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InitialInterpolatedLineSearch.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: 1.3 $
00022 // $Date: 2003/02/14 23:00:42 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/analysis/algorithm/equiSolnAlgo/InitialInterpolatedLineSearch.h,v $
00024 
00025 // Written: fmk 
00026 // Created: 11/01
00027 
00028 // Description: This file contains the class definition for LinearInterpolatedSearch.
00029 // This performs the search by using a form of linear interpolation to find the best solution.
00030 // Solution procedure follows the one in Crissfields book.
00031 // (M.A. Crissfield, Nonlinear Finite Element Analysis of Solid and Structures, Wiley. 97).
00032 // NOTE: it is not quite linear interpolation/false-position/regula-falsi as eta(0) = 0.0
00033 // does not change. uses eta(i) = eta(i-1)*s0
00034 //                                -----------
00035 //                                s0 - s(i-1)  to compute eta(i)
00036 //
00037 
00038 #ifndef InitialInterpolatedLineSearch_h
00039 #define InitialInterpolatedLineSearch_h
00040 
00041 #include <LineSearch.h>
00042 class Vector;
00043 //class OPS_Stream; //Jeremic@ucdavis.edu taken out since there is an include<iOPS_Stream.h> in LineSearch.h 
00044 
00045 class InitialInterpolatedLineSearch: public LineSearch
00046 {
00047   public:
00048   InitialInterpolatedLineSearch(double tolerance = 0.8, 
00049                                 int    maxIter   = 10,
00050                                 double minEta    = 0.1,
00051                                 double maxEta    = 10.0, 
00052                                 int    printFlag = 1);
00053 
00054     ~InitialInterpolatedLineSearch();
00055 
00056     int newStep(LinearSOE &theSOE);
00057     int search(double s0, 
00058                double s1, 
00059                LinearSOE &theSOE, 
00060                IncrementalIntegrator &theIntegrator);
00061 
00062     int sendSelf(int commitTag, Channel &theChannel);
00063     int recvSelf(int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker);
00064     void Print(OPS_Stream &s, int flag =0) ;    
00065     
00066   protected:
00067     
00068   private:
00069     Vector *x;
00070     double tolerance;
00071     int    maxIter;
00072     double minEta;
00073     double maxEta;
00074     int    printFlag;
00075 };
00076 
00077 #endif
00078 
00079

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