中文摘要：

空间结构的损伤识别问题是一个相对复杂的过程,需要考虑结构的空间三维振动情况。针对空间刚架结构的损伤识别问题,提出了一种新的损伤标示量——轴向振型差变化率,研究了单一损伤和多位置损伤工况下,不同损伤位置对空间刚架一阶轴向振型差变化率的影响规律。实验室刚架模型实验结果表明：一阶轴向振型差变化率能够很好的对单一或多个损伤的损伤位置进行识别,为探索通过轴向振型差变化率识别空间刚架的结构损伤提供了一种可行的方法。

英文摘要：

Space structure damage identification is a relatively complex process in considering three dimensional vibrations of the structure.In this paper,a new standard,the axial mode shape difference is put forward for space frame structural identification.The influence disciplines of space frame structure first-order axial mode shape difference are researched,including single damage,multiple location damage,different damage location.The results of space frame structural model experiment show that the first-order axial mode shape difference can identify single or multiple damage location,providing a feasible method through axial mode shape difference to identify the space frame structural damage.