摘要:
建筑结构形式向大型的、超限的、复杂的方向发展，而拱形结构是其中应用广泛的一种。建筑结构在各种不利因素的影响下，极可能发生结构损伤，甚至发生致命危害。结构损伤会导致结构的模态参数变化，因此，通过一个拱结构的有限元分析，提取频率，振型等模态信息，对模态差，一阶导，二阶导分析，探寻其损伤位置，结果表明能通过突变情况得到单元的损伤位置。
Abstract: As the further development of large, overrun, complex civil engineering structure, arch structure is one of the most widespread structures. Under the influence of various unfavorable factors, civil engineering structure may cause damage, even catastrophic accidents. Structural damage will cause the structure modal parameters change. Therefore, by means of the finite element analysis of an arch structure, mode information was extracted such as the frequency and mode shape. And by means of the analysis of the mode difference, the first and the second derivative, the damage location was explored. The results showed that the damage location could be obtained by the mu-tation situation.