Research and simulation on dredging grab

At first,the working situation of the dredging grab is analyzed. The main difference between the dredging grab and the bulk cargo grab on land is found out. The model of dredging materials referring to terrene mechanics is established and the cut-in forces and their resistances are provided, which are different from the bulk cargo grab on land in character and quantity, thus, the mechanics model of the dredging process is established. Then the dredging curve function is computed and simulated on the basis of mechanics model. The dredging depth, the total dredging volume and the mass of the grab are obtained. In addition, the dredging curve is made and the effect of clinging force and tine is found out as well. At last some conclusions are drawn,which are expected to be helpful to the engineer's real design.