Modal Analysis and Crack Propagation Residual Life Prediction of Vibrating Screen Beam  
Author Zerong Zhang
Co-Author(s) Yongyan Wang; Zhimin Fan
Abstract In order to study the relationship between the modal parameters and the fatigue crack size of the vibrating screen beam, the finite element model of the damaged beam was built. The modal frequencies, the displacement mode shapes and the strain mode shapes of the vibrating screen beam were extracted by numerical simulation method. The results show that the modal frequencies have little change between the intact and damaged beam, the displacement mode shapes of the damaged beam have no obvious mutation, but the strain mode shapes have mutation peaks at the multiple damaged location for the damaged beam. The strain modal change ratio increases with the increasing fatigue crack length of the damaged beam. The crack propagation residual life of the damaged beam was calculated by the Paris formula of integral form, which is beneficial to maintenance forecast of the vibrating screen beam.
Keywords vibrating screen beam, modal analysis, multiple damage, crack propagation, residual life
    Article #:  23-327
Proceedings of the 23rd ISSAT International Conference on Reliability and Quality in Design
August 3-5, 2017 - Chicago, Illinois, U.S.A.