feapproblem.java

来自「平面三角形有限元程序」· Java 代码 · 共 114 行

/*
 * FeapProblem.java
 *
 * Created on 12. Oktober 2002, 20:01
 */
/**
 * @author Christian Uhde
 */
import java.util.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;


public class FeapProblem
{
    String name;                      // I guess it's the name!
    String comment;                // so what do you think?
    int numnp = 0;                        // number of nodal points
    int numel = 0;                         // number of elements
    int nummat = 0;                      // number of materials
    int ndm = 0;                            // space dimensions of mesh
    int ndf = 0;                             // maximum number of unknowns per node
    int nen = 0;                             // maximum number of unknowns per element
    Vector materials;                //  materials objekts used in current problem
    
    String coordinateString;
    String elementString;
    String forceString;
    String boundsString;
    
    /** Creates a new instance of FeapProblem */
    public FeapProblem(String name) {
        this.name = name;
        comment = "";
         coordinateString = new String();
         elementString = new String();
         forceString = new String();
         boundsString = new String();
        materials = new Vector();

    }
    
    /** Add material to problem */
    public void addMaterial(Object obj, JPanel p) {
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(3, 5, 3, 5);
        gbc.gridx = 0;
        gbc.gridy = materials.size();
        
        if(obj instanceof FeapMatTruss) {
            FeapMatTruss truss = (FeapMatTruss)obj;
            p.add(truss, gbc);
            materials.addElement(truss);
        } else if(obj instanceof FeapMatFrame) {
            FeapMatFrame frame = (FeapMatFrame)obj;
            p.add(frame, gbc);
            materials.addElement(frame);
        } else if(obj instanceof FeapMatSolidElasticIso) {
            FeapMatSolidElasticIso solid = (FeapMatSolidElasticIso)obj;
            p.add(solid, gbc);
            materials.addElement(solid);
        }
        p.updateUI();
        
    }

    /** Writes a Feap inputfile to file "filename" */
    public void writeFeapFile(String filename) {
        FileWriter outputfile;
        
        try {
                outputfile = new FileWriter(filename);
                // print name, comment, numnp, numel, ndm, ndf, nen
                outputfile.write("feap " + name + ", " + comment + "  \n");
                outputfile.write("" + numnp + " " + numel + " " + nummat + " " + ndm + " " + ndf + " " + nen+ "\n\n");
                // print materials
                for(int k = 0; k < materials.size(); k++) {
                    outputfile.write("MATErial " + (k+1) + "\n");
                    FeapMaterial fm = (FeapMaterial) materials.elementAt(k);
                    outputfile.write("" + fm.writeFeapFile());
                }
                // print nodes
                outputfile.write("COORdinate\n");
                outputfile.write(coordinateString);
                outputfile.write("\n");
                // print elements
                outputfile.write("ELEMent\n");
                outputfile.write(elementString);
                outputfile.write("\n");
                // print boundaries
                outputfile.write("BOUNdary\n");
                outputfile.write(boundsString);
                outputfile.write("\n");
                // print forces
                outputfile.write("FORCe\n");
                outputfile.write(forceString);
                outputfile.write("\n");
                // print batch entries
//                outputfile.write("BATCh\n");
//                outputfile.write("tang,,1\ndisp all\nstress all\n");
                outputfile.write("END\n\n");
                outputfile.write("INTEractive\n\n");
                outputfile.write("STOP\n\n");
                // close outputfile
                outputfile.close();
        } catch(IOException e) {
            System.out.println("Could not write file \"" + filename + "\"");
        }
        
    }
    
}