【讨论】我不懂这个命令的意思

nrs3000

        在j-积分计算的命令流中有
        ppath,1,arg1
        ppath,2,arg2
        ppath,3,arg3
        ppath,4,arg4
        四条命令,我不懂其中的arg1,2,3,4分别代表什么?
         请指教,谢谢!

femman

See bottom a copy of manual,describing the command
those 4 points were defined by four nodes, whose coordinates are in the arg1,arg2, arg3, arg4 defined before...
  
good luck...
  
======================
PPATH, POINT, NODE, X, Y, Z, CS: Defines a path by picking or defining nodes, or locations on the currently active working plane, or by entering specific coordinate locations.
  
POST1ath Operations
  
POINT
The point number. It must be greater than zero and less than or equal to the nPts value specified on the PATH command if graphical picking is not being used.
  
NODE
The node number defining this point. If blank, use the X, Y, Z coordinates to define the point. A valid node number will override X, Y, Z coordinate arguments.
  
PICK --  
Pick the node.
  
(blank) --  
Use the X, Y, Z coordinates to define the point.
  
X, Y, Z
X, Y, Z arguments specify the location of the point in the global Cartesian coordinate system. Use this argument only if you omit the NODE argument.
  
PICK --  
Pick the point.
  
CS
The coordinate system for interpolation of the path between the previous point and this point. Omit this argument if you wish to use the currently active (CSYS) coordinate system. If the coordinate system of two adjacent points is different, the CS value of the latter point will be used.
  
Notes
For linearized stress calculations, the path must be defined with nodes.
  
For information on displaying paths you have defined, see Defining Data to be Retrieved in the ANSYS Basic Analysis Guide.
  
Menu Paths
See PPATH Menu Paths in the ANSYS Command Menu Path Listings.
16.108. PPATH Menu Paths
Main Menu>General Postproc&gtath Operations>Define Path>By Location  
Main Menu>General Postproc>Path Operations>Define Path>By Nodes  
Main Menu>General Postproc>Path Operations>Define Path>Modify Path  
Main Menu>General Postproc>Path Operations>Define Path>On Working Plane  
Main Menu>Preprocessor>Path Operations>Define Path>By Location  
Main Menu>Preprocessor>Path Operations>Define Path>By Nodes  
Main Menu>Preprocessor>Path Operations>Define Path>Modify Path  
Main Menu>Preprocessor>Path Operations>Define Path>On Working Plane

nrs3000

         非常感谢!