以下为句子列表：
英文: To characterize the local discontinuity due to the crack, a rotational spring model is proposed to model the crack, on the basis, a method for crack identification is presented in this paper, which makes use of the driving-point mechanical impedance chara
中文: 为了描述由裂纹引起的梁中波传播的不连续特性，引入弯曲弹簧模型来模拟裂纹，并在此基础上提出了利用梁结构驱动点阻抗特性的裂纹损伤识别方法。
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