Material TO IMPLEMENT
UInt property[2];
Array<UInt> & element_material = model.getElementMaterial(_bernoulli_beam_3);
mesh->initNormals();
Array<Real> & normals = const_cast<Array<Real> &>(mesh->getNormals(_bernoulli_beam_3));
normals.resize(nb_elements);
for (UInt i = 0; i < nb_elements; ++i){
std::getline(infile, line);
std::stringstream sstr_properties(line);
sstr_properties >> property[0] >> property[1];
current_line++;
/// Assign material
element_material(i)=property[0]-1;
/// Compute normals
Real x[3];
Real v[3];
Real w[3];
Real n[3];
if (property[1]==0){
for (UInt j = 0; j < spatial_dimension; ++j){
x[j] = nodes(connectivity(i,1),j) - nodes(connectivity(i,0),j);
}
n[0] = x[1];
n[1] = -x[0];
n[2] = 0.;
}
else{
for (UInt j = 0; j < spatial_dimension; ++j){
x[j] = nodes(connectivity(i,1),j) - nodes(connectivity(i,0),j);
v[j] = nodes(connectivity(i,1),j) - temp_nodes[(property[1]-1) * spatial_dimension + j];
Math::vectorProduct3(x, v, w);
Math::vectorProduct3(x, w, n);
}
}
Math::normalize3(n);
for (UInt j = 0; j < spatial_dimension; ++j){
normals(i,j) = n[j];
}
}
model.computeRotationMatrix(_bernoulli_beam_3);
infile.close();
}
/* -------------------------------------------------------------------------- */
void ModelIOIBarras::assign_sets(const std::string & filename, StructuralMechanicsModel & model){
std::ifstream infile;
infile.open(filename.c_str());
std::string line;
UInt current_line = 0;
if(!infile.good()) {
AKANTU_DEBUG_ERROR("Cannot open file " << filename);
}
// Define Sets of Beams
Array<UInt> & set_ID = model.getSet_ID(_bernoulli_beam_3);
set_ID.clear();
std::getline(infile, line);
std::stringstream sstr_nb_sets(line);
UInt nb_sets;
sstr_nb_sets >> nb_sets;
current_line++;
UInt no_element[2];
for (UInt i = 0; i < nb_sets; ++i){
std::getline(infile, line);
std::stringstream sstr_set(line);
sstr_set >> no_element[0];
no_element[1]=no_element[0];
sstr_set >> no_element[1];
while (no_element[0]!=0) {
for (UInt j = no_element[0]-1 ; j < no_element[1] ; ++j){
set_ID(j) = i+1;
}
std::getline(infile, line);
std::stringstream sstr_sets(line);
sstr_sets >> no_element[0];
no_element[1]=no_element[0];
sstr_sets >> no_element[1];
}
}
}
__END_AKANTU__
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