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NewtonRaphson.cpp Go to the documentation of this file. /* ****************************************************************** ** ** OpenSees - Open System for Earthquake Engineering Simulation ** ** Pacific Earthquake Engineering Research Center ** ** ** ** ** ** (C) Copyright 1999, The Regents of the University of California ** ** All Rights Reserved. ** ** ** ** Commercial use of this program without express permission of the ** ** University of California, Berkeley, is strictly prohibited. See ** ** file 'COPYRIGHT' in main directory for information on usage and ** ** redistribution, and for a DISCLAIMER OF ALL WARRANTIES. ** ** ** ** Developed by: ** ** Frank McKenna (fmckenna@ce.berkeley.edu) ** ** Gregory L. Fenves (fenves@ce.berkeley.edu) ** ** Filip C. Filippou (filippou@ce.berkeley.edu) ** ** ** ** ****************************************************************** */ // $Revision: 1.9 $ // $Date: 2005/11/29 22:42:42 $ // $Source: /usr/local/cvs/OpenSees/SRC/analysis/algorithm/equiSolnAlgo/NewtonRaphson.cpp,v $ // File: ~/OOP/analysis/algorithm/NewtonRaphson.C // // Written: fmk // Created: Sun Sept 15 15:06:47: 1996 // Revision: A // // Description: This file contains the class definition for // NewtonRaphson. NewtonRaphson is a class which uses the // Newton-Raphson solution algorihm // to solve the equations. No member functions are declared as virtual as // it is not expected that this class will be subclassed. // // What: "@(#)NewtonRaphson.C, revA" #include <NewtonRaphson.h> #include <AnalysisModel.h> #include <StaticAnalysis.h> #include <IncrementalIntegrator.h> #include <LinearSOE.h> #include <Channel.h> #include <FEM_ObjectBroker.h> #include <ConvergenceTest.h> #include <ID.h> // Constructor NewtonRaphson::NewtonRaphson(int theTangentToUse) :EquiSolnAlgo(EquiALGORITHM_TAGS_NewtonRaphson), theTest(0), tangent(theTangentToUse) { } NewtonRaphson::NewtonRaphson(ConvergenceTest &theT, int theTangentToUse) :EquiSolnAlgo(EquiALGORITHM_TAGS_NewtonRaphson), theTest(&theT), tangent(theTangentToUse) { } // Destructor NewtonRaphson::~NewtonRaphson() { } int NewtonRaphson::setConvergenceTest(ConvergenceTest *newTest) { theTest = newTest; return 0; } int NewtonRaphson::solveCurrentStep(void) { // set up some pointers and check they are valid // NOTE this could be taken away if we set Ptrs as protecetd in superclass AnalysisModel *theAnaModel = this->getAnalysisModelPtr(); IncrementalIntegrator *theIntegrator = this->getIncrementalIntegratorPtr(); LinearSOE *theSOE = this->getLinearSOEptr(); if ((theAnaModel == 0) || (theIntegrator == 0) || (theSOE == 0) || (theTest == 0)){ opserr << "WARNING NewtonRaphson::solveCurrentStep() - setLinks() has"; opserr << " not been called - or no ConvergenceTest has been set\n"; return -5; } if (theIntegrator->formUnbalance() < 0) { opserr << "WARNING NewtonRaphson::solveCurrentStep() -"; opserr << "the Integrator failed in formUnbalance()\n"; return -2; } // set itself as the ConvergenceTest objects EquiSolnAlgo theTest->setEquiSolnAlgo(*this); if (theTest->start() < 0) { opserr << "NewtnRaphson::solveCurrentStep() -"; opserr << "the ConvergenceTest object failed in start()\n"; return -3; } int result = -1; int count = 0; do { if (tangent == INITIAL_THEN_CURRENT_TANGENT) { if (count == 0) { if (theIntegrator->formTangent(INITIAL_TANGENT) < 0){ opserr << "WARNING NewtonRaphson::solveCurrentStep() -"; opserr << "the Integrator failed in formTangent()\n"; return -1; } } else { if (theIntegrator->formTangent(CURRENT_TANGENT) < 0){ opserr << "WARNING NewtonRaphson::solveCurrentStep() -"; opserr << "the Integrator failed in formTangent()\n"; return -1; } } } else { if (theIntegrator->formTangent(tangent) < 0){ opserr << "WARNING NewtonRaphson::solveCurrentStep() -"; opserr << "the Integrator failed in formTangent()\n"; return -1; } } if (theSOE->solve() < 0) { opserr << "WARNING NewtonRaphson::solveCurrentStep() -"; opserr << "the LinearSysOfEqn failed in solve()\n"; return -3; } if (theIntegrator->update(theSOE->getX()) < 0) { opserr << "WARNING NewtonRaphson::solveCurrentStep() -"; opserr << "the Integrator failed in update()\n"; return -4; } if (theIntegrator->formUnbalance() < 0) { opserr << "WARNING NewtonRaphson::solveCurrentStep() -"; opserr << "the Integrator failed in formUnbalance()\n"; return -2; } result = theTest->test(); this->record(count++); } while (result == -1); if (result == -2) { opserr << "NewtnRaphson::solveCurrentStep() -"; opserr << "the ConvergenceTest object failed in test()\n"; return -3; } // note - if postive result we are returning what the convergence test returned // which should be the number of iterations return result; } ConvergenceTest * NewtonRaphson::getConvergenceTest(void) { return theTest; } int NewtonRaphson::sendSelf(int cTag, Channel &theChannel) { static ID data(1); data(0) = tangent; return theChannel.sendID(this->getDbTag(), cTag, data); } int NewtonRaphson::recvSelf(int cTag, Channel &theChannel, FEM_ObjectBroker &theBroker) { static ID data(1); theChannel.recvID(this->getDbTag(), cTag, data); tangent = data(0); return 0; } void NewtonRaphson::Print(OPS_Stream &s, int flag) { if (flag == 0) { s << "NewtonRaphson" << endln; } } Generated on Mon Oct 23 15:04:57 2006 for OpenSees by  1.5.0

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