Multiobjective Design Optimization of Grillage Systems according to LRFD-AISC

Algorithm 5

An example input for AbYSS algorithm coded in Java.

public class AbYSSstudy extends Experiment {

…

public void algorithmSettings(Problem problem, int problemIndex) {

…

  parameters [0].setProperty(“POPULATION_SIZE”, “50”);

  parameters [0].setProperty(“MAX_EVOLUTIONS”, “500”);

  parameters [0].setProperty(“REF_SET1_SIZE”, “20”);

  parameters [0].setProperty(“REF_SET2_SIZE”, “20”);

  parameters [0].setProperty(“ARCHIVE_SIZE”, “40”);

  parameters [0].setProperty(“CROSSOVER_PROBABILITY”,

“1.00”);

  parameters [0].setProperty(“MUTATION_PROBABILITY”,

“1.00”);

  parameters [0].setProperty(“IMPROVEMENT_ROUNDS”, “1”);

…                       }

public static void main(String [] args) throws JMException,

IOException  {

…

 exp.experimentName_ = “AbYSSstudy”;

 exp.algorithmNameList_ =newString           []

{“AbYSSa”,“AbYSSb”,“AbYSSc”,“AbYSSd”,“AbYSSe”,“AbYSSf”,“AbYS

Sg”,“AbYSSh”,“AbYSSi”,“AbYSSl”,“AbYSSm”,“AbYSSn”,“AbYSSo”,“A

bYSSp”,“AbYSSr”,“AbYSSs”};

 exp.problemList_ = new String []{“example1”};

 exp.paretoFrontFile_ = new String []{“example1.pf”};

 exp.indicatorList_ = new String []{“HV”, “SPREAD”, “IGD”,

“EPSILON”};

…

 exp.independentRuns_ = 10;   }}

public class example1 extends Problem {

 public example1(String solutionType) {

  numberOfVariables_ = 5;

  numberOfObjectives_ = 2;

  numberOfConstraints_ = 5;

  problemName_ = “example1”;

  lowerLimit_ = new double [numberOfVariables_ ];

  upperLimit_ = new double [numberOfVariables_ ];

  lowerLimit_ [0] = 1;

  lowerLimit_ [1] = 1;

  upperLimit_ [0] = 274;

  upperLimit_ [1] = 274;

  variableType_ = new VariableType_ [numberOfVariables_ ];

  length_  = new int [numberOfVariables_ ];

  length_ = new int [numberOfVariables_ ];

  solutionType  _  = Enum.valueOf(VariableType_.class,

  “SolutionType”);

  for (int var = 0; var < numberOfVariables_; var ++){

  variableType_ [𝑣𝑎𝑟]   =  Enum.valueOf(VariableType_.class,

 solutionType);

  length_ [𝑣𝑎𝑟]   = numberOfBits;

  }

               }

 public example1 (){

 }

 public void evaluate(Solution solution) throws JMException {

 …    }

 public void evaluateConstraints(Solution solution) throws

 JMException {

 …  }