MFEM
v4.5.2
Finite element discretization library

#include <ode.hpp>
Public Member Functions  
GeneralizedAlpha2Solver (double rho_inf=1.0)  
void  PrintProperties (std::ostream &out=mfem::out) 
void  Init (SecondOrderTimeDependentOperator &f_) override 
Associate a TimeDependentOperator with the ODE solver. More...  
void  Step (Vector &x, Vector &dxdt, double &t, double &dt) override 
Perform a time step from time t [in] to time t [out] based on the requested step size dt [in]. More...  
int  GetMaxStateSize () override 
Function for getting and setting the state vectors. More...  
int  GetStateSize () override 
const Vector &  GetStateVector (int i) override 
void  GetStateVector (int i, Vector &state) override 
void  SetStateVector (int i, Vector &state) override 
Public Member Functions inherited from mfem::SecondOrderODESolver  
SecondOrderODESolver ()  
virtual void  Run (Vector &x, Vector &dxdt, double &t, double &dt, double tf) 
Perform time integration from time t [in] to time tf [in]. More...  
virtual  ~SecondOrderODESolver () 
Protected Attributes  
Vector  xa 
Vector  va 
Vector  aa 
Vector  d2xdt2 
double  alpha_f 
double  alpha_m 
double  beta 
double  gamma 
int  nstate 
Protected Attributes inherited from mfem::SecondOrderODESolver  
SecondOrderTimeDependentOperator *  f 
Pointer to the associated TimeDependentOperator. More...  
MemoryType  mem_type 
Generalizedalpha ODE solver A Time Integration Algorithm for Structural Dynamics With Improved Numerical Dissipation: The Generalizedα Method J.Chung and G.M. Hulbert, J. Appl. Mech 60(2), 371375, 1993 https://doi.org/10.1115/1.2900803 rho_inf in [0,1]

inline 

inlineoverridevirtual 
Function for getting and setting the state vectors.
Reimplemented from mfem::SecondOrderODESolver.

inlineoverridevirtual 
Reimplemented from mfem::SecondOrderODESolver.

overridevirtual 
Reimplemented from mfem::SecondOrderODESolver.

overridevirtual 
Reimplemented from mfem::SecondOrderODESolver.

overridevirtual 
Associate a TimeDependentOperator with the ODE solver.
This method has to be called:
Reimplemented from mfem::SecondOrderODESolver.
void mfem::GeneralizedAlpha2Solver::PrintProperties  (  std::ostream &  out = mfem::out  ) 

overridevirtual 
Reimplemented from mfem::SecondOrderODESolver.

overridevirtual 
Perform a time step from time t [in] to time t [out] based on the requested step size dt [in].
[in,out]  x  Approximate solution. 
[in,out]  dxdt  Approximate rate. 
[in,out]  t  Time associated with the approximate solution x and rate @ dxdt 
[in,out]  dt  Time step size. 
The following rules describe the common behavior of the method:
Implements mfem::SecondOrderODESolver.