int AlphaOSGeneralized::formElementResidual(void)
{
// calculate Residual Force
AnalysisModel *theModel = this->getAnalysisModel();
LinearSOE *theSOE = this->getLinearSOE();
// loop through the FE_Elements and add the residual
FE_Element *elePtr;
FE_EleIter &theEles = theModel->getFEs();
while((elePtr = theEles()) != 0) {
if (theSOE->addB(elePtr->getResidual(this), elePtr->getID()) < 0) {
opserr << "WARNING AlphaOSGeneralized::formElementResidual -";
opserr << " failed in addB for ID " << elePtr->getID();
return -1;
}
if (alphaF < 1.0) {
if (statusFlag == CURRENT_TANGENT) {
if (theSOE->addB(elePtr->getK_Force(*Ut-*Upt), elePtr->getID(), alphaF-1.0) < 0) {
opserr << "WARNING AlphaOSGeneralized::formElementResidual -";
opserr << " failed in addB for ID " << elePtr->getID();
return -2;
}
} else if (statusFlag == INITIAL_TANGENT) {
if (theSOE->addB(elePtr->getKi_Force(*Ut-*Upt), elePtr->getID(), alphaF-1.0) < 0) {
opserr << "WARNING AlphaOSGeneralized::formElementResidual -";
opserr << " failed in addB for ID " << elePtr->getID();
return -2;
}
}
}
}
return 0;
}
int
PFEMIntegrator::formSensitivityRHS(int passedGradNumber)
{
sensitivityFlag = 1;
// Set a couple of data members
gradNumber = passedGradNumber;
// Get pointer to the SOE
LinearSOE *theSOE = this->getLinearSOE();
// Get the analysis model
AnalysisModel *theModel = this->getAnalysisModel();
// Randomness in external load (including randomness in time series)
// Get domain
Domain *theDomain = theModel->getDomainPtr();
// Loop through nodes to zero the unbalaced load
Node *nodePtr;
NodeIter &theNodeIter = theDomain->getNodes();
while ((nodePtr = theNodeIter()) != 0)
nodePtr->zeroUnbalancedLoad();
// Loop through load patterns to add external load sensitivity
LoadPattern *loadPatternPtr;
LoadPatternIter &thePatterns = theDomain->getLoadPatterns();
double time;
while((loadPatternPtr = thePatterns()) != 0) {
time = theDomain->getCurrentTime();
loadPatternPtr->applyLoadSensitivity(time);
}
// Randomness in element/material contributions
// Loop through FE elements
FE_Element *elePtr;
FE_EleIter &theEles = theModel->getFEs();
while((elePtr = theEles()) != 0) {
theSOE->addB( elePtr->getResidual(this), elePtr->getID() );
}
// Loop through DOF groups (IT IS IMPORTANT THAT THIS IS DONE LAST!)
DOF_Group *dofPtr;
DOF_GrpIter &theDOFs = theModel->getDOFs();
while((dofPtr = theDOFs()) != 0) {
theSOE->addB( dofPtr->getUnbalance(this), dofPtr->getID() );
}
// Reset the sensitivity flag
sensitivityFlag = 0;
return 0;
}