Strain Growth in a Finite-Length Cylindrical Shell Under Internal Pressure Pulse

Abstract

Strain growth is a phenomenon observed in the elastic

Numerical simulation of the effect of flange radial length on strain growth of cylindrical containment vessels

“…When the radial length of flange is 1-5 cm, the increase of maximum strain and strain growth factor is relatively slow along with the radial length, while when the flange length increases to 7 cm, the growth of maximum strain and strain growth factor is more significant. The possible reason may be the fact that with the increase of flange length, the bending axisymmetric modal disturbance caused by flange becomes more severe, thus increasing the linear modal coupling response of cylindrical shell [7,15]. As shown in Fig.…”

“…At present, the strain growth mechanism of explosion containment vessels is mostly studied by thin-walled cylindrical shells with finite length and uniformly distributed load. The cylindrical shell analyzed in this section is identical with the experimental device of W. H. Zhu [2,12] and the numerical model of Q. Dong [7] in size and parameters, as shown in Table 1 and Table 2. In order to ensure both the accuracy and efficiency of calculation, the shell is divided into 6, 40 and 96 grids in radial, axial and circumferential directions, respectively.…”

“…is the inner radius, is Young's modulus, is density. The breathing mode frequency of plane strain of cylindrical shell is [7]:…”

“…Q. Dong et al (2017) [7] analyzed the strain growth mechanism of cylindrical shells under three different boundary conditions using numerical simulation.…”

“…In the last decade, Q. 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. As a common structure of explosive vessels, flanges are bound to excite different vibration modes leading to increase strain growth.…”