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$$$$ CHTGAU   NOTICE  CHAT      11/09/12    21:15:25     7124           
                                             DATE     11/09/12

  Procedure CHTGAU                             Voir aussi :
    ----------------   
    CHPO1 = CHTGAU TAB1 ;

                TAB1.'PUISSANCE' .'RENDEMENT'
                    .'DIFFUSVITE'  .'CONDUCTIVITE'
                    .'VITESSE'
                    .'T0'
                    .'NTERMES'
                    .'MAILLAGE'
                    .'EPAISSEUR'
                    .'LOCAL' .'INSTANT'
                    .'GAUSS' .'ECART-TYPE'


    Description :
    _____________

    This procedure calculates the temperature field created by the
    displacement of a welding arc on an inifinite plate. The arc is
    ponctual and is moved along the X axis.
    The analytical solution of the problem is given in Rosenthal : 
    Mathematical Theory of Heat Distribution During Welding and 
    Cutting.

    Contents :
    _________

    Input data :
    __________

        TAB1 : TABLE object, indexed by words, used to define the
                calculation options and parameters :

        Arguments :
        ___________

            'PUISSANCE' : REEL : Electrical power of the arc (in W)    

            'RENDEMENT' : REEL : Arc yield : ratio between the power
               received by the plate and the electrical power of the 
               arc

            'DIFFUSVITE' : REEL : Thermal diffusivity (in m^2/s)

            'CONDUCTIVITE' : REEL : Thermal Conductivity (in W/Km2)

            'VITESSE' : REEL : Speed of welding (in m/s)

            'T0' : REEL : Ambiant temperature (in °C or in K)    

            'NTERMES' : ENTIER : Number of terms in the analytical
               solution     

            'MAILLAGE' : MAILLAGE : Mesh of the plate 

            'EPAISSEUR' : REEL : Plate thickness (in m)     

            'LOCAL' : BOOLEEN : VRAI (true) if the plate is in a local
               coordinate system (the arc is at (0. 0. 0.))

            'INSTANT' : REEL : If 'LOCAL' is FAUX (false), moment
               which the temperature field has to be computed (the
               abscissa of the arc is then V*t) (in s)

            'GAUSS' : BOOLEEN : VRAI (true) if the heat source is
               gaussian

            'ECART-TYPE' : REEL : Standart deviation of the gaussian
               (in m)

    Output data :
    _____________

            CHPO1 : CHPOINT : Temperature field (in °C or in K)