The action forces applied on rock mass of equivalent continuum by seepage include two parts, i. e., hydrostatic seepage pressure and hydrodynamic seepage pressure (seepage bodyforce).
渗流对等效连续岩体的作用力包括渗透静水压力和渗透动水压力(渗流体积力)两部分。
2
Due to the dragging force, trajectories of spacecraft circling planetoid can departure from the standard taper curve orbit which is obtained by the two-body hypothesis.
绕小行星运行的航天器由于受到摄动力的影响，运行轨迹会偏离二体假设下的圆锥曲线轨道。
3
There are for features for the new method as follows: (1) The stability criterion for the rigid body and the pitch angle of the force between two strips will be deduced according to the energy method.