Method formUnbalance

SRC/analysis/integrator/HHTExplicit_TP.cpp:217–249

int HHTExplicit_TP::formUnbalance()
{
    // get a pointer to the LinearSOE and the AnalysisModel
    LinearSOE *theLinSOE = this->getLinearSOE();
    AnalysisModel *theModel = this->getAnalysisModel();
    if (theLinSOE == 0 || theModel == 0)  {
        opserr << "WARNING HHTExplicit_TP::formUnbalance() - ";
        opserr << "no LinearSOE or AnalysisModel has been set\n";
        return -1;
    }
    
    theLinSOE->setB(*Put);
    
    // do modal damping
    const Vector *modalValues = theModel->getModalDampingFactors();
    if (modalValues != 0)  {
        this->addModalDampingForce(modalValues);
    }
    
    if (this->formElementResidual() < 0)  {
        opserr << "WARNING HHTExplicit_TP::formUnbalance() ";
        opserr << " - this->formElementResidual failed\n";
        return -2;
    }
    
    if (this->formNodalUnbalance() < 0)  {
        opserr << "WARNING HHTExplicit_TP::formUnbalance() ";
        opserr << " - this->formNodalUnbalance failed\n";
        return -3;
    }
    
    return 0;
}


int HHTExplicit_TP::formEleTangent(FE_Element *theEle)