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Re: How to assembly a stiffness matrix ?

• To: mathgroup at smc.vnet.net
• Subject: [mg60074] Re: [mg60066] How to assembly a stiffness matrix ?
• From: Chris Chiasson <chris.chiasson at gmail.com>
• Date: Thu, 1 Sep 2005 02:13:10 -0400 (EDT)
• References: <200508310632.CAA23243@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

The terms in the global stiffness matrix depend on the orientation of
the local elements to the global coordinate system. You will need a
transformation matrix and the location and orientation of all local
elements relative to the global coordinate system.

On 8/31/05, Francesco <emailnonvalida at email.it> wrote:
> I have a structure ( i.e. a crane ). I split the structure in a certain
> number of simple elements ( shaft or beam ).
> For each element i can build a local stiffness matrix of 12x12 element.
> Then i need to assembly this little matrixes in the big structure
> matrix. Dimension of the structure matrix is equale to: ( number of
> nodes x 6 ). nodes are cross point between elements.
> 
> Each element matrix has a specifical location in the big matrix.
> 
> How i can assembly the big structure matrix, starting by the single
> element matrix ?
> What i want to input is only the dimension of the structure matrix and
> the data of each single element matrix. The big structure matrix should
> be calculated by Mathematica.
> 
> Thanks in adavance for help and sorry for my very bad english
> 
> Regards,
> 
> Francesco
> 
> 


-- 
Chris Chiasson
http://chrischiasson.com/
1 (810) 265-3161