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