Study on construction of the evaluation technology of the ore pressure using the distinct element method

利用DEM和有限元相结合的方法，编制了考虑矿粒运动与船体结构变形耦合影响的计算程序，通过在DEM中引入临界旋转力矩来再现实际矿粒的运动行为。利用数字高程模型可以准确地计算静态矿压。为了准确地评价矿压，必须考虑矿石颗粒在循环滚动运动下的紧缩性和凝聚性。船体结构变形在一定程度上会对矿压产生影响。

The calculation program considering the coupling effect of ore particle motion and the ship structure deformation utilizing DEM and FEM is developed.The behavior of actual ore particle is able to reproduce by introducing the critical rotation moment in DEM. The static ore pressure is able to calculate accurately by utilizing DEM. It is necessary to consider the effects of tightening and condensing of ore particles under cyclic rolling motion in order to evaluate the ore pressure accurately. The deformation of hull structure affects on the ore pressure at certain level.