HHTGeneralized.hGo to the documentation of this file.00001 /* ****************************************************************** ** 00002 ** OpenSees - Open System for Earthquake Engineering Simulation ** 00003 ** Pacific Earthquake Engineering Research Center ** 00004 ** ** 00005 ** ** 00006 ** (C) Copyright 1999, The Regents of the University of California ** 00007 ** All Rights Reserved. ** 00008 ** ** 00009 ** Commercial use of this program without express permission of the ** 00010 ** University of California, Berkeley, is strictly prohibited. See ** 00011 ** file 'COPYRIGHT' in main directory for information on usage and ** 00012 ** redistribution, and for a DISCLAIMER OF ALL WARRANTIES. ** 00013 ** ** 00014 ** Developed by: ** 00015 ** Frank McKenna (fmckenna@ce.berkeley.edu) ** 00016 ** Gregory L. Fenves (fenves@ce.berkeley.edu) ** 00017 ** Filip C. Filippou (filippou@ce.berkeley.edu) ** 00018 ** ** 00019 ** ****************************************************************** */ 00020 00021 // $Revision: 1.1 $ 00022 // $Date: 2005/12/19 22:39:21 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/analysis/integrator/HHTGeneralized.h,v $ 00024 00025 #ifndef HHTGeneralized_h 00026 #define HHTGeneralized_h 00027 00028 // Written: Andreas Schellenberg (andreas.schellenberg@gmx.net) 00029 // Created: 10/05 00030 // Revision: A 00031 // 00032 // Description: This file contains the class definition for HHTGeneralized. 00033 // HHTGeneralized is an algorithmic class for performing a transient analysis 00034 // using the HHTGeneralized integration scheme. 00035 // 00036 // What: "@(#) HHTGeneralized.h, revA" 00037 00038 #include <TransientIntegrator.h> 00039 00040 class DOF_Group; 00041 class FE_Element; 00042 class Vector; 00043 00044 class HHTGeneralized : public TransientIntegrator 00045 { 00046 public: 00047 // constructors 00048 HHTGeneralized(); 00049 HHTGeneralized(double rhoInf); 00050 HHTGeneralized(double rhoInf, 00051 double alphaM, double betaK, double betaKi, double betaKc); 00052 HHTGeneralized(double alphaI, double alphaF, double beta, double gamma); 00053 HHTGeneralized(double alphaI, double alphaF, double beta, double gamma, 00054 double alphaM, double betaK, double betaKi, double betaKc); 00055 00056 // destructor 00057 ~HHTGeneralized(); 00058 00059 // methods which define what the FE_Element and DOF_Groups add 00060 // to the system of equation object. 00061 int formEleTangent(FE_Element *theEle); 00062 int formNodTangent(DOF_Group *theDof); 00063 00064 int domainChanged(void); 00065 int newStep(double deltaT); 00066 int revertToLastStep(void); 00067 int update(const Vector &deltaU); 00068 int commit(void); 00069 00070 virtual int sendSelf(int commitTag, Channel &theChannel); 00071 virtual int recvSelf(int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker); 00072 00073 void Print(OPS_Stream &s, int flag = 0); 00074 00075 protected: 00076 00077 private: 00078 double alphaI; 00079 double alphaF; 00080 double beta; 00081 double gamma; 00082 double deltaT; 00083 00084 // rayleigh damping factors 00085 double alphaM; 00086 double betaK; 00087 double betaKi; 00088 double betaKc; 00089 00090 double c1, c2, c3; // some constants we need to keep 00091 Vector *Ut, *Utdot, *Utdotdot; // response quantities at time t 00092 Vector *U, *Udot, *Udotdot; // response quantities at time t + deltaT 00093 Vector *Ualpha, *Ualphadot, *Ualphadotdot; // response quantities at time t+alpha*deltaT 00094 }; 00095 00096 #endif
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