I have a model, where some of the loads are modelled to claddings, which then distribute it to bars. I'm interested in those distributed bar loads, that are either uniform or trapezoidal. I've created a small example model, with 2 bars and single cladding, where I've put 1kN/m2 load
After calculating the model, I can visually check the loads to see their assumed values from API
When I read loadrecords from cases that have this kind of loads that are distributed, sometimes the loads can't tell which part they are attached to. Below is the code that I've ran
// Get RSA data
IRobotApplication app = new RobotApplication();
IRobotProject project = app.Project;
IRobotStructure structure = project.Structure;
// Get wanted load case
IRobotSimpleCase c = structure.Cases.Get(2) as IRobotSimpleCase;
RobotLoadRecordMngr loadings = c.Records;
Debug.WriteLine($"Case {c.Name} with {loadings.Count} loads");
// Loop through all loadings
for (int j = 1; j <= loadings.Count; j++)
{
IRobotLoadRecord robotLoad = loadings.Get(j);
IRobotLoadRecordCommon commonLoad = robotLoad as IRobotLoadRecordCommon;
// Currently I'm only interested in the loads that have been determined by RSA from area loads
if(!commonLoad.IsAutoGenerated) continue;
RobotSelection objectSelection = robotLoad.Objects;
List<int> objects = new List<int>();
for (int k = 1; k <= objectSelection.Count; k++)
{
int no = objectSelection.Get(k);
objects.Add(no);
}
// Load has been distributed as uniform load
if(robotLoad.Type == IRobotLoadRecordType.I_LRT_BAR_UNIFORM)
{
Debug.WriteLine($"UniformLoad {j}, objects ({objects.Count}): {String.Join(" ", objects)}");
double Fx = robotLoad.GetValue((int)IRobotBarUniformRecordValues.I_BURV_PX);
double Fy = robotLoad.GetValue((int)IRobotBarUniformRecordValues.I_BURV_PY);
double Fz = robotLoad.GetValue((int)IRobotBarUniformRecordValues.I_BURV_PZ);
Debug.WriteLine($" FX = {Fx}");
Debug.WriteLine($" FY = {Fy}");
Debug.WriteLine($" FZ = {Fz}");
}
if (robotLoad.Type == IRobotLoadRecordType.I_LRT_BAR_TRAPEZOIDALE)
{
// Load needs to be casted, so all of the different points can be read
IRobotLoadRecordBarTrapezoidal castedLoad = robotLoad as IRobotLoadRecordBarTrapezoidal;
Debug.WriteLine($"TrapezoidalLoad {j}, {castedLoad.PointCount} points, objects ({objects.Count}): {String.Join(" ", objects)}");
for (int b = 1; b <= castedLoad.PointCount; b++)
{
double x = 0;
double y = 0;
double z = 0;
double xx = 0;
castedLoad.GetPoint(b, out x, out y, out z, out xx);
Debug.WriteLine($" Loc = {xx}, FX = {x}, FY = {y}, FZ = {z}");
}
}
}
The results are as below. Problem is, that the uniform part with 2.5kN/m value doesn't know which bars/elements it is attached to (or most likely it knows, but API can't read it). Is there any way to find out the bars or elements, where distributed loads are attached? The 'objectSelection' doesn't include any helpful information. Most likely the load is attached to a single element instead of a bar, as the type is uniform load instead of trapezoidal (it doesn't affect on full length of the bar)
TrapezoidalLoad 1, 21 points, objects (1): 1
Loc = 0, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,05, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,1, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,15, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,2, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,25, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,3, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,35, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,4, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,45, FX = 0, FY = 0, FZ = -2341,xxx-xxxxxxxx
Loc = 0,5, FX = 0, FY = 0, FZ = -4449,xxx-xxxxxxxx
Loc = 0,55, FX = 0, FY = 0, FZ = -4449,xxx-xxxxxxxx
Loc = 0,6, FX = 0, FY = 0, FZ = -3981,xxx-xxxxxxxx
Loc = 0,65, FX = 0, FY = 0, FZ = -3512,xxx-xxxxxxxx
Loc = 0,7, FX = 0, FY = 0, FZ = -3044,xxx-xxxxxxxx
Loc = 0,75, FX = 0, FY = 0, FZ = -2576,xxx-xxxxxxxx
Loc = 0,8, FX = 0, FY = 0, FZ = -2107,xxx-xxxxxxxx
Loc = 0,85, FX = 0, FY = 0, FZ = -1639,xxx-xxxxxxxx
Loc = 0,9, FX = 0, FY = 0, FZ = -1170,xxx-xxxxxxxx
Loc = 0,95, FX = 0, FY = 0, FZ = -702,576112412178
Loc = 1, FX = 0, FY = 0, FZ = -234,192037470726
UniformLoad 3, objects (0):
FX = 0
FY = 0
FZ = -2500
I'm testing this on RSA 2021 (34.0.0.7777 x64). I also tested the VBA script from link below, and results were similar: Some loads do not know the parts they are attached to.
https://forums.autodesk.com/t5/robot-structural-analysis-forum/api-cladding-and-panels-creation/td-p...
