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- W948474430 abstract "The parametric instability of twisted Timoshenko beams with localized damage under an axial pulsating force is studied. The bending vibration equations of motion in the twisted frame are established using the Hamilton׳s principle. The partial differential equations of motion are then discretized into a set of second-order ordinary differential equations with periodic coefficients of Mathieu–Hill type by using a finite element approach. An eigenvalue problem is formulated to determine the instability regions of the twisted Timoshenko beams with localized damage based on Bolotin׳s method. The effects of the twist angle, the damage location, the extent of the damage, the static component of axial force and boundary conditions on the instability regions of the damaged twisted beam are investigated. Two parameters associated with the parametric instability are used to assess the destabilizing effect of damage location and extent of damage on the parametric resonance of twisted beams with localized damage." @default.
- W948474430 created "2016-06-24" @default.
- W948474430 creator A5012545488 @default.
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- W948474430 date "2015-09-01" @default.
- W948474430 modified "2023-09-25" @default.
- W948474430 title "Parametric instability of twisted Timoshenko beams with localized damage" @default.
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- W948474430 doi "https://doi.org/10.1016/j.ijmecsci.2015.07.009" @default.
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