For block systems with small strain, finite displacement and finiterotation, a 3-dimensional mode distinct element method (3mdem) was presented.
本文针对小应变、大位移和大转动的块体系统建立了三维模态变形体离散元数值模型(3mdem)。
2
With the help of the theory of quaternions the theorems of commutativity of composition for the finiterotation of rigid body are proved in the any order.
借助于四元数理论证明了任意顺序下刚体有限转动合成的可交换性定理。
3
A rotation transformation method is to be used in changing an ordinary linear programming (LP)problem into an equivalent easily-solved continuous knapsack one after a finite iteration.