檢視 $stresssurface 的原始碼

$stresssurface  is the command to put pressure force in the surface element. The format is 

 $stresssurface
 Num_surfaceNo
 SurfaceNo_1  Px Py Pz 
 SurfaceNo_2  Px Py Pz 
 SurfaceNo_3  Px Py Pz 
 ....
 SurfaceNo_N  Px Py Pz 


For example 
 $stresssurface
 3
 103  1.0e-2  0.0 0.0 
 201  0.0   1.0e-2  0.0
 432  1.0e-2  0.0 1.0e-2