InertialForce.C

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html
 
#include "InertialForce.h"
#include "SubProblem.h"
#include "TimeIntegrator.h"
#include "NonlinearSystemBase.h"
 
registerMooseObject("SolidMechanicsApp", InertialForce);
registerMooseObject("SolidMechanicsApp", ADInertialForce);
 
template <bool is_ad>
InputParameters
InertialForceTempl<is_ad>::validParams()
{
  InputParameters params = InertialForceParent<is_ad>::validParams();
  params.addClassDescription("Calculates the residual for the inertial force "
                             "($M \\cdot acceleration$) and the contribution of mass"
                             " dependent Rayleigh damping and HHT time "
                             " integration scheme ($\\eta \\cdot M \\cdot"
                             " ((1+\\alpha)velq2-\\alpha \\cdot vel-old) $)");
  params.set<bool>("use_displaced_mesh") = true;
  params.addCoupledVar("velocity", "velocity variable");
  params.addCoupledVar("acceleration", "acceleration variable");
  params.addParam<Real>("beta", "beta parameter for Newmark Time integration");
  params.addParam<Real>("gamma", "gamma parameter for Newmark Time integration");
  params.addParam<MaterialPropertyName>("eta",
                                        0.0,
                                        "Name of material property or a constant real "
                                        "number defining the eta parameter for the "
                                        "Rayleigh damping.");
  params.addParam<MaterialPropertyName>(
      "density_scaling",
      0.0,
      "Name of material property to add mass scaling in explicit simulations.");
  params.addParam<Real>("alpha",
                        0,
                        "alpha parameter for mass dependent numerical damping induced "
                        "by HHT time integration scheme");
  params.addParam<MaterialPropertyName>(
      "density", "density", "Name of Material Property that provides the density");
  return params;
}
 
template <bool is_ad>
InertialForceTempl<is_ad>::InertialForceTempl(const InputParameters & parameters)
  : InertialForceParent<is_ad>(parameters),
    _density(this->template getGenericMaterialProperty<Real, is_ad>("density")),
    _has_beta(this->isParamValid("beta")),
    _has_gamma(this->isParamValid("gamma")),
    _beta(_has_beta ? this->template getParam<Real>("beta") : 0.1),
    _gamma(_has_gamma ? this->template getParam<Real>("gamma") : 0.1),
    _has_velocity(this->isParamValid("velocity")),
    _has_acceleration(this->isParamValid("acceleration")),
    _eta(this->template getGenericMaterialProperty<Real, is_ad>("eta")),
    _density_scaling(this->template getMaterialProperty<Real>("density_scaling")),
    _alpha(this->template getParam<Real>("alpha")),
    _time_integrator(_sys.getTimeIntegrator(this->_var.number()))
{
  if (_has_beta && _has_gamma && _has_velocity && _has_acceleration)
  {
    _vel_old = &this->coupledValueOld("velocity");
    _accel_old = &this->coupledValueOld("acceleration");
    _u_old = &this->valueOld();
  }
  else if (!_has_beta && !_has_gamma && !_has_velocity && !_has_acceleration)
  {
    _u_dot_old = &(_var.uDotOld());
    _du_dot_du = &(_var.duDotDu());
    _du_dotdot_du = &(_var.duDotDotDu());
 
    this->addFEVariableCoupleableVectorTag(_time_integrator.uDotFactorTag());
    this->addFEVariableCoupleableVectorTag(_time_integrator.uDotDotFactorTag());
 
    _u_dot_factor = &_var.vectorTagValue(_time_integrator.uDotFactorTag());
    _u_dotdot_factor = &_var.vectorTagValue(_time_integrator.uDotDotFactorTag());
 
    if (_time_integrator.isLumped())
    {
      _u_dot_factor_dof = &_var.vectorTagDofValue(_time_integrator.uDotFactorTag());
      _u_dotdot_factor_dof = &_var.vectorTagDofValue(_time_integrator.uDotDotFactorTag());
    }
  }
  else
    mooseError("InertialForce: Either all or none of `beta`, `gamma`, `velocity`and `acceleration` "
               "should be provided as input.");
 
  // Check if HHT and explicit are being used simultaneously
  if (_alpha != 0 && _time_integrator.isExplicit())
    mooseError("InertialForce: HHT time integration parameter can only be used with Newmark-Beta "
               "time integration.");
 
  // Check if beta and explicit are being used simultaneously
  if (_has_beta && _time_integrator.isExplicit())
    mooseError("InertialForce: Newmark-beta integration parameter, beta, cannot be provided along "
               "with an explicit time "
               "integrator.");
 
  if (!(_time_integrator.isLumped() && _time_integrator.isExplicit()))
    if (parameters.isParamSetByUser("density_scaling"))
      this->paramError(
          "density_scaling",
          "Density (mass) scaling can only be used in lumped mass, explicit simulations");
}
 
template <bool is_ad>
std::pair<GenericReal<is_ad>, GenericReal<is_ad>>
InertialForceTempl<is_ad>::computeNewmarkBetaVelAccel(const GenericReal<is_ad> & u,
                                                      const Real u_old,
                                                      const Real vel_old,
                                                      const Real accel_old,
                                                      const Real beta,
                                                      const Real gamma,
                                                      const Real dt)
{
  const auto accel =
      1.0 / beta * (((u - u_old) / (dt * dt)) - vel_old / dt - accel_old * (0.5 - beta));
  const auto vel = vel_old + (dt * (1.0 - gamma)) * accel_old + gamma * dt * accel;
  return {vel, accel};
}
 
template <bool is_ad>
GenericReal<is_ad>
InertialForceTempl<is_ad>::computeQpResidual()
{
  if (_dt == 0)
    return 0;
  else if (_has_beta)
  {
    const auto [vel, accel] = computeNewmarkBetaVelAccel(
        _u[_qp], (*_u_old)[_qp], (*_vel_old)[_qp], (*_accel_old)[_qp], _beta, _gamma, _dt);
    return _test[_i][_qp] * _density[_qp] *
           (accel + vel * _eta[_qp] * (1.0 + _alpha) - _alpha * _eta[_qp] * (*_vel_old)[_qp]);
  }
 
  // Lumped mass option
  // Only lumping the masses here
  // will multiply by corresponding residual multiplier after lumping the matrix
  // Density scaling is a fictitious added density to increase the time step
  else if (_time_integrator.isLumped() && _time_integrator.isExplicit() && !is_ad)
    return _test[_i][_qp] * (_density[_qp] + _density_scaling[_qp]);
 
  // Consistent mass option
  // Same for explicit, implicit, and implicit with HHT
  else
    return _test[_i][_qp] * _density[_qp] *
           ((*_u_dotdot_factor)[_qp] + (*_u_dot_factor)[_qp] * _eta[_qp] * (1.0 + _alpha) -
            _alpha * _eta[_qp] * (*_u_dot_old)[_qp]);
}
 
template <>
void
InertialForceTempl<true>::computeResidualAdditional()
{
  mooseError("Internal error");
}
 
template <>
void
InertialForceTempl<false>::computeResidualAdditional()
{
  if (_dt == 0)
    return;
 
  // Explicit lumped only
  if (!_time_integrator.isLumped() || !_time_integrator.isExplicit())
    return;
 
  for (unsigned int i = 0; i < _test.size(); ++i)
    this->_local_re(i) *= (*_u_dotdot_factor_dof)[i] + _eta[0] * (*_u_dot_factor_dof)[i];
}
 
template <>
Real
InertialForceTempl<true>::computeQpJacobian()
{
  mooseError("Internal error");
}
 
template <>
Real
InertialForceTempl<false>::computeQpJacobian()
{
  if (_dt == 0)
    return 0;
  else
  {
    if (_has_beta)
      return _test[_i][_qp] * _density[_qp] / (_beta * _dt * _dt) * _phi[this->_j][_qp] +
             _eta[_qp] * (1 + _alpha) * _test[_i][_qp] * _density[_qp] * _gamma / _beta / _dt *
                 _phi[this->_j][_qp];
    else
      return _test[_i][_qp] * _density[_qp] * (*_du_dotdot_du)[_qp] * _phi[this->_j][_qp] +
             _eta[_qp] * (1 + _alpha) * _test[_i][_qp] * _density[_qp] * (*_du_dot_du)[_qp] *
                 _phi[this->_j][_qp];
  }
}
 
template class InertialForceTempl<false>;
template class InertialForceTempl<true>;