基于模型缩聚的θ指标损伤识别方法

摘要

The authors propose a method for damage detection in large three-dimensional truss structure in this paper.The method is based on the model reduction techniques by using acceleration sensor ,a limited number, for getting the natural vibration frequencies and mode shapes of large three-dimensional truss structure to complete the damage identification.Numerical simulation results show that the method ofθ index damage identification, based on model reduction, whether in the damage location identification or quantitative recognition has good performance.%为实现大型三维空间结构的损伤检测，提出了一种基于模型缩聚技术的检测方法。该方法利用有限数量的加速度传感器，得到大型三维桁架结构的自振频率和模态振型，以完成损伤的识别。数值仿真结果表明：该方法在损伤的定位识别和定量识别上能达到预期的适用性和可靠性。