Large Bulldozer Rops / Fops Design Calculations

Roll over protective structure (ROPS) is a device which installs on out of construction vehicle .The main functions are: when the vehicle rolling over .ROPS can prevent the vehicle from rolling over further ,and reduce the possibility of rolling vehicle injures operator ; When the vehicle traveling on freezing soil .concrete and rock ,it has large resist continuous impact ability ; When the vehicle overturning ROPS can support the whole vehicle .Arrangement of falling object protective structure (FOPS) can block objects (such as trees ,rocks) so that supply protection for operator .This problem is that research rolling over and falling objects protective structure of bulldozer by learning research condition of ROPS/FOPS and relative lay down international standard .On the base of theory analysis .detrudes counting formula of ROPS/FOPS deformation through founding mechanics analysis model of ROPS/FOPS at the stage of elasticity and plastoelastic .And finds a set of feasible nonlinear finite element analysis counting.lt calculates ROPS/FOPS plastoelastic deforma variable of 320hp bulldozer, bulldozer has been carried out by optimizing design method . .Finally,structure design has been finished by three dimensional design software Autodesk inventor.