RE: finite element limitations??

Thread View: sci.math.num-analysis

3 messages

[T] Back to Threads [V] Tree View [G] Group Articles

3 total messages Started by Han de Bruijn Mon, 14 Dec 1992 13:35

#858

Author: Han de Bruijn
Date: Mon, 14 Dec 1992 13:35

12 lines
1246 bytes

In article <1992Dec11.184635@roper.mc.ti.com> Don Rolph:
> Excellent response - so long as one chooses appropriate shape function
> (ah now there's the rub!!) FEA methods dont "fail"!

Sorry Don. The gist of an FEA method is definitely _not_ in an appropriate
choice of the shape functions. There exist many working FEM methods which
do not even refer to something like a shape function, yet are successfull.
-- 
* Han de Bruijn; Applications&Graphics | "A little bit of Physics * No
* TUD Computing Centre; P.O. Box 354   | would be NO idleness in  * Oil
* 2600 AJ  Delft; The Netherlands.     | Mathematics" (HdB).      * for
* E-mail: Han.deBruijn@RC.TUDelft.NL --| Fax: +31 15 78 37 87 ----* Blood

Re: finite element limitations??

#867

Author: Fred Walsteijn
Date: Mon, 14 Dec 1992 23:20

17 lines
1186 bytes

In <1992Dec14.133530.24703@dutrun2.tudelft.nl> rcpshdb@dutrun2.tudelft.nl (Han de Bruijn) writes:

>In article <1992Dec11.184635@roper.mc.ti.com> Don Rolph:
>> Excellent response - so long as one chooses appropriate shape function
>> (ah now there's the rub!!) FEA methods dont "fail"!

>Sorry Don. The gist of an FEA method is definitely _not_ in an appropriate
>choice of the shape functions. There exist many working FEM methods which
>do not even refer to something like a shape function, yet are successfull.

                                 ^^^^^^^  huh ????

Try to get good results from a linear standard FEM method applied
to the inviscid Burgers' equation.
In this case other basis functions should be used...

Fred -- walsteyn@fys.ruu.nl

RE: finite element limitations??

#882

Author: W. Donald Rolph
Date: Tue, 15 Dec 1992 14:26

10 lines
960 bytes

You are indeed confused.  Any approximation p[rocedure must have trial functions.
 In traditional FEA they are called shape functions, choose the name you like but
all FEA procedures musat have some approximating function over the domain space. 
Now we csan talk about how to derive these functions  and how to apply them!
-- 

Regards.
 
Don Rolph  a722756@pan.mc.ti.com WD3 MS10-13 (508)-699-1263

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads