The following is an example of a script for setting concentrated load conditions at nodes on a circle.

import math

# Radius for determining the selection target position

R = 28

# Radial width of the selected area (If set too narrow, nodes may not be selected.)

dR = 0.1

# Initial position angle of the target

Theta_start = 0

# Target's final position angle

Theta_end = 90

# Increment of Selection Angle

Theta_add = 15

# Selection width in the angular direction (If set too narrow, nodes may not be selected.)

dTheta = 0.1

app = designer.GetApplication()

# Switch to mesh display

app.View().ShowMesh()

# Switch to node selection mode

app.View().SelectElementVertex()

# Define a cylinder object to set the specified position of the select circle

cylinder = app.CreateCylinder()

# Set the coordinates of the center point

cylinder.SetCenterPoint(0, 0, 0)

# Set the components of the center axis

cylinder.SetCenterAxis(0, 0, 1)

# Set the direction component of the X-axis

cylinder.SetXAxis(1, 0, 0)

# Set the inner radius of the selected area

cylinder.SetInnerRadius(R - dR/2)

# Set the radius outside the selection area

cylinder.SetOuterRadius(R + dR/2)

# Set whether to specify the height of the selection range

cylinder.SetUseHeight(False) 

# Set whether to specify the angle of the selection range

cylinder.SetUseAngle(True)

# Loop within the specified angle range

for theta in range(int(Theta_start), int(Theta_end) + 1, int(Theta_add)):

   # Specify the starting angle of the selected range

   cylinder.SetStartAngle(theta - dTheta/2)

   # Specify the ending angle of the selected range

   cylinder.SetEndAngle(theta + dTheta/2)

   # Create a node group (group name should be a string indicating the angle)

   objNodeGroup = app.GetCurrentStudy().GetMeshGroupList().CreateNodeGroup(f"{theta}deg")

   # Remove selection from node group

   objNodeGroup.ClearParts()

   # Retrieve information about nodes within a node group

   sel = objNodeGroup.GetSelection()

   # Deselect

   sel.Clear()

   # Select nodes within the range specified by the cylinder object

   sel.SelectNodeByCylinderObject(cylinder, 1)

   # Add selected node to group

   objNodeGroup.AddSelected(sel)

   # Create a concentrated load condition (name the condition with a string indicating the angle)

   objCond = app.GetCurrentStudy().CreateCondition("ConcentratedLoad", f"{theta}deg")

   # Set the load

   objCond.SetValue(u"Load", 1)

   # Convert angles from degrees to radians and calculate cosine and sine

   direction_x = math.cos(math.radians(theta))

   direction_y = math.sin(math.radians(theta))

   # Set the load direction along the circumference

   objCond.SetXYZPoint(u"Direction", direction_x, direction_y, 0)

   # Clear the target to which the condition is applied

   objCond.ClearParts()

   # Add node group to target

   objCond.AddGroup(objNodeGroup, 0)

# Deselect

sel.Clear()