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Topic: Integrating a data set and applying boundary conditions
Replies: 1   Last Post: Apr 1, 2013 6:47 PM

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Integrating a data set and applying boundary conditions
Posted: Apr 1, 2013 6:28 PM
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Dear All,

I have a matrix of bending moment data which I would like to double integrate over the length of a pile to obtain pile displacements using Matlab. I fit the bending moment data using polyfit and obtain regularly spaced values at small intervals using polyval.

I can integrate these values using the trapz function but I need to apply 2 boundary conditions - displacement is a particular value at 2 discrete points - to solve for the 2 integration constants which I do not know how to do in Matlab.

Also would double integration using trapz bring about significant errors?

Any suggestions and help would be most welcome.

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