throatless rotary shearing machine 无喉式旋转剪切机
rotary shearing mechanism 旋转切削机构
shearing dformations and rotary inertia 剪切效应和转动惯性
Currently, the DTH RIGS use generally a percussion rotary penetration sys-tem to generate the rotating torque that produces a shearing action for breaking rock.
目前，潜孔钻机普遍采用冲击回转凿入系统，用以产生回转力矩，对岩石产生剪切作用而成颗粒分离。
The result also denotes the shearing deformation and rotary inertia of the beam have significant effect on the high frequency.
当考虑梁的剪切变形和转动惯量时，则对梁的高阶频率影响较大。
The high natural frequencies of symmetrical section beam with different constraints are calculated in detail, and effects of rotary inertia and shearing deformation are given.
计算了对称截面粱在不同边界条件下的高阶固有频率，讨论了转动惯量及剪切变形效应对各阶固有频率的影响。
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