International Society of Science and Applied Technologies |
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Modal Analysis and Crack Propagation Residual Life Prediction of Vibrating Screen Beam | ||||
Author | Zerong Zhang
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Co-Author(s) | Yongyan Wang; Zhimin Fan
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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.
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Keywords | vibrating screen beam, modal analysis, multiple damage, crack propagation, residual life | |||
Article #: 23-327 |
August 3-5, 2017 - Chicago, Illinois, U.S.A. |