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- W4372207488 abstract "A three-dimensional straight pipe-curve fluid theory is developed for the modeling of pipes conveying fluids with arbitrary configurations, and the corresponding finite-elements-based numerical approach to the nonlinear dynamics of curved pipes is proposed. Initially, the theoretical model of a straight pipe-curve fluid system is built along with its corresponding finite element. Subsequently, this proposed methodology is tested by conveying fluids through semicircular curved pipes. Coupling vibration mechanisms between in-plane and out-of-plane systems are explored. Finally, the influence of non-linear terms related to internal forces on the vibrations of curved pipes conveying fluid is discussed to simplify the theoretical model. The results provide useful insights into the subject matter: (i) The three-dimensional straight pipe-curve fluid element proposed is effective in analyzing the vibration behavior of curved pipe conveying fluid; (ii) When the parameter vibration of the out-plane frequency occurs and the pulsation frequency is about two-thirds of the out-plane second natural frequency, the in-plane and out-of-plane vibrations couple with the beat frequency; (iii) When combined vibration of out-plane first and second natural frequencies occur, in-plane and out-of-plane vibrations coupled with the out-plane first natural frequency; (iv) The main factors causing out-of-plane and coupling vibration of in-plane and out-of-plane systems are nonlinear terms related to axial force and in-plane transverse force." @default.
- W4372207488 created "2023-05-07" @default.
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- W4372207488 date "2023-09-01" @default.
- W4372207488 modified "2023-10-15" @default.
- W4372207488 title "Three-dimensional vibration analysis of curved pipes conveying fluid by straight pipe-curve fluid element" @default.
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- W4372207488 doi "https://doi.org/10.1016/j.apm.2023.05.002" @default.
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