Problems solving integrals

Forum|Forum|12 years ago
April 25, 2014
2 replies
4144 views

Hello,

My name is Tim van Lunteren and I am currently graduating for engineer.

I never used Mathcad before and I just started using it.

I finished some tutorials and practised a bit.

Now I have to make my own equation to calculate the deflection of a thin walled cilindrical beam.

I tried to calculate it manual, but it is just too damn hard and difficult.

I tried to put it into Mathcad. I get the derivatives with respect to the different variables.

I set up three integrals and I want to know the equation to solve it into the three unknown variables.

It just doesn't want to solve and I don't know where to search.

I attached the file. can anyone send me in the right direction?

Greetz,

Tim

1_Deflection-equation-mcdx.zip

Calculus_Derivatives

Best answer by Werner_E

While I personally prefer MC15 over Prime for a multitude of reasons the problem you have is not a Prime or Mathcad question (unless you insist on using the solve block).

Richard has already pointed you to the errors you made and showed how to solve your problem using a symbolically evaluated solve block (thats what Prime won't allow).

You can also use the symbolic solve command (equally in both flavors of the program). See attached a solution in Prime3.

BTW, the error at Rbx is because this variable is not defined and Mathcad therefore would not be able to evaluate that function M() numerically. This error does not affect symbolic manipulations, though.