多元结构损伤识别的曲率模态分析及数值仿真(英文)

Curvature Modal Analysis and Numerical Simulation in Diverse Structural Damage Identification

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。

The several damage sites of a simply supported beam structure are identified by using curvature mode method.The curvature mode of simply supported beam is given through numerical computatcon. As a result, the sure damage site is made. But curvature mode method is not sensitive to the nearby damage. Therefore, a new concept i.e. curvature mode difference is put forward. The idea of curvature mode difference is made sure structure damage site through the mutation of curvature mode difference.Through calculation example the better results comparing with curvature mode method are obtained.