How to chose right conditions

Hello, i have been trying do that this couple of months and i cant solve this problem by my own.
I dont know , how and which conditions i need to choose to get all worked up.
My main topic is to calculate the displacement of my metal sheet, by changing body load on upper axis, and whole mechanism suppose to be in rotation. Upper roller have to be the one which makes all system move. Please help me with this asap.