C++ AnalysisModel::setDisp方法代码示例

int PFEMIntegrator::newStep(double deltaT)
{

    if (deltaT <= 0.0)  {
        opserr << "PFEMIntegrator::newStep() - error in variable\n";
        opserr << "dT = " << deltaT << endln;
        return -2;	
    }

    // get a pointer to the AnalysisModel and Domain
    AnalysisModel *theModel = this->getAnalysisModel();
    if(theModel == 0) {
        opserr << "Analysis model has not been linked - PFEMIntegrator::newStep()\n";
        return -1;
    }
    Domain* theDomain = theModel->getDomainPtr();
    if(theDomain == 0) {
        opserr<<"WARNING: no domain is set for the model";
        opserr<<" -- PFEMIntegrator::newStep()\n";
        return -1;
    }
    
    // set the constants
    c1 = deltaT;
    c2 = 1.0;
    c3 = 1.0/deltaT;

    c4 = deltaT*deltaT;
    c5 = deltaT;
    c6 = 1.0;

    // check if domainchange() is called
    if (U == 0)  {
        opserr << "PFEMIntegrator::newStep() - domainChange() failed or hasn't been called\n";
        return -3;	
    }
    
    // set response at t to be that at t+deltaT of previous step
    (*Ut) = *U;        
    (*Utdot) = *Udot;  
    (*Utdotdot) = *Udotdot;
    
    // determinte new disps and accels
    U->addVector(1.0, *Utdot, deltaT);
    Udotdot->Zero();

    // set states
    theModel->setDisp(*U);
    theModel->setAccel(*Udotdot);
    
    // increment the time to t+deltaT and apply the load
    double time = theModel->getCurrentDomainTime();
    time += deltaT;
    if (theModel->updateDomain(time, deltaT) < 0)  {
        opserr << "PFEMIntegrator::newStep() - failed to update the domain\n";
        return -4;
    }
    
    return 0;
}

int AlphaOS::update(const Vector &deltaU)
{
    updateCount++;
    if (updateCount > 1)  {
        opserr << "WARNING AlphaOS::update() - called more than once -";
        opserr << " AlphaOS integration scheme requires a LINEAR solution algorithm\n";
        return -1;
    }
    
    AnalysisModel *theModel = this->getAnalysisModel();
    if (theModel == 0)  {
        opserr << "WARNING AlphaOS::update() - no AnalysisModel set\n";
        return -2;
    }
    
    // check domainChanged() has been called, i.e. Ut will not be zero
    if (Ut == 0)  {
        opserr << "WARNING AlphaOS::update() - domainChange() failed or not called\n";
        return -3;
    }
    
    // check deltaU is of correct size
    if (deltaU.Size() != U->Size())  {
        opserr << "WARNING AlphaOS::update() - Vectors of incompatible size ";
        opserr << " expecting " << U->Size() << " obtained " << deltaU.Size() << "\n";
        return -4;
    }
    
    // save the predictor displacements
    (*Upt) = *U;
    
    //  determine the response at t+deltaT
    U->addVector(1.0, deltaU, c1);
    
    Udot->addVector(1.0, deltaU, c2);
    
    Udotdot->addVector(0.0, deltaU, c3);
    
    // update the response at the DOFs
    theModel->setVel(*Udot);
    theModel->setAccel(*Udotdot);
    if (theModel->updateDomain() < 0)  {
        opserr << "AlphaOS::update() - failed to update the domain\n";
        return -5;
    }
    // do not update displacements in elements only at nodes
    theModel->setDisp(*U);
    
    return 0;
}

int
CentralDifferenceAlternative::update(const Vector &X)
{
  updateCount++;
  if (updateCount > 1) {
    opserr << "ERROR CentralDifferenceAlternative::update() - called more than once -";
    opserr << " Central Difference integraion schemes require a LINEAR solution algorithm\n";
    return -1;
  }
  
  AnalysisModel *theModel = this->getAnalysisModel();

  if (theModel == 0) {
    opserr << "ERROR CentralDifferenceAlternative::update() - no AnalysisModel set\n";
    return -2;
  }	
  
  // check domainChanged() has been called, i.e. Ut will not be zero
  if (Ut == 0) {
    opserr << "WARNING CentralDifferenceAlternative::update() - domainChange() failed or not called\n";
    return -2;
  }	

  // check deltaU is of correct size
  if (X.Size() != Ut->Size()) {
    opserr << "WARNING CentralDifferenceAlternative::update() - Vectors of incompatible size ";
    opserr << " expecting " << Ut->Size() << " obtained " << X.Size() << endln;
    return -3;
  }


  //  determine the displacement at t+delta t 
  Utp1->addVector(0.0, X, deltaT * deltaT);
  (*Utp1) += *Ut;
  Utp1->addVector(1.0, *Udot, deltaT);

  //  determine the vel at t+ 0.5 * delta t 
  (*Udot) =  *Utp1;
  (*Udot) -= *Ut;
  (*Udot) *= (1.0/deltaT);

  // update the disp & responses at the DOFs
  theModel->setDisp(*Utp1);
  theModel->setVel(*Udot);
  theModel->updateDomain();

  return 0;
  }    

int Newmark::newStep(double deltaT)
{
    if (beta == 0 || gamma == 0)  {
        opserr << "Newmark::newStep() - error in variable\n";
        opserr << "gamma = " << gamma << " beta = " << beta << endln;
        return -1;
    }
    
    if (deltaT <= 0.0)  {
        opserr << "Newmark::newStep() - error in variable\n";
        opserr << "dT = " << deltaT << endln;
        return -2;	
    }

    // get a pointer to the AnalysisModel
    AnalysisModel *theModel = this->getAnalysisModel();
    
    // set the constants
    if (displ == true)  {
        c1 = 1.0;
        c2 = gamma/(beta*deltaT);
        c3 = 1.0/(beta*deltaT*deltaT);
    } else  {
        c1 = beta*deltaT*deltaT;
        c2 = gamma*deltaT;
        c3 = 1.0;
    }
    
    if (U == 0)  {
        opserr << "Newmark::newStep() - domainChange() failed or hasn't been called\n";
        return -3;	
    }
    
    // set response at t to be that at t+deltaT of previous step
    (*Ut) = *U;        
    (*Utdot) = *Udot;  
    (*Utdotdot) = *Udotdot;
    
    if (displ == true)  {    
        // determine new velocities and accelerations at t+deltaT
        double a1 = (1.0 - gamma/beta); 
        double a2 = (deltaT)*(1.0 - 0.5*gamma/beta);
        Udot->addVector(a1, *Utdotdot, a2);
        
        double a3 = -1.0/(beta*deltaT);
        double a4 = 1.0 - 0.5/beta;
        Udotdot->addVector(a4, *Utdot, a3);

        // set the trial response quantities
        theModel->setVel(*Udot);
        theModel->setAccel(*Udotdot);
    } else  {
        // determine new displacements and velocities at t+deltaT      
        double a1 = (deltaT*deltaT/2.0);
        U->addVector(1.0, *Utdot, deltaT);
        U->addVector(1.0, *Utdotdot, a1);
        
        Udot->addVector(1.0, *Utdotdot, deltaT);

        // set the trial response quantities
        theModel->setDisp(*U);
        theModel->setVel(*Udot);
    }

    // increment the time to t+deltaT and apply the load
    double time = theModel->getCurrentDomainTime();
    time += deltaT;
    if (theModel->updateDomain(time, deltaT) < 0)  {
        opserr << "Newmark::newStep() - failed to update the domain\n";
        return -4;
    }
    
    return 0;
}