Re: GNUstep for Engineers

[Markus Hitter]

Am 14.03.2007 um 17:14 schrieb Stefan Bidigaray:

> DOF = Degrees of Feedom
>
> FENode
> -> a class method to find how many FENodes exist
> -> Position (in 3D, so I will probably have to create a new type)
> -> 6x6, or smaller, matrix (1 row/column for each DOF)
> -> DOF of node
> -> Force array

Make sure to consider versioning here. A next generation node might  
include properties like heat, radiation, velocity, ...


> FEElement
> -> a simple class that defines information common to all elements.
> |-> Connecting nodes, an NSArray
> |-> Modules of Elasticity (E)
> |-> Poisson's Ratio (nu)

The usual approach here is to  put common properties in a FEMaterial  
class and to store a pointer to the material in the element only.  
Alternatively, you could group elements and store the material in the  
group's properties. Material properties are almost always equal over  
a lot of elements, which reflects the real world pretty good.


Markus

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Dipl. Ing. Markus Hitter
http://www.jump-ing.de/