DistributedDisplacementControl.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: 2005/11/29 21:59:49 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/analysis/integrator/DistributedDisplacementControl.h,v $ 00024 00025 // Written: fmk 00026 // Created: 07/98 00027 // Revision: A 00028 // 00029 // Description: This file contains the class definition for DistributedDisplacementControl. 00030 // DistributedDisplacementControl is an algorithmic class for perfroming a static analysis 00031 // using the arc length scheme, that is within a load step the follwing 00032 // constraint is enforced: 00033 // i=1 delta U^T delta U + alpha^2 delta lambda^2 = delta s^2 00034 // i>1 dU^T delta U + alpha^2 dLambda delta lambda = 0 00035 // where dU is change in nodal displacements for step, dLambda is 00036 // change in applied load and DistributedDisplacementControl is a control parameter. 00037 // 00038 // What: "@(#) DistributedDisplacementControl.h, revA" 00039 00040 #ifndef DistributedDisplacementControl_h 00041 #define DistributedDisplacementControl_h 00042 00043 #include <StaticIntegrator.h> 00044 00045 class LinearSOE; 00046 class AnalysisModel; 00047 class FE_Element; 00048 class Vector; 00049 class Domain; 00050 00051 class DistributedDisplacementControl : public StaticIntegrator 00052 { 00053 public: 00054 DistributedDisplacementControl(int node, int dof, double increment, 00055 int numIncrStep, double minIncrement, double maxIncrement); 00056 DistributedDisplacementControl(); 00057 00058 ~DistributedDisplacementControl(); 00059 00060 int newStep(void); 00061 int update(const Vector &deltaU); 00062 int domainChanged(void); 00063 00064 int sendSelf(int commitTag, Channel &theChannel); 00065 int recvSelf(int commitTag, Channel &theChannel, 00066 FEM_ObjectBroker &theBroker); 00067 00068 void Print(OPS_Stream &s, int flag =0); 00069 00070 protected: 00071 00072 private: 00073 int processID; // processID 00074 Channel **theChannels; // Channel array 00075 int numChannels; // numChannels in theChannel array 00076 00077 int theNode; // the node that is being followed 00078 int theDof; // the dof at the node being followed 00079 double theIncrement; // deltaU at step (i) 00080 int theDofID; // the syste level id of the dof being followed 00081 bool allHaveDofID; 00082 00083 Vector *deltaUhat, *deltaUbar, *deltaU, *deltaUstep; 00084 Vector *phat; // the reference load vector 00085 double deltaLambdaStep, currentLambda; // dLambda(i) & current value of lambda 00086 00087 double specNumIncrStep, numIncrLastStep; // Jd & J(i-1) 00088 double minIncrement, maxIncrement; // min/max values of deltaU at (i) 00089 }; 00090 00091 #endif 00092
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