本文利用钻头不同位置不同方向的惯性矩和挠曲对其弯曲刚性进行解析。

This paper by means of different locations inertia moment of different directions and bending of the drill, analyses its bending rigidity.

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本文先提出了弯曲刚性临界转速与弯曲挠性临界转速的概念，然后又提出半挠性转子的概念。

In this paper, first, the concepts of the bend-rigid critical speed and bend-flexible critical speed of rotors are presented, and then the concept of a semi-flexible rotor is presented.

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此外，考察了膜和高分子链段之间的相互作用，高分子链长以及膜的弯曲刚性、张力对膜形变的影响。

Moreover, the interaction between the membrane and polymer chain length, and the effects of bending rigidity and surface tension on the deformation of the membrane are investigated.

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