摘要
应用模态应变能理论得到了能用于板类结构损伤的识别指标.假定结构存在不同位置和不同程度的损伤,运用Ansys进行有限元分析,得到板损伤前后的前五阶模态.然后再运用M athem atics软件,编程计算结构的各单元的损伤指标.数值模拟结果表明,损伤指标在损伤单元处的数值是最大的.因此,采用本研究提出的损伤指标,对板类结构进行损伤定位识别是可行的.
Based on the theory of modal strain energy, a damage index is deduced to identify the plate-like structure damage. Supposing that there lie some different damage positions and extents in structure, the Software Ansys is applied to obtain the first five modes of plate structure before or after damage using Finite Element Analysis, and then every element damage index in structure is calculated using the Software Mathematics program. The numerical results show that the damage index value in the damage element is the biggest one. It is concluded that the proposed damage index is feasible for the damage localization of plate-like structures.
出处
《长沙理工大学学报（自然科学版）》
CAS
2006年第1期27-30,40,共5页
Journal of Changsha University of Science and Technology:Natural Science
关键词
板类结构
损伤识别
模态应变能
plate-like structure
damage identification
modal strain energy
