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LagrangeSP_FE.h

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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: 1.4 $
00022 // $Date: 2006/02/08 20:20:00 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/analysis/fe_ele/lagrange/LagrangeSP_FE.h,v $
00024                                                                         
00025                                                                         
00026 #ifndef LagrangeSP_FE_h
00027 #define LagrangeSP_FE_h
00028 
00029 // Written: fmk 
00030 // Created: 02/99
00031 // Revision: A
00032 //
00033 // Description: This file contains the class definition for LagrangeSP_FE.
00034 // LagrangeSP_FE is a subclass of FE_Element which handles SP_Constraints
00035 // using the Lagrange method.
00036 //
00037 // What: "@(#) LagrangeSP_FE.h, revA"
00038 
00039 #include <FE_Element.h>
00040 #include <ID.h>
00041 #include <Matrix.h>
00042 #include <Vector.h>
00043 
00044 class Element;
00045 class Integrator;
00046 class AnalysisModel;
00047 class Domain;
00048 class SP_Constraint;
00049 class Node;
00050 class DOF_Group;
00051 
00052 class LagrangeSP_FE: public FE_Element
00053 {
00054   public:
00055     LagrangeSP_FE(int tag, Domain &theDomain, SP_Constraint &theSP, 
00056                   DOF_Group &theDofGrp, double alpha = 1.0);
00057     virtual ~LagrangeSP_FE();    
00058 
00059     // public methods
00060     virtual int  setID(void);
00061     virtual const Matrix &getTangent(Integrator *theIntegrator);    
00062     virtual const Vector &getResidual(Integrator *theIntegrator);    
00063     virtual const Vector &getTangForce(const Vector &x, double fact = 1.0);
00064 
00065     virtual const Vector &getK_Force(const Vector &x, double fact = 1.0);
00066     virtual const Vector &getKi_Force(const Vector &x, double fact = 1.0);
00067     virtual const Vector &getC_Force(const Vector &x, double fact = 1.0);
00068     virtual const Vector &getM_Force(const Vector &x, double fact = 1.0);        
00069   protected:
00070     
00071   private:
00072     double alpha;
00073     Matrix *tang;
00074     Vector *resid;
00075     
00076     SP_Constraint *theSP;
00077     Node *theNode;    
00078 
00079     DOF_Group *theDofGroup;
00080 };
00081 
00082 #endif
00083 
00084

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