How to specify PDE model coefficients in MATLAB 2015b?

I have MATLAB 2015b and I am trying to implement the example in this webpage (<http://nl.mathworks.com/help/pde/examples/dynamics-of-a-damped-cantilever-beam.html)>. For it I need to solve a PDE model, for which I need to specify coefficients. In the example, that is done with the function 'specifyCoefficients'. However, in MATLAB 2015b, that function is not avaiable yet.

How to specify the PDE model coefficients in MATLAB 2015b?

Thank you for the support. Kind regards, Pedro Ochoa

Answer 1

[Alan Weiss]

I suggest that you either use the built-in MATLAB help system, available by entering

doc

at the command line, or use the R2015b documentation.

Alan Weiss

MATLAB mathematical toolbox documentation

[Pedro Andre Viegas Ochoa de Carvalho]

Dear Alan,

I had already tried to find MATLAB 2015b documentation without success. Thank you for that.

I found the equivalent example of the cantilever beam for MATLAB 2015b. But I found something quite strange.

I tried to run the example for a beam with dimensions and material properties different from the example, and the solver could not find the eigen values. When I changed back to the dimensions and properties of the example, the solver behaved properly.

I noticed that in the example those constants are defined in the american system (inches, pounds per square inches, etc).

Is it related to that? If so, how can change that?

Thank you. Kind regards,

Pedro Ochoa

[Pedro Andre Viegas Ochoa de Carvalho]

Dear Alan,

In the example

(<http://nl.mathworks.com/help/releases/R2015b/pde/examples/dynamics-of-a-damped-cantilever-beam.html>)

what should be the units of the force, P?

Thank you. Regards,

Pedro Ochoa

[Ravi Kumar]

Hi Pedro,

P is distributed load, hence it should be provided as force per unit length. For example, if you are using SI units, then P should be in N/m.

Regards,

Ravi