Solveur_Newmark.h

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#ifndef Solveur_Newmark_included
#define Solveur_Newmark_included
 
#include <Solveur_non_lineaire.h>
 
class Equation_Navier_Cauchy;
 
/*! @brief Newmark time integration scheme for linear elasticity.
 *
 *  Advances the Navier-Cauchy equation in time using Newmark parameters.
 *  Supports average-acceleration settings through beta and gamma defaults.
 */
class Solveur_Newmark : public Solveur_non_lineaire
{
  Declare_instanciable(Solveur_Newmark);
 
public:
  bool iterer_eqn(Equation_base& equation, const DoubleTab& inconnue, DoubleTab& result, double dt, int numero_iteration, int& ok) override;
  Entree& lire(const Motcle&, Entree&) override;
 
private:
  DoubleTab v_n_, a_n_;
  DoubleTab v_kp1_, a_kp1_;
  DoubleTab u_pred_, v_pred_;
 
  // Newmark parameters (average acceleration)
  double beta_ = 0.25;
  double gamma_ = 0.5;
  double alpha_ = 0.0;
};
 
#endif