曲率模态和柔度曲率对损伤的敏感性研究

以简支梁的损伤识别为例,用有限元方法进行建模和计算,比较分析了曲率模态和柔度曲率对结构损伤识别的敏感性.当梁发生损伤的类型不同时,损伤部位对未损伤部位的影响以及各处损伤部位间的相互影响不同,导致曲率模态或柔度曲率对损伤的敏感性有时会下降,单独用一种方法不能准确地识别结构的损伤,应综合运用两种方法对损伤进行识别;而且这两种方法能互相补其不足,可以更有效的对结构的损伤进行识别.

Study of Sensitivity of Identification of Damaged Locations in Structures Based on Curvature Mode and Flexibility Curvature

Take the case of the identification of damaged locations in simple beam,the sensitivities of the curvature mode and the flexibility curvature are analyzed by the modeling and the computation with the finite element method.When the types of damage are different,the effects which one damaged location has on another damaged location or which the damaged location has on the undamaged location are different.Thus,the sensitivity of the identification of damaged locations in structures based on the curvature mode and the flexibility curvature is weaken.The damage is not able to be identified accurately by only one method.The damage identified by two methods is accurate.Moreover,two methods can redeem its lack of special features each other,so the damage in structures can be identified effectively.