J:/Tecgraf/prj/femoop/trunk/path/arclen.h

// -------------------------------------------------------------------------
// arclen.h - This header file contains the definitions of the classes
//            required to trace the equilibrium path using the Arc-Length 
//            Method.
// -------------------------------------------------------------------------
//
// $Author: evandro $
// $Revision: 1.3 $
// $Date: 1999/04/12 14:57:37 $
// $State: Exp $
//
// -------------------------------------------------------------------------
//

#ifndef _ARCLEN_H
#define _ARCLEN_H

#include "path.h"

// -------------------------------------------------------------------------
// Arc-length base class:
//
class cArcLength: public cPath
{
 protected:
  static double  _LoadCoeff;  // Coeff. of load terms (spherical arc-length)
         double  _ArcLen;     // Current arc length
         double  _Dlf;        // Step load increment

 public:
  static  void    ReadParam (void);
                  cArcLength(void);
  virtual        ~cArcLength(void) { }

 protected:
  virtual void    SetArcLength   (cVector &);
  virtual double  FirstIncLoadFac(cVector &, cVector &);
};


// -------------------------------------------------------------------------
// Initial Orthogonal (Riks) arc-length class:
//
class cIniOrtArcLength: public cArcLength
{ 
 public:
          cIniOrtArcLength(void);
         ~cIniOrtArcLength(void){ };
  double  IncLoadFac      (cVector &, cVector &, cVector &);
};


// -------------------------------------------------------------------------
// Updated Orthogonal (Ramm) arc-length class:
//
class cUpOrtArcLength: public cArcLength
{ 
 public:
          cUpOrtArcLength(void);
         ~cUpOrtArcLength(void){ };
  double  IncLoadFac     (cVector &, cVector &, cVector &);
};


// -------------------------------------------------------------------------
// Consistent linearized arc-length class:
//
class cConLinArcLength: public cArcLength
{ 
 public:
          cConLinArcLength(void);
         ~cConLinArcLength(void){ };
  double  IncLoadFac      (cVector &, cVector &, cVector &);
};


// -------------------------------------------------------------------------
// Cilindrical (Quadratic) arc-length class:
//
class cCilArcLength: public cArcLength
{ 
 public:
          cCilArcLength(void);
         ~cCilArcLength(void){ };
  double  IncLoadFac   (cVector &, cVector &, cVector &);
};



#endif
 

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