中文摘要：

在传感器优化布置的基础上通过两阶段识别方法对网架结构的损伤进行识别.根据传感器优化布置的结果确定第一步要测得节点,通过MATLAB中的小波工具箱以单元应变能变化率为损伤指标进行小波分析,确定第二步要测得节点.第二步在缩小了的范围内以单元节点应变能变化率确定结构的损伤位置.结果显示,该两步法识别网架结构损伤可行.

英文摘要：

The damage identification of reticulated shell was taken on though two-step identification method on the basis of the optimal placement of sensors. The measuring points can be determined according to the optimal placement of sensors,which can be analyzed through the wavelet toolbox of MATLAB,in which make the change rate of modal strain energy the damage index. Then the measuring points of second step can be found. The damage location can be identified from the second step by the change rate of modal strain energy. The result shows that the two-step method is feasible.