Abstract
In this paper, the effect of radial length of flange on the strain growth in the elastic range of the cylindrical shell is studied by numerical simulation using LS-DYNA. It is found that the influence of the flange length on the first strain peak is small. As the radial length of the flange increases, the bending disturbance of the various frequencies of the cylindrical shell is excited which makes the linear modal coupling response is enhanced, so that the strain growth factor is increased. When more high-frequency parts are introduced into the strain response, the strain growth time will be correspondingly shortened. Therefore, it is recommended to use a flange as small as possible when designing the explosion containment vessel.
Highlights
As a device to limit the effects of explosion products and shock waves, explosion containment vessels are widely used in military and civil fields
The results showed that the coupling between the breathing mode and bending modes is the primary cause of strain growth, and the first peak strain and the ratio of thickness to radius are the main factors that determine the strain growth
This is because the flange is located at the end of the cylindrical shell, so the disturbance caused by it is not superimposed on the initial strain response of the middle section [15]
Summary
As a device to limit the effects of explosion products and shock waves, explosion containment vessels are widely used in military and civil fields. Karpp et al (1983) [1] revealed that the disturbance of flanges would cause strain growth of the vessels by analyzing two-dimensional (axisymmetric) numerical model for spherical vessels. Li et al (2008) [4] analyzed the planar linear and nonlinear dynamic responses of the ring under implosion loading by numerical simulation. NUMERICAL SIMULATION OF THE EFFECT OF FLANGE RADIAL LENGTH ON STRAIN GROWTH OF CYLINDRICAL CONTAINMENT VESSELS. Dong et al [5, 7,8,9,10,11] inherited the previous research results, systematically analyzed the strain growth of the shell, and summarized the mechanism of causing strain growth into three aspects: nonlinear modal coupling, linear modal superposition and resonance caused by explosion load. The suggestion for flanges to safely optimization design of cylindrical explosion vessels have been proposed, which inhibit strain growth effectively
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