NewmarkHybridSimulation.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/NewmarkHybridSimulation.h,v $ 00024 00025 #ifndef NewmarkHybridSimulation_h 00026 #define NewmarkHybridSimulation_h 00027 00028 // Written: Andreas Schellenberg (andreas.schellenberg@gmx.net) 00029 // Created: 09/05 00030 // Revision: A 00031 // 00032 // Description: This file contains the class definition for NewmarkHybridSimulation. 00033 // NewmarkHybridSimulation is an algorithmic class for performing a transient analysis 00034 // using the Newmark integration scheme. 00035 // 00036 // What: "@(#) NewmarkHybridSimulation.h, revA" 00037 00038 #include <TransientIntegrator.h> 00039 00040 class DOF_Group; 00041 class FE_Element; 00042 class Vector; 00043 class ConvergenceTest; 00044 00045 class NewmarkHybridSimulation : public TransientIntegrator 00046 { 00047 public: 00048 // constructors 00049 NewmarkHybridSimulation(); 00050 NewmarkHybridSimulation(double gamma, double beta, ConvergenceTest &theTest); 00051 NewmarkHybridSimulation(double gamma, double beta, ConvergenceTest &theTest, 00052 double alphaM, double betaK, double betaKi, double betaKc); 00053 00054 // destructor 00055 ~NewmarkHybridSimulation(); 00056 00057 // methods which define what the FE_Element and DOF_Groups add 00058 // to the system of equation object. 00059 int formEleTangent(FE_Element *theEle); 00060 int formNodTangent(DOF_Group *theDof); 00061 00062 int domainChanged(void); 00063 int newStep(double deltaT); 00064 int revertToLastStep(void); 00065 int update(const Vector &deltaU); 00066 00067 virtual int sendSelf(int commitTag, Channel &theChannel); 00068 virtual int recvSelf(int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker); 00069 00070 void Print(OPS_Stream &s, int flag = 0); 00071 00072 protected: 00073 00074 private: 00075 double gamma; 00076 double beta; 00077 00078 // rayleigh damping factors 00079 double alphaM; 00080 double betaK; 00081 double betaKi; 00082 double betaKc; 00083 00084 ConvergenceTest *theTest; // convergence test 00085 double rFact; // displacement increment reduction factor 00086 double c1, c2, c3; // some constants we need to keep 00087 Vector *Ut, *Utdot, *Utdotdot; // response quantities at time t 00088 Vector *U, *Udot, *Udotdot; // response quantities at time t+deltaT 00089 }; 00090 00091 #endif
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