Numerical dynamic analysis of stiffened plates under blast loading

Abstract

Using the general purpose finite element package Abaqus, an investigation has been carried out to examine the dynamic response of steel stiffened plates subjected to uniform blast loading. The main objective of this study is to determine the dynamic response of the stiffened plates considering the effect of stiffener configurations. Several parameters, such as boundary conditions, mesh dependency and strain rate, have been considered in this study. Special emphasis is focused on the evaluation of midpoint displacements and energy of models. The modeling techniques were described in details. The numerical results provide better insight into the effect of stiffener configurations on the nonlinear dynamic response of the stiffened plates subjected to uniform blast loading.

Minimum mesh design criteria for blast wave development and structural response - MMALE method

“…The simplest numerical approximations of blast loads are triangular, rectangular, or bilinear pressure-time curves, more often used in the past but also at present (Biggs (1964), Jama et al (2009), Krauthammer and Ku (1996), Louca et al (1996), Tavakoli and Kiakojouri (2014)), and in analytical methods (Biggs (1964), Jones (1997), Smith and Hetherington (1994)). More precise, build-in numerical representation of blast loads appeared when Randers-Pehrson and Bannister (1997) implemented previous work of Kingery and Bulmash (1984) (ConWep blast model Bruce and Jon (1991)) in LS-DYNA (LSTC (2013a, b)).…”

Analysis Method for Reinforcing Circular Openings in Isotropic Homogeneous Plate-Like Structures Subjected to Blast Loading

“…e radial distance r xp over which yielding occurs can be solved by substituting the known constants into (12), setting the result equal to σ Y , solving for r x , and subtracting a. Equation 12may then be substituted into (14) to obtain the concentrated peak bending moment.…”

“…Importantly, the performance of the building envelope, essentially glazing and glass facades, under air blast has been researched [7,8]. In direct relation to this paper, the dynamic behavior of metallic plate-like structures subjected to blast loading has been extensively investigated through analytical, numerical, and experimental studies [9][10][11][12][13][14][15][16][17][18]. At present, blast-resistant design is standardized in several publications including ASCE 59-11 Blast Protection of Buildings [1] and UFC 3-340-02 Structures to Resist the Effects of Accidental Explosions [19].…”

Blast Valve Design and Related Studies : A Review

“…A good agreement between numerical and experimental results was found. The dynamic response of steel stiffened plates under uniform blast loading was analysed using ABAQUS for different stiffener configurations 53 . The numerical model was verified with the published experimental results for a 50 mm thick and 1.0 m radius circular plate subjected to blast of 50 kg of TNT kept 0.5 m directly above the center of the plate.…”