topic Re: ROBOT API - Three and four point trapezoidal loads in Robot Structural Analysis Forum

ROBOT API - Three and four point trapezoidal loads

a.gonzalezY3KSY — Mon, 10 Jan 2022 07:34:20 GMT

Hello,

I am Alejandro, a structural analyst of lightweight façade structures. A few weeks ago I started to use the Robot API to automate the creation of simple models.

I have problems when creating a trapezoidal load defined by more than two points (three or four). I write the code I am using:

Dim CaseWind As RobotSimpleCase
Set CaseWind = s.Cases.CreateSimple(3, "WIND_LOAD1", I_CN_WIND, I_CAT_STATIC_LINEAR)
Uniform = CaseWind.Records.New(I_LLT_BEAM_LOAD_TRAPEZOIDAL3)

Set LoadRecord = CaseWind.Records.Get(Uniform)

LoadRecord.SetValue I_BTRV_PX1, 0
LoadRecord.SetValue I_BTRV_PX2, 0
LoadRecord.SetValue I_BTRV_PX3, 0

LoadRecord.SetValue I_BTRV_PY1, 0
LoadRecord.SetValue I_BTRV_PY2, 1000
LoadRecord.SetValue I_BTRV_PY3, 0

LoadRecord.SetValue I_BTRV_PZ1, 0
LoadRecord.SetValue I_BTRV_PZ2, 0
LoadRecord.SetValue I_BTRV_PZ3, 0

LoadRecord.SetValue I_BTRV_X1, 0
LoadRecord.SetValue I_BTRV_X2, (longitudTrav - A)
LoadRecord.SetValue I_BTRV_X3, A

I have read the API documentation but have not been able to find the answer.

Thank you very much in advance.

Re: ROBOT API - Three and four point trapezoidal loads

Stephane.kapetanovic — Mon, 10 Jan 2022 11:43:18 GMT

hi @a.gonzalezY3KSY

I_LLT_BEAM_LOAD_TRAPEZOIDAL3 doesn't exist in IRobotLoadRecordType

I_BTRV_PZ3 and I_BTRV_X3 doesn't exist in IRobotBarTrapezoidaleRecordValues

Best regards

Re: ROBOT API - Three and four point trapezoidal loads

Stephane.kapetanovic — Mon, 10 Jan 2022 12:25:59 GMT

hi @a.gonzalezY3KSY

here after sample code for a trapezoidal load with 3pts

Sub Add_New_BarTrapezoidal_3Pts() Dim Robapp As RobotApplication Dim CaseWind As RobotSimpleCase Dim NewRecord As RobotLoadRecordBarTrapezoidal Dim A As Double, B As Double Set Robapp = New RobotApplication Set CaseWind = Robapp.Project.Structure.Cases.CreateSimple(3, "WIND_LOAD1", I_CN_WIND, I_CAT_STATIC_LINEAR) A = 0.25: B = 0.5 Set NewRecord = CaseWind.Records.Create(I_LRT_BAR_TRAPEZOIDALE) NewRecord.PointCount = 3 With NewRecord .Objects.FromText "1" .PointCount = 3 .SetPoint 1, 0, 0, 500, A .SetPoint 2, 0, 0, 1000, B .SetPoint 3, 0, 0, 500, 1 - A .SetValue I_BTRV_RELATIVE, True End With Robapp.Project.ViewMngr.Refresh Set Robapp = Nothing End Sub

Best regards

Re: ROBOT API - Three and four point trapezoidal loads

Stephane.kapetanovic — Mon, 10 Jan 2022 12:29:01 GMT

in addition

https://forums.autodesk.com/t5/robot-structural-analysis-forum/api-add-loads-to-a-bar/m-p/7855485

Re: ROBOT API - Three and four point trapezoidal loads

a.gonzalezY3KSY — Tue, 11 Jan 2022 13:24:07 GMT

Thank you very much for your answers Stephane. I was used to using robot manually with the 4 point trapezoidal loading option. I had not thought of generating several individual 2-point ones.

I will bother you soon with more problems 😅

Best regards