我做的直到宏没有做任何事情

我正在创建一个迭代循环来解决Darcy-Weisbach闭合管道环路。有4个循环。我试图重复所有4个循环的迭代，直到水头损失低于某个值（0.0001）。我录制了一个宏，然后尝试修改它以获得低于0.0001的迭代次数。这个宏基本上是从之前的迭代中拉取值并循环，并将它们放入新的迭代中。我真的很新vba，我不确定问题在这里，但是宏根本不会运行。它没有说有任何错误，它只是没有做任何事情。也许有人知道问题是什么？我做的直到宏没有做任何事情

Sub Iterate() 
' 
' Iterate Macro 
' 
' 
Dim RowStart As Long 
Dim HeadLoss As Long 
Dim Count As Long 
    RowStart = 19 
    HeadLoss = 0 
    Count = 2 
Do Until HeadLoss <= 0.0001 
' Copy Previous Iteration 
    Range(Cells(RowStart, 1), Cells(RowStart + 32, 7)).Select 
    Selection.Copy 
    Range(Cells(RowStart + 34, 1)).Select 
    ActiveSheet.Paste 
    Range(Cells(RowStart + 34, 1)).Select 
    Application.CutCopyMode = False 
    ActiveCell.FormulaR1C1 = "Iteration" & Count 
' Loop 1 
    Range(Cells(RowStart + 37, 2)).Select 
    ActiveCell.FormulaR1C1 = "=R[-34]C[5]" 
    Range(Cells(RowStart + 38, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-18]C[5]" 
    Range(Cells(RowStart + 39, 2)).Select 
    ActiveCell.FormulaR1C1 = "=R[-34]C[5]" 
    Range(Cells(RowStart + 40, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-29]C[5]" 
    Range(Cells(RowStart + 37, 7)).Select 
    ActiveCell.FormulaR1C1 = "=RC[-5]-R61C5" 
    Range(Cells(RowStart + 37, 7)).Select 
    Selection.AutoFill Destination:=Range(Cells(RowStart + 37, 7), 
     Cells(RowStart + 40, 7)), Type:=xlFillDefault 
' Loop 2 
    Range(Cells(RowStart + 45, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-5]C[5]" 
    Range(Cells(RowStart + 46, 2)).Select 
    ActiveCell.FormulaR1C1 = "=R[-34]C[5]" 
    Range(Cells(RowStart + 47, 2)).Select 
    ActiveCell.FormulaR1C1 = "=R[-34]C[5]" 
    Range(Cells(RowStart + 48, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-18]C[5]" 
    Range(Cells(RowStart + 45, 7)).Select 
    ActiveCell.FormulaR1C1 = "=RC[-5]-R69C5" 
    Range(Cells(RowStart + 45, 7)).Select 
    Selection.AutoFill Destination:=Range(Cells(RowStart + 45, 7), 
     Cells(RowStart + 48, 7)), Type:=xlFillDefault 
' Loop 3 
    Range(Cells(RowStart + 53, 2)).Select 
    ActiveCell.FormulaR1C1 = "=R[-34]C[5]" 
    Range(Cells(RowStart + 54, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-50]C[5]" 
    Range(Cells(RowStart + 55, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-16]C[5]" 
    Range(Cells(RowStart + 56, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-29]C[5]" 
    Range(Cells(RowStart + 53, 7)).Select 
    ActiveCell.FormulaR1C1 = "=RC[-5]-R77C5" 
    Range(Cells(RowStart + 53, 7)).Select 
    Selection.AutoFill Destination:=Range(Cells(RowStart + 53, 7), 
     Cells(RowStart + 56, 7)), Type:=xlFillDefault 
' Loop 4 
    Range(Cells(RowStart + 61, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-5]C[5]" 
    Range(Cells(RowStart + 62, 2)).Select 
    ActiveCell.FormulaR1C1 = "=R[-34]C[5]" 
    Range(Cells(RowStart + 63, 2)).Select 
    ActiveCell.FormulaR1C1 = "=R[-34]C[5]" 
    Range(Cells(RowStart + 64, 2)).Select 
    ActiveCell.FormulaR1C1 = "=-R[-16]C[5]" 
    Range(Cells(RowStart + 61, 7)).Select 
    ActiveCell.FormulaR1C1 = "=RC[-5]-R84C5" 
    Range(Cells(RowStart + 61, 7)).Select 
    Selection.AutoFill Destination:=Range(Cells(RowStart + 61, 7), 
     Cells(RowStart + 64, 7)), Type:=xlFillDefault 

    HeadLoss = Cells(RowStart + 41, 5).Value + Cells(RowStart + 49, 5).Value + 
     Cells(RowStart + 57, 5).Value + Cells(RowStart + 65, 5).Value 
    RowStart = RowStart + 34 
    Count = Count + 1 
Loop 

End Sub

感谢您的帮助球员，我肯定越来越近。我仍然有一个问题。我希望宏循环直到HeadLoss小于0.0001。目前迭代只运行一次，HeadLoss约为0.2058，明显大于0.0001。为什么只有一次迭代后停止？

Sub Iterate() 
' 
' Iterate Macro 
' 

' 
Dim RowStart As Long 
Dim HeadLoss As Long 
Dim Count As Long 
    RowStart = 19 
    HeadLoss = 1 
    Count = 2 
Do While HeadLoss >= 0.0001 
' Copy Previous Iteration 
    With ActiveSheet 
    Range(.Cells(RowStart, 1), .Cells((RowStart + 32), 7)).Copy 
      .Cells(RowStart + 34, 1) 
    .Cells(RowStart + 34, 1).Select 
    Application.CutCopyMode = False 
    ActiveCell.FormulaR1C1 = "Iteration" & Count 
' Loop 1 
    .Cells(RowStart + 37, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 38, 2).FormulaR1C1 = "=-R[-18]C[5]" 
    .Cells(RowStart + 39, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 40, 2).FormulaR1C1 = "=-R[-29]C[5]" 
    .Cells(RowStart + 37, 7).FormulaR1C1 = "=RC[-5]-R61C5" 
    .Cells(RowStart + 37, 7).AutoFill Destination:=Range(Cells(RowStart + 37, 7), 
     Cells(RowStart + 40, 7)), Type:=xlFillDefault 
' Loop 2 
    .Cells(RowStart + 45, 2).FormulaR1C1 = "=-R[-5]C[5]" 
    .Cells(RowStart + 46, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 47, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 48, 2).FormulaR1C1 = "=-R[-18]C[5]" 
    .Cells(RowStart + 45, 7).FormulaR1C1 = "=RC[-5]-R69C5" 
    .Cells(RowStart + 45, 7).AutoFill Destination:=Range(Cells(RowStart + 45, 7), 
     Cells(RowStart + 48, 7)), Type:=xlFillDefault 
' Loop 3 
    .Cells(RowStart + 53, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 54, 2).FormulaR1C1 = "=-R[-50]C[5]" 
    .Cells(RowStart + 55, 2).FormulaR1C1 = "=-R[-16]C[5]" 
    .Cells(RowStart + 56, 2).FormulaR1C1 = "=-R[-29]C[5]" 
    .Cells(RowStart + 53, 7).FormulaR1C1 = "=RC[-5]-R77C5" 
    .Cells(RowStart + 53, 7).AutoFill Destination:=Range(Cells(RowStart + 53, 7), 
     Cells(RowStart + 56, 7)), Type:=xlFillDefault 
' Loop 4 
    .Cells(RowStart + 61, 2).FormulaR1C1 = "=-R[-5]C[5]" 
    .Cells(RowStart + 62, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 63, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 64, 2).FormulaR1C1 = "=-R[-16]C[5]" 
    .Cells(RowStart + 61, 7).FormulaR1C1 = "=RC[-5]-R84C5" 
    .Cells(RowStart + 61, 7).AutoFill Destination:=Range(Cells(RowStart + 61, 7),  
     Cells(RowStart + 64, 7)), Type:=xlFillDefault 
' Check to see if another iteration is needed 
    HeadLoss = Abs(Cells(RowStart + 41, 5).Value) + 
     Abs(Cells(RowStart + 49, 5).Value) + 
     Abs(Cells(RowStart + 57, 5).Value)+  
     Abs(Cells(RowStart + 65, 5).Value) 
    RowStart = RowStart + 34 
    Count = Count + 1 
    End With 
Loop 

End Sub

来源

2013-04-09 user2263685

'做，直到水头损失<= 0.0001'不符合条件进入你的循环。改为'尽管...' – 2013-04-09 21:51:06

'做虽然HeadLoss> 0.0001'。另外，你有没有尝试向宏中添加断点以查看它停止的位置？并检查你的所有值是什么？ – user2140261 2013-04-09 22:01:31

Sub Iterate() 
    ' 
' Iterate Macro 
' 
' 
Dim RowStart As Long 
Dim HeadLoss As Long 
Dim Count As Long 
    RowStart = 19 
    HeadLoss = 0 
    Count = 2 
Do While HeadLoss <= 0.0001 
' Copy Previous Iteration 

    With ActiveSheet 
    Range(.Cells(RowStart, 1), .Cells((RowStart + 32), 7)).Copy .Cells(RowStart + 34, 1) 

    .Cells(RowStart + 34, 1).Select 
    Application.CutCopyMode = False 
    ActiveCell.FormulaR1C1 = "Iteration" & Count 

For i = 1 To 4 
    .Cells(RowStart + 37, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 38, 2).FormulaR1C1 = "=-R[-18]C[5]" 
    .Cells(RowStart + 39, 2).FormulaR1C1 = "=R[-34]C[5]" 
    .Cells(RowStart + 40, 2).FormulaR1C1 = "=-R[-29]C[5]" 
    .Cells(RowStart + 37, 7).FormulaR1C1 = "=RC[-5]-R61C5" 
    .Cells(RowStart + 37, 7).AutoFill Destination:=Range(Cells(RowStart + 37, 7), Cells(RowStart + 40, 7)), Type:=xlFillDefault 
Next i 

    HeadLoss = .Cells(RowStart + 41, 5).Value + .Cells(RowStart + 49, 5).Value + .Cells(RowStart + 57, 5).Value + .Cells(RowStart + 65, 5).Value 
    RowStart = RowStart + 34 
    Count = Count + 1 
    End With 
Loop 

End Sub

来源

2013-04-09 22:03:46 user2140261

'虽然HeadLoss> 0.0001'仍然没有进入循环... – 2013-04-09 22:06:16

因为0 <，那么0.0001更新了代码。 – user2140261 2013-04-09 22:10:09

现在可以为'做...循环' – 2013-04-09 22:12:19

我做的直到宏没有做任何事情

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