TY - GEN
T1 - Temporal and spatial pressure distribution of characteristics cylindrical shell structure under external surface burst explosion
AU - Qi, Shaobo
AU - Zhi, Xudong
AU - Fan, Feng
N1 - Publisher Copyright:
© 13th International Conference on Shock and Impact Loads on Structures, SILOS 2019. All Rights Reserved.
PY - 2019
Y1 - 2019
N2 - Cylindrical shell structure, as a common structural shape in civil engineering, is widely used in military and civil infrastructure for protecting personnel, valuable equipment, and important resources. As these structures bear on people's livelihood and national security, they could easily become the targets of terrorist attacks, military attacks and chemical accidents. Predicting and assessing the damage degree that could be caused by a blast wave requires knowledge of the dynamic load imposed on the structure. Thus, studying the blast load has become the precondition of the work for achieving disaster prevention and reduction. Numerous empirical formulae and design manual are available in the literature to estimate the blast loading on an infinite plane target. Also, UFC-3-340-02 and previous studies only consider the blast effects on a rectangular structure positioned above the ground surface. Obviously, previous studies have assumed that the reflector is an ideal infinite or finite sized flat surface. However, cylindrical shell structure has a sharp curvature, which results in a complicated and variable incidence angle all over the whole structure under surface burst explosion. There is very less research work has been done to describe the blast wave propagation process on this type of structure. In this work, the wave diffraction behaviour on a cylindrical structure under surface burst explosion was investigated. Firstly, a numerical model based on the commercial software ANSYS/AUTODYN was developed and validated by relevant experimental results. Secondly, the influence of explosive and structural parameters on temporal and spatial overpressure distribution characteristics of cylindrical shell structure are discussed by parametric analysis. In addition, the performances of the Mach effect, reflected effect, shielding effect and clearing effect on the cylindrical shell were studied. The conclusion has a reference value for optimization design for cylindrical shell structure under explosion.
AB - Cylindrical shell structure, as a common structural shape in civil engineering, is widely used in military and civil infrastructure for protecting personnel, valuable equipment, and important resources. As these structures bear on people's livelihood and national security, they could easily become the targets of terrorist attacks, military attacks and chemical accidents. Predicting and assessing the damage degree that could be caused by a blast wave requires knowledge of the dynamic load imposed on the structure. Thus, studying the blast load has become the precondition of the work for achieving disaster prevention and reduction. Numerous empirical formulae and design manual are available in the literature to estimate the blast loading on an infinite plane target. Also, UFC-3-340-02 and previous studies only consider the blast effects on a rectangular structure positioned above the ground surface. Obviously, previous studies have assumed that the reflector is an ideal infinite or finite sized flat surface. However, cylindrical shell structure has a sharp curvature, which results in a complicated and variable incidence angle all over the whole structure under surface burst explosion. There is very less research work has been done to describe the blast wave propagation process on this type of structure. In this work, the wave diffraction behaviour on a cylindrical structure under surface burst explosion was investigated. Firstly, a numerical model based on the commercial software ANSYS/AUTODYN was developed and validated by relevant experimental results. Secondly, the influence of explosive and structural parameters on temporal and spatial overpressure distribution characteristics of cylindrical shell structure are discussed by parametric analysis. In addition, the performances of the Mach effect, reflected effect, shielding effect and clearing effect on the cylindrical shell were studied. The conclusion has a reference value for optimization design for cylindrical shell structure under explosion.
KW - Clearing effect
KW - Cylindrical shell structure
KW - Parametric analysis
KW - Surface burst explosion
KW - Wave diffraction behaviour
UR - http://www.scopus.com/inward/record.url?scp=85091704703&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85091704703
T3 - 13th International Conference on Shock and Impact Loads on Structures, SILOS 2019
SP - 401
EP - 410
BT - 13th International Conference on Shock and Impact Loads on Structures, SILOS 2019
A2 - Ren, Fengming
A2 - Wu, Chengqing
A2 - Lok, Tat Seng
PB - CI-Premier Pte Ltd
T2 - 13th International Conference on Shock and Impact Loads on Structures, SILOS 2019
Y2 - 14 December 2019 through 15 December 2019
ER -
