Dynamic loss of stability of an instantaneously compressed layered cylindrical shell

1980 ◽  
Vol 16 (7) ◽  
pp. 586-590 ◽  
Author(s):  
D. V. Babich ◽  
L. P. Khoroshun
Keyword(s):  
Cylindrical Shell ◽  
Loss Of Stability ◽  
Layered Cylindrical Shell ◽  
Dynamic Loss

Dynamic thermo-elastic response of a discrete multi-layered cylindrical shell subjected to transient thermal loading

2008 ◽  
Vol 222 (4) ◽  
pp. 549-561 ◽  
Author(s):  
J Y Zheng ◽  
X D Wu ◽  
Y J Chen ◽  
G D Deng ◽  
Q M Li ◽  
...  
Keyword(s):  
Cylindrical Shell ◽  
Boundary Conditions ◽  
Thermal Loading ◽  
Elastic Response ◽  
Elastic Part ◽  
Dynamic Part ◽  
Layered Cylindrical Shell ◽  
Stress Boundary Conditions ◽  
Transient Thermal ◽  
Stress Boundary

Explosion containment vessels (ECVs) are used to fully contain the effects of explosion events. A discrete multi-layered cylindrical shell (DMC) consisting of a thin inner cylindrical shell and helically cross-winding flat steel ribbons has been proposed, which has obvious advantages of fabrication convenience and low costs. The applications of ECVs are closely associated with blast and thermal loads, and thus, it is important to understand the response of a DMC under transient thermal load in order to develop a design code and operation procedures for the use of DMC as ECV. In this paper, a mathematical model for the elastic response of a DMC subjected to thermal loading due to rapid heating is proposed. Based on the axisymmetric plane strain assumption, the displacement solution of the dynamic equilibrium equations of both inner shell and outer ribbon layer are decomposed into two parts, i.e. a thermo-elastic part satisfying inhomogeneous stress boundary conditions and a dynamic part for homogeneous stress boundary conditions. The thermo-elastic part is solved by a linear method and the dynamic part is determined by means of finite Hankel transform and Laplace transform. The thermo-elastic solution of a DMC is compared with the solution of a monobloc cylindrical shell, and numerical results are presented and discussed in terms of winding angle and material parameters.

Analysis of Straight-Line Motion of Towed Ships

1991 ◽  
Vol 35 (04) ◽  
pp. 304-313
Author(s):  
Fotis Andrea Papoulias
Keyword(s):  
Dynamic Response ◽  
Periodic Solutions ◽  
Bifurcation Theory ◽  
Loss Of Stability ◽  
Nonlinear Analyses ◽  
Surface Ship ◽  
Numerical Integrations ◽  
Straight Line ◽  
Linear And Nonlinear ◽  
Dynamic Loss

The problem of dynamic loss of stability in steady towing of a surface ship is considered. The two coordinates of the towing point and the towline length are the main bifurcation parameters. Bifurcation theory techniques are used in order to compute equilibrium and periodic solutions. The results are confirmed by numerical integrations. It is shown that both linear and nonlinear analyses are required to thoroughly understand, predict, and evaluate the system dynamic response.

Dynamic loss of stability in depth control of submersible vehicles

1995 ◽  
Vol 17 (4) ◽  
pp. 205-216 ◽  
Author(s):  
Fotis A. Papoulias ◽  
Craig A. Bateman ◽  
Selcuk Ornek
Keyword(s):  
Loss Of Stability ◽  
Depth Control ◽  
Dynamic Loss

Stability and Bifurcations of Towed Underwater Vehicles in the Dive Plane

1992 ◽  
Vol 36 (03) ◽  
pp. 255-267
Author(s):  
Fotis A. Papoulias
Keyword(s):  
Design Methodology ◽  
Vertical Plane ◽  
Singularity Theory ◽  
Underwater Vehicles ◽  
Loss Of Stability ◽  
Bifurcation Diagrams ◽  
Cable Dynamics ◽  
Straight Line ◽  
Stability And Bifurcations ◽  
Dynamic Loss

The problem of static and dynamic loss of stability in the vertical plane in steady towing of underwater vehicles is considered. Bifurcations of steady-state equilibria are studied using singularity theory techniques and all qualitatively different bifurcation diagrams that occur locally are revealed. Analytical conditions for stability of straight-line motion are derived. Bifurcations to periodic solutions are analyzed and shown to provide paths to complicated dynamics. The incorporation of the techniques used in this work, with related studies in cable dynamics, can lead to a design methodology for safer and more efficient operations.

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