xc
CentralDifferenceNoDamping.h
1 // -*-c++-*-
2 //----------------------------------------------------------------------------
3 // XC program; finite element analysis code
4 // for structural analysis and design.
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6 // Copyright (C) Luis C. Pérez Tato
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9 // developed by the «Pacific earthquake engineering research center».
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28 /* ****************************************************************** **
29 ** OpenSees - Open System for Earthquake Engineering Simulation **
30 ** Pacific Earthquake Engineering Research Center **
31 ** **
32 ** **
33 ** (C) Copyright 1999, The Regents of the University of California **
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41 ** Developed by: **
42 ** Frank McKenna (fmckenna@ce.berkeley.edu) **
43 ** Gregory L. Fenves (fenves@ce.berkeley.edu) **
44 ** Filip C. Filippou (filippou@ce.berkeley.edu) **
45 ** **
46 ** ****************************************************************** */
47 
48 // $Revision: 1.1 $
49 // $Date: 2005/02/22 22:21:10 $
50 // $Source: /usr/local/cvs/OpenSees/SRC/analysis/integrator/CentralDifferenceNoDamping.h,v $
51 
52 #ifndef CentralDifferenceNoDamping_h
53 #define CentralDifferenceNoDamping_h
54 
55 // Written: fmk
56 // Created: 02/05
57 // Revision: A
58 //
59 // Description: This file contains the class definition for CentralDifferenceNoDamping.
60 // CentralDifferenceNoDamping is an algorithmic class for performing a transient
61 // analysis using the Central Difference Scheme as implemented in Dyna
62 // An = M(-1) (Pn - Fn)
63 // Vn+1/2 = Vn-1/2 + dT * An
64 // Dn+1 = Dn + deltaT * Vn+1/2
65 // which is an explicit direct integration scheme as outlined in the paper:
66 // Goudreau, G.L. and J.O. Hallquist, "Recent Developments in Large Scale Finite Element Lagrangian
67 // Hydrocode Technology", Journal of Computer Methods in Applied Mechanics and Engineering, 30, 1982.
68 //
69 // What: "@(#) CentralDifferenceNoDamping.h, revA"
70 
71 #include <solution/analysis/integrator/transient/CentralDifferenceBase.h>
72 #include "solution/analysis/integrator/transient/ResponseQuantities.h"
73 
74 namespace XC {
75 
77 //
82  {
83  private:
85 
86  friend class SolutionStrategy;
87  friend class FEM_ObjectBroker;
89  Integrator *getCopy(void) const;
90  public:
91 
92  // methods which define what the FE_Element and DOF_Groups add
93  // to the system of equation object.
94  int formEleResidual(FE_Element *theEle);
95  int formNodUnbalance(DOF_Group *theDof);
96 
97  int domainChanged(void);
98  int update(const Vector &deltaU);
99 
100  int commit(void);
101 
102  virtual int sendSelf(Communicator &);
103  virtual int recvSelf(const Communicator &);
104  };
105 inline Integrator *CentralDifferenceNoDamping::getCopy(void) const
106  { return new CentralDifferenceNoDamping(*this); }
107 } // end of XC namespace
108 
109 #endif
110 
Float vector abstraction.
Definition: Vector.h:94
Communication parameters between processes.
Definition: Communicator.h:66
FEM_ObjectBroker is is an object broker class for the finite element method.
Definition: FEM_ObjectBroker.h:151
Approximates velocity and acceleration by centered finite differences of displacement.
Definition: CentralDifferenceBase.h:45
Base class for the objects that performs the integration of physical properties over the domain to fo...
Definition: Integrator.h:100
A DOF_Group object is instantiated by the ConstraintHandler for every unconstrained node in the domai...
Definition: DOF_Group.h:107
Solution strategy for the finite element problem.
Definition: SolutionStrategy.h:94
Finite element as seen by analysis.
Definition: FE_Element.h:108
CentralDifferenceNoDamping is an algorithmic class for performing a transient analysis using the Cent...
Definition: CentralDifferenceNoDamping.h:81
Open source finite element program for structural analysis.
Definition: ContinuaReprComponent.h:35
Response quantities.
Definition: ResponseQuantities.h:42