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.

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。

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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.

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。

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