Comments (3)
Hasanmz
commented on July 19, 2024
Hi,
I have faced the same problem. However, I check the code a bit more detail and I believe that that line of code should be changed to:
Call AddLoadCombo("Combo 1", Array("Case 1"), Array(1))
It will work then. Of course @JWock82 is to confirm that.
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JWock82
commented on July 19, 2024
@Hasanmz is correct. This has changed since I added the load combination feature, and I just haven't gotten around to updating the test routines yet. I recommend following the intellisense built into the methods themselves and looking at the arguments they require. The method AddLoadCombo takes a name, and an array of load case names (e.g. Array("D", "L", "S")) and an array of load factors corresponding to the load cases (e.g. Array(1.2, 1.6, 0.5)).
Here's what the first test routine would look like with the new changes:
'Finite Element Method, Problem 3.27
'This example tests the program's ability to correctly model 2D truss elements, sum forces at joints,
'report axial forces, and report deflections at nodes
'The test was successfully run on 8/16/2017
Private Sub FEM_Problem_3_27()
'Start a new finite element model
Dim myModel As New FEModel
'Define the nodes
Call myModel.AddNode("N1", 0, 0)
Call myModel.AddNode("N2", 60 * 12, 0)
Call myModel.AddNode("N3", 30 * 12, 40 * 12)
Call myModel.AddNode("N4", 30 * 12, 60 * 12)
'Define the members
Call myModel.AddMember("M1", "N1", "N3", 30000000, 10, 3)
Call myModel.AddMember("M2", "N2", "N3", 30000000, 10, 3)
Call myModel.AddMember("M3", "N3", "N4", 30000000, 10, 3)
'Define the supports
Call myModel.EditSupport("N1", True, True, True)
Call myModel.EditSupport("N2", True, True, True)
Call myModel.EditSupport("N4", True, True, True)
'Define the member end releases
Call myModel.EditEndReleases("M1", True, True)
Call myModel.EditEndReleases("M2", True, True)
Call myModel.EditEndReleases("M3", False, True)
'Define the joint loads
Call myModel.AddNodeLoad("N3", 5000, FX, "D")
Call myModel.AddNodeLoad("N3", -10000, FY, "D")
'Define a load combination (unfactored dead load in this case)
Call myModel.AddLoadCombo("Combo 1", Array("D"), Array(1))
'Clear 'Sheet1'
Sheet1.Cells.Clear
'Print the displacements at 'N3'
Sheet1.Range("A1") = "Node N3 Displacements"
Sheet1.Range("A2") = myModel.GetDisp("N3", DX, "Combo 1")
Sheet1.Range("A3") = myModel.GetDisp("N3", DY, "Combo 1")
Sheet1.Range("A4") = myModel.GetDisp("N3", RZ, "Combo 1")
'Show equilibrium at 'N3' - Reactions should equal 0 at 'N3')
Sheet1.Range("A6") = "Sum of Forces and Moments at N3"
Sheet1.Range("A7") = myModel.GetReaction("N3", FX)
Sheet1.Range("A8") = myModel.GetReaction("N3", FY)
Sheet1.Range("A9") = myModel.GetReaction("N3", MZ)
'Show the member axial forces
Sheet1.Range("E1") = "Member Axial Forces"
Sheet1.Range("E2") = myModel.GetMaxAxial("M1")
Sheet1.Range("F2") = myModel.GetMinAxial("M1")
Sheet1.Range("E3") = myModel.GetMaxAxial("M2")
Sheet1.Range("F3") = myModel.GetMinAxial("M2")
Sheet1.Range("E4") = myModel.GetMaxAxial("M3")
Sheet1.Range("F4") = myModel.GetMinAxial("M3")
End Sub
If anyone wants to update the documentation or the test routines I would love to have the help.
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JWock82
commented on July 19, 2024
I just updated the test routines.
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Related Issues (19)
- application of known displacements to nodes HOT 9
- not getting correct member moment diagram HOT 8
- Sign convention HOT 1
- Graphical User Interface
- GetMaxMemberDisp / GetMinMemberDisp functions HOT 1
- Functions to delete loads
- Member Code Checks
- Automatically segment physical members
- Invalid perameters HOT 1
- Problem in Test Example: Private Sub FEM_Problem_3_27() HOT 2
- LoadCombo.cls is being imported as a Module not a Class
- Member Internal Moment & Shear for Point Loads at Member Ends are Not Reported HOT 7
- Nice work! HOT 4
- Incorporate points associated with segment bounds into diagrams of shear, moment, etc. HOT 6
- Add support for load combinations HOT 2
- Add "Vertical" as a load direction HOT 1
- add spring supports HOT 1
- add module(s) of tools related to drawing diagrams of V(x), M(x), etc. HOT 2
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