Hi Guys, i was wonering if any of you can please help me on a quick simulation. i have a cover grate modelled up which consits of a 40 x 40 box section frame with 6mm steel welded on top with 40 x 10 bracing every 300mm underneath. the clear opening of the hole is 1200 x 240 which allows the box section frame to rest on. i tried simulation a point load force on this in the centre and it was showing way crazy results like showing the plate on top spewing through.
I basically want to test it to see what the maximul load it can take but for some reason it is not going too well. can someone please simulate thsi as i am unsure on the fixing as it is not blted down and it just rest on top of a fixed hole.
I have attached my models and pictures and will greatly appreciate it if someone can help me with this