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• W2560380999 abstract "The beam structure with breathing cracks subjected to harmonic excitations was modeled by FEM based on Euler-Bernoulli theory, and a piecewise dynamical system was deduced. The precise integration method (PIM) was employed to propose an algorithm for analyzing the dynamic responses of the deduced system. This system was first divided into linear sub-systems, between which there are switchingpoints resulted from the breathing cracks. The inhomogeneous terms due to the external excitations were tackled by introducing auxiliary variables to express the harmonic functions, hence the sub-systems are homogeneous. The PIM was then applied to solve the homogeneous sub-systems one by one. During the procedures, a predictor-corrector algorithm was presented to determine the switching points accurately. The presented method can provide solutions with an accuracy to a magnitude of 10-12 compared with exact solutions obtained by the theories of ordinary differential equations. The PIM results are much more accurate than Newmark ones with the same time step. Moreover, it is found that the PIM can maintain a high level of accuracy even when the time step increases within a relatively wide range." @default.
• W2560380999 created "2016-12-16" @default.
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• W2560380999 date "2016-12-10" @default.
• W2560380999 modified "2023-09-27" @default.
• W2560380999 title "Dynamic responses of a beam with breathing cracks by precise integration method" @default.
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• W2560380999 doi "https://doi.org/10.12989/sem.2016.60.5.891" @default.
• W2560380999 hasPublicationYear "2016" @default.
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