Recent content by jackcolebrook

Hi Skeleton Apologies, should have been more clear on the document, my writing is terible! 74GPa is the young's modulas of Aluminum and area was based on a 10mm dia bar. Attached are my MATLAB files. DSM01 set up the problem, truss2d returns a mass and stiffness matrix for a given...

Thanks for the help skeleton, Could you take a look at my workings as see if I am talking cobblers. If I use direct stiffness method, I can obtain a global stiffness for a framework. This is done by decomposing the frame into sperate trusses. Calulating the stiffness in local co-ordinates...

Hi I'm trying to find the modal frequencies of a pin-jointed frames, to validate an ansys model. So far I've used direct stiffness method to generate a global stiffness matrix for the framework in Matlab. Is it as simple as mutiplying the stiffness matrix with an inverted mass matrix and...