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smilani1-Visitor
1-Visitor
January 20, 2018
Solved

Non linear equation solution with data function

  • January 20, 2018
  • 2 replies
  • 4450 views

Dear All,

 

I need to solve a non linear equation in mathcad 15.

 

InputInput

 

 

After a physical test, I obtain the Mbase and phi value, that I use to determine mu trend (right graph).

I after need to use the mu function in a non linear equation, to determine the equilibrium configuration of the structure.

 

NL equationNL equation

 

How can I use the mu(phi) function in the NL equation? if I set mu as constant I don't have any problem.

 

I have a problem with mathcad file attach.

Best regards

Stefano

 

Best answer by -MFra-

Here is the worksheet.
Greetings FM

 

2 replies

T
21-Topaz II
terryhendicott21-Topaz II
21-Topaz II
January 20, 2018

To include the mathcad file you need to zip it first.

S
smilani1-VisitorAuthor
1-Visitor
January 20, 2018

Thanks,

I attach zip file

-
-MFra-21-Topaz II
21-Topaz II
January 20, 2018

Hi,

smilani.jpg

S
smilani1-VisitorAuthor
1-Visitor
January 20, 2018

Dear MR,

 

thanks for your reply.

I don't need to find the solution in previous point, but I would like to define a mu function from where the non linear equation catch the value for the numerical solution.

The mu parameter is not constant but vary with the rotation (phi), so I need to create a spreadsheet that automatically iterate the mu function.

If the function was defined, I don't have any problem, but in this case, the function is defined by data points, and I need to interpolate this value to solve the NL equation.

 

Best regards

Stefano

S
smilani1-VisitorAuthor
1-Visitor
January 20, 2018

For example:

 

NL solutionNL solution

 

Now mu is a function of phi and the NL solution is reported in the previous picture.

I don't know how can I create the mu  function by data point that can be used in the NL equation.

 

Best Regards

Stefano

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