It confines the function of the SHM system. Therefore, the further research of modal parameter identification (MPI) and DI method adapting the need of on-line SHM system has the important theoretical significance and engineering practical value.

• 因此，进一步深入研究能适应大型土木工程结构实时健康监测系统需要的模态参数识别和损伤识别方法具有重要的理论意义和工程实际应用价值。