应用改进的曲率模态分析方法对具有多处结构损伤的简支梁结构进行了损伤识别,通过数值计算得到了简支梁的曲率模态,由此结果可以确定出损伤单元及位置。由于曲率模态法对结构损伤的识别不敏感,所以文中提出了曲率模态差这一新的概念,思想是通过对曲率模态差的突变研究来判定损伤结构中损伤单元的位置。通过算例分析,其识别效果明显优于曲率模态法。 An improved method of curvature modal analysis is applied to the damage identification of simply supported beams with multiple structural damage. The curvature modes of simply supported beams are obtained by numerical calculation. From these results, the damaged elements and their locations can be determined. Because the curvature modal method is not sensitive to structural damage recognition, a new concept of curvature modal aberration is proposed in this paper. The idea is to determine the location of damage cells in the damage structure through the abrupt change of the curvature modal. Through the example analysis, the recognition effect is obviously better than the curvature mode method.