Deformation of a system of cylindrical shells under the action of an internal nonstationary pressure wave

1995 ◽  
Vol 76 (3) ◽  
pp. 2386-2390
Author(s):  
V. D. Kubenko ◽  
A. E. Babaev ◽  
V. I. Gordienko
Keyword(s):  
Pressure Wave ◽  
Cylindrical Shells

scholarly journals Nonstationary Deformation of Cylindrical shells Under a Plane Pressure Wave

2019 ◽  
Vol 1425 ◽  
pp. 012113
Author(s):  
Sagdulla Abdukadirov ◽  
Bakhtiyor Yuldoshev ◽  
Bakhtiyor Urinov ◽  
Abdurasul Nosirov
Keyword(s):  
Pressure Wave ◽  
Cylindrical Shells ◽  
Nonstationary Deformation

On the Dynamic Collapse of Cylindrical Shells Under Combined Hydrostatic and Impulsive Pressure Loadings

2013 ◽  
Author(s):  
Loureiro Silva L. ◽  
T. A. Netto
Keyword(s):  
Wave Propagation ◽  
Hydrostatic Pressure ◽  
Pressure Wave ◽  
Dynamic Pressure ◽  
Cylindrical Shells ◽  
Acoustic Medium ◽  
Water Tank ◽  
Numerical Work ◽  
Explosive Charges ◽  
Impulsive Pressure

The dynamic collapse of submerged cylindrical shells subjected to lateral impulsive pressure loads caused by underwater explosions is studied via coupled experimental and numerical work. Aluminum tubes with 50.6mm outside diameter and diameter-to-thickness ratio of 32 were tested in a 5m × 5m × 1.6mdeep water tank under various explosive charges placed at different distances. Explosive charges and standoff distances were combined so as to eventually cause collapse of the specimens. Subsequently, the parent problem of the dynamic collapse of such structures under hydrostatic pressure is also investigated to determine the collapse and propagation pressures. Additional experiments were then conducted combining hydrostatic pressure and impulsive pressure loads. In these cases, hydrostatic pressure was applied quasi-statically and kept nearly constant. Subsequently, an explosive charge was detonated inside the pressure vessel. Dynamic pressure sensors were placed in various locations in the water around the tube in order to monitor the pressure wave propagation. In both sets of experiments, dynamic pressure and strain measurements were recorded using a fit-for-purpose data acquisition system with sampling rates of up to 1 mega samples/sec per channel. The characteristics of the pressure pulses and the charges necessary to collapse the pipe under different hydrostatic pressure levels were then compared. In parallel, finite element models were developed using commercially available software to simulate underwater explosion, the pressure wave propagation, its interaction with a cylindrical shell and the subsequent onset of dynamic collapse. The surrounding fluid was modeled as an acoustic medium, the shells as J2 flow theory based materials with isotropic hardening, and proper fluid-structure interaction elements accounting for relatively small displacements of the boundary between fluid and structure were used. Finally, the physical experiments were numerically reproduced with good correlation between results.

Transient electromagnetic shielding in a system of two coaxial cylindrical shells

1991 ◽  
Vol 138 (5) ◽  
pp. 281 ◽  
Author(s):  
C.S. Antonopoulos ◽  
S.M. Panas ◽  
E.E. Kriezis
Keyword(s):  
Cylindrical Shells ◽  
Electromagnetic Shielding ◽  
Transient Electromagnetic

Thermoelastic Behavior of Circular Cylindrical Shells Subjected to Radiant Heating from One Direction

1970 ◽  
Vol 18 (201) ◽  
pp. 365-373
Author(s):  
Tsuyoshi SEKIYA ◽  
Seinosuke SUMI ◽  
Ippei SUGIMOTO ◽  
Masayoshi NISHIOKA
Keyword(s):  
Cylindrical Shells ◽  
Radiant Heating ◽  
Circular Cylindrical Shells

Numerical and experimental investigation on internal membrane pressure wave inside sealed structure

2013 ◽  
Vol 61 (3) ◽  
pp. 613-621 ◽  
Author(s):  
W. Barnat
Keyword(s):  
Experimental Investigation ◽  
Pressure Wave ◽  
Pressure Increase ◽  
Internal Organs ◽  
Pressure Impulse ◽  
Internal Membrane ◽  
Contaminated Area

Abstract The article presents an approach to modeling the internal membrane pressure wave inside a sealed structure. During an explosion near a vehicle when a pressure wave reaches a hull, a pressure wave inside arises due to the hull’s bottom and the deformation of sides. They act like the piston - membrane. This membrane transfers the pressure impulse into the vehicle’s interior. A pressure increase causes the damage of internal organs or even death of occupants. In case of an armor penetration the pressure increase may be even larger. One of basic methods to protect a crew is to open hatches. However, such a method cannot be used in a contaminated area.

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