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M
mverweijmeren1-Visitor
1-Visitor
April 18, 2016
Question

solve block issue solving force moment equations

  • April 18, 2016
  • 3 replies
  • 5704 views

Currently can solve a set of equations with the solve block. This works now only because I manualy copy the summation outcome(grey area) in the solve block (green area) and set it equal to zero. If I just enter the summation of forces/moments and set it equal to zero I won't get any result presented(red highlighted). SO what goes wrong/what should I do to not have to copy the outcome every time manualy in the solve block.

My file is

3 replies

F
Fred_Kohlhepp23-Emerald I
23-Emerald I
April 19, 2016

I believe some of your problem lies in variable definition.

This notation works for the symbolic processor, but (note the red) the numeric processor doesn't approve.

The "undefined variable" error also tends to be Mathcad's standard complaint if anything doesn't work in a solve block.

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-MFra-21-Topaz II
21-Topaz II
April 20, 2016

CC.jpg

M
mverweijmeren1-VisitorAuthor
1-Visitor
April 22, 2016

These variables are indirectly present/stated within the Fpc,Fwp1...vectors. I also gave the iniatial vales for the vector components. But apparently Mathcad solve block cannot handle this in this way.

R
RichardJ19-Tanzanite
19-Tanzanite
April 20, 2016

Use function definitions to carry the variables of interest through the worksheet as function arguments. No matter what you are doing, this is almost always the best way to approach a problem in Mathcad.

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mverweijmeren1-VisitorAuthor
1-Visitor
April 22, 2016

ok, I have seen your changes, looks fine but still doesn't make it solvable by the mathcad solve block.

R
RichardJ19-Tanzanite
19-Tanzanite
April 22, 2016

still doesn't make it solvable by the mathcad solve block.

?? Yes it does. Both solve blocks work, and give the same answers.

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