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MarkDowney1-Visitor
1-Visitor
June 23, 2011
Question

Differential Equation Problem

  • June 23, 2011
  • 3 replies
  • 2597 views

I have used MathCAD for years, but not with differential equations. I have a defined function, with only one variable (z), that I requre the 1st, 2nd and 3rd derivative of theta, and I only need their values at z = l/2, which is 90 inches in this example. Aside from the trigonometric functions in the function definition, I didn't think this would be such a problem for MathCAD. Is there a simple way to obtain the solutions I require in MathCAD? (I have attached the example worksheet)

3 replies

P
ptc-16567211-Visitor
1-Visitor
June 23, 2011

Try to specify the function θ argument θ(z).

V
ValeryOchkov24-Ruby IV
24-Ruby IV
June 23, 2011

See the attach!

M
MarkDowney1-VisitorAuthor
1-Visitor
June 23, 2011

That solves my problem! I guess I need to brush up on this function in MathCAD.

Thank you very much.

F
Fred_Kohlhepp23-Emerald I
23-Emerald I
June 23, 2011

Define theta as a function of z. Mathcad can then develop the derivatives and evaluate them.

I've butchered your worksheet (sorry), but you can see the results.

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