setting up a matrix

how can i use matlab to setup a matrix and solve for all the unkowks of the truss below when F1= 435 and f2=521.

[caroline bourn]

you need to set up a matrix of node locations etc, [x y x]

eg.

location_of_nodes = [3 4 0; % A
                     0 4 0; % B etc 
                    ... ] 
                     

you also need to state your element properties i.e. DoF , forces and their magnitude.

                    f1 = 435
                    f2 = 521
                    DoF = % whatever you set it as. should be given in the question

then you need to make an element connectivity matrix which sets which nodes are connected to what.

                    elem_connectivity = [ ...]

then you need to find the number of nodes and elements. and the number of DoF acting on the nodes.

you also need to define a force vector based on the number of DoF and becase you KNOW where the forces are acting and the direction you can easily do this. i.e.

                    force = [ 0 521 0 ... on node one.. this is not the case but this is an example. 

there is a tutorial to questions like this and similar and youtube :) highly suggest watching @Matthew Lyon

[caroline bourn]

you also need to set up a boundary conditions matrix which is where your truss is constrained and in the direction it is constrained in. i.e [ x, y, z]

then you should be able to apply you're mechanics knowledge and solve the question through matlab. i am going to assume this is an FEA course or a mechanics course. HIGHLY HIGHLY suggest watching the tutorials and seeking tutorials online!!!!

[Matthew Lyon]

can you post the youtube link couldnt seem to find them

[caroline bourn]

https://www.youtube.com/watch?v=Ghc-RI1c3TQ&ab_channel=MahdiFarahikia

[caroline bourn]

look this up as well,

MATLAB - Plane Truss Element, it is a video by Kamran Yunus. i tried to post the link but mathworks marked it as spam

Answer 1

[KSSV]

https://in.mathworks.com/matlabcentral/fileexchange/73840-itruss?s_tid=srchtitle

https://in.mathworks.com/matlabcentral/fileexchange/76228-optimization-benchmark-truss-problems?s_tid=srchtitle

More here: https://in.mathworks.com/matlabcentral/fileexchange?q=Truss