Method commit

SRC/analysis/integrator/CollocationHSFixedNumIter.cpp:460–513

int CollocationHSFixedNumIter::commit(void)
{
    AnalysisModel *theModel = this->getAnalysisModel();
    if (theModel == 0)  {
        opserr << "WARNING CollocationHSFixedNumIter::commit() - no AnalysisModel set\n";
        return -1;
    }
    
    LinearSOE *theSOE = this->getLinearSOE();
    if (theSOE == 0)  {
        opserr << "WARNING CollocationHSFixedNumIter::commit() - no LinearSOE set\n";
        return -2;
    }
    
    if (theSOE->solve() < 0)  {
        opserr << "WARNING CollocationHSFixedNumIter::commit() - "
            << "the LinearSysOfEqn failed in solve()\n";
        return -3;
    }
    const Vector &deltaU = theSOE->getX();
    
    // determine the response at t+theta*deltaT
    U->addVector(1.0, deltaU, c1);
    
    Udot->addVector(1.0, deltaU, c2);
    
    Udotdot->addVector(1.0, deltaU, c3);
    
    // determine response quantities at t+deltaT
    Udotdot->addVector(1.0/theta, *Utdotdot, (theta-1.0)/theta);
    
    (*Udot) = *Utdot;
    double a1 = deltaT*(1.0 - gamma);
    double a2 = deltaT*gamma;
    Udot->addVector(1.0, *Utdotdot, a1);
    Udot->addVector(1.0, *Udotdot, a2);
    
    (*U) = *Ut;
    U->addVector(1.0, *Utdot, deltaT);
    double a3 = deltaT*deltaT*(0.5 - beta);
    double a4 = deltaT*deltaT*beta;
    U->addVector(1.0, *Utdotdot, a3);
    U->addVector(1.0, *Udotdot, a4);
    
    // update the response at the DOFs
    theModel->setResponse(*U, *Udot, *Udotdot);
    
    // set the time to be t+deltaT
    double time = theModel->getCurrentDomainTime();
    time += (1.0-theta)*deltaT;
    theModel->setCurrentDomainTime(time);
    
    return theModel->commitDomain();
}


const Vector &