Research on Traveling Crane modal Parameter Identification During Operational Condition

摘要

In this paper output-only modernistic modal parameter identification methods is used to identification large-scale traveling crane modal parameters. The vibration response of framework of travel crane is measured in operational condition in field. In this paper the measurement process is simply described. The results of modal identification are shown after introduction of the principle of FDD (frequency domain decomposition) and SSI (stochastic subspace identification) that are used in the modal identification of the framework. On the basis of modal parameters estimation, every modal shape is analyzed in detail and MAC of modal shape is used to validate the estimated modal results. Analysis result of large-scale traveling crane is helpful for dynamic design and dynamic modification of large-scale traveling crane. The errors of modal parameters are investigated particularly.