Buckling of step cylindrical shells under axial impact load

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (1) : 200-205.

GUI Yifei, MA Jianmin

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Abstract

The governing equation of a step cylindrical shell’s vibration displacements in radial direction under axial impact load was established and solved considering boundary conditions and consistency conditions to obtain its bifurcated conditions of dynamic buckling after stress wave reflecting.The relations among the critical buckling load, the position where the stress wave front reached the step cylindrical shell and the ratio of thickness to radius of the step cylindrical shell were acquired through numerical calculation.The numerical results showed that the axisymmetric buckling of the step cylindrical shell appearing is easier than its non-axisymmetric buckling occurring; the buckling occurring at the fixed end after the stress wave reflected by the fixed end passing through the division surface is harder than that before the reflected stress wave passing through the division surface be, while the buckling occurring at the impacted end is easier; the critical buckling load increases with increase in the ratio of thickness to radius and the ratio of thicknesses; for a step cylindrical shell and a constant thickness cylindrical one with the same mass, the step cylindrical shell’s buckling is easier before the stress wave reflected by the fixed end passing through the division surface, while the step cylindrical shell’s buckling is harder after the reflected wave passing through the division surface.

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Step cylindrical shells / Axial impact / Stress waves / Critical load

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GUI Yifei, MA Jianmin. Buckling of step cylindrical shells under axial impact load[J]. Journal of Vibration and Shock, 2019, 38(1): 200-205

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