static void Main()
{
// PRACTICAL EXAMPLE: PARAMETRIC STUDY - SENSITIVITY ANALYSIS
// In this example, we will analyse how different stiffness values on a support
// will affect a bridge (modelled simply as a beam).
// This example was last updated 2022-05-03, using the ver. 21.1.0 FEM-Design API.
// FILE PATH SETUP
// Set the different paths and folders relevant to the example
string struxmlPath = "Bridge Model.struxml";
string bscPath = Path.GetFullPath("eigenfreq.bsc");
List <string> bscPaths = new List <string>();
bscPaths.Add(bscPath);
// READ MODEL AND GET SUPPORTS
Model model = Model.DeserializeFromFilePath(struxmlPath);
//Read point support number and its stiffness properties
var support1 = model.Entities.Supports.PointSupport.FirstOrDefault(p => p.Name == "S.1");
var support2 = model.Entities.Supports.PointSupport.FirstOrDefault(p => p.Name == "S.2");
double alpha = 0.5;
// ITERATION AND ANALYSIS PROCESS
// Iterate over model using different stiffness value for the the rotational spring cy
int N = 20;
for (int i = 1; i <= N; i++)
{
// Change stiffness of support cy
support1.Rotations.YPos = Math.Pow(10, alpha);
support1.Rotations.YNeg = Math.Pow(10, alpha);
support2.Rotations.YPos = Math.Pow(10, alpha);
support2.Rotations.YNeg = Math.Pow(10, alpha);
var supports = new List <Supports.PointSupport>()
{
support1, support2
};
model.AddElements(supports);
// Save struxml
string outPathIndividual = Path.GetFullPath("Bridge Model_out" + Convert.ToString(alpha, System.Globalization.CultureInfo.InvariantCulture) + ".struxml");
model.SerializeModel(outPathIndividual);
// Run analysis
var freq = new Calculate.Freq(5, 0, false, false, true, -0.01);
Calculate.Analysis analysis = new Calculate.Analysis(null, null, freq, null, true, false, false, false, false, false, true, false, false, false, false, false, false);
FemDesign.Calculate.FdScript fdScript = FemDesign.Calculate.FdScript.Analysis(outPathIndividual, analysis, bscPaths, "", true);
Calculate.Application app = new Calculate.Application();
app.RunFdScript(fdScript, false, true, true);
// Read results from csv file (general method)
{
Console.WriteLine("");
Console.WriteLine(string.Format("Alpha: {0}", alpha));
string text = System.IO.File.ReadAllText(fdScript.CmdListGen[0].OutFile);
Console.WriteLine(text);
}
alpha = alpha + 0.5;
}
// ENDING THE PROGRAM
Console.WriteLine("\nPress any key to close console.");
Console.ReadKey();
}
static void Main()
{
// EXAMPLE 2: ANALYSING A MODEL
// This example will show you how to run an analyse
// with a given model from within a C# script.
// This example was last updated 2022-05-03, using the ver. 21.1.0 FEM-Design API.
// LOADING UP THE MODEL
string struxmlPath = "exbeam.struxml";
Model model = Model.DeserializeFromFilePath(struxmlPath);
// SETUP BY LOAD CALCULATION SETTINGS
// These settings are found in the FEM-Design calculation window.
bool NLE = true;
bool PL = true;
bool NLS = false;
bool Cr = false;
bool _2nd = false;
// SETTING UP LOAD COMBINATIONS
// In this example, we use the same settings (CombItem)
// for all load combinations, applied with a simple loop.
var combItem = new FemDesign.Calculate.CombItem(0, 0, NLE, PL, NLS, Cr, _2nd);
int numLoadCombs = model.Entities.Loads.LoadCombinations.Count;
var combItems = new List <Calculate.CombItem>();
for (int i = 0; i < numLoadCombs; i++)
{
combItems.Add(combItem);
}
Calculate.Comb comb = new Calculate.Comb();
comb.CombItem = combItems.ToList();
// CHOOSING THE ANALYSIS SETTINGS
// These dictate which calculations to run.
FemDesign.Calculate.Analysis analysis = new FemDesign.Calculate.Analysis(
stage: null,
comb: comb,
freq: null,
footfall: null,
calcCase: true,
calcCStage: false,
calcImpf: false,
calcComb: true,
calcGMax: false,
calcStab: false,
calcFreq: false,
calcSeis: false,
calcDesign: false,
calcFootfall: false,
elemFine: false,
diaphragm: false,
peakSmoothing: false
);
// RUN THE ANALYSIS VIA AN FDSCRIPT
var bscPath = new List <string> {
@"C:\GitHub\femdesign-api\FemDesign.Examples\C#\Example 2 - Analysing a model\bin\Debug\pointsupportreactions.bsc"
};
FemDesign.Calculate.FdScript fdScript = FemDesign.Calculate.FdScript.Analysis(Path.GetFullPath(struxmlPath), analysis, bscPath, "", true);
Calculate.Application app = new Calculate.Application();
app.RunFdScript(fdScript, false, true, true);
}
static void Main()
{
// PRACTICAL EXAMPLE: PARAMETRIC STUDY - REACTIONS
// In this example, we will analyse how different E-modules will result
// in different reaction forces in the supports holding a concrete plate.
// This example was last updated 2022-05-03, using the ver. 21.1.0 FEM-Design API.
// FILE PATH SETUP
// Set the different paths and folders relevant to the example
string struxmlPath = "sample_slab.struxml";
string outFolder = "output/";
if (!Directory.Exists(outFolder))
{
Directory.CreateDirectory(outFolder);
}
string bscPath = Path.GetFullPath("pointsupportreactions.bsc");
List <string> bscPaths = new List <string>();
bscPaths.Add(bscPath);
// READ MODEL
Model model = Model.DeserializeFromFilePath(struxmlPath);
// READ SLAB TO ANALYSE
// In this example, the slab is card-coded to no. 5; if you make any personal applications,
// it is probably better to look for a slab with a certain name, eg. P.1, to avoid confusion.
Shells.Slab slab = model.Entities.Slabs[4];
Materials.Material material = model.Entities.Slabs[4].Material;
double Ecm = Convert.ToDouble(material.Concrete.Ecm);
// ITERATION & ANALYSIS PROCESS
// Iterate over model using different E-modulus for the slab
for (int i = 1; i < 6; i++)
{
// Change E-modulus
double new_Ecm = Math.Round(0.2 * i * Ecm);
material.Concrete.Ecm = Convert.ToString(new_Ecm);
// Save struxml
string outPathIndividual = Path.GetFullPath(outFolder + "sample_slab_out" + Convert.ToString(new_Ecm) + ".struxml");
model.SerializeModel(outPathIndividual);
// Run analysis
Calculate.Analysis analysis = new Calculate.Analysis(null, null, null, null, calcCase: true, false, false, false, false, false, false, false, false, false, false, false, false);
FemDesign.Calculate.FdScript fdScript = FemDesign.Calculate.FdScript.Analysis(outPathIndividual, analysis, bscPaths, "", true);
Calculate.Application app = new Calculate.Application();
app.RunFdScript(fdScript, false, true, true);
string pointSupportReactionsPath = Path.Combine(outFolder, "pointsupportreactions.csv");
// Reading results (This method is only available for some result types as of now, but more will be added)
var results = Results.ResultsReader.Parse(pointSupportReactionsPath);
var pointSupportReactions = results.Cast <Results.PointSupportReaction>().ToList();
// Print results
Console.WriteLine();
Console.WriteLine($"Emean: {new_Ecm}");
Console.WriteLine("Id | Reaction ");
foreach (var reaction in pointSupportReactions)
{
Console.WriteLine($"{reaction.Id,10} | {reaction.Fz,10}");
}
}
// ENDING THE PROGRAM
Console.WriteLine("\nPress any key to close console.");
Console.ReadKey();
}
