I should have some time before end of week, and I'll take a look at that.

May be I'll get illuminated.

Chaps


news:3c518884@news.povray.org...
> Hi Chaps!
>
> What a coincidence! I spent nearly all day yesterday to try to understand
> that document. Actually I did understand most of it, but I got badly stuck
> with the C(x) condition vector... I believe there must be some errors, or
at
> least it is not very well explained, because in the Stretch Forces section
> (4.2), C(x) is defined as a 2-dimensional vector:
>
> C(x) = a (|wu(x)| - bu , |wv(x)| - bv )
>
> However, in the shear and bend forces section (4.3), C(x) is defined as
>
> C(x) = a * wu(x)^T * wv(x)
>
> Which, I believe it is 1-dimensional, that is, a scalar.
>
> And then, in the Forces and Force Derivatives section (4.1) it says that
the
> force can be computed like this:
>
> f_i = -k dC(x)/dx_i * C(x)
>
> But f_i is a 3-dimensional vector, so I believe there must be an error
> because there is no dimensional agreement. I may be wrong, but I'm stuck.
>
> Did you have the same problem?
>
> Fernando.
>

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