Experimental investigations of the interaction of shock waves in soils containing obstacles

Kochetkov

International Journal of Impact Engineering

et al. 2008

Section: Comparison With Experimental Data: Soil-obstacle Interactionmentioning

confidence: 95%

“…To examine the above coupled procedure, a comparison with available experimental results [51] of contact pressures under blast action has been carried out. The planar blast loading is obtained from an explosion of a planar TNT charge resting on the soil top surface.…”

Section: Comparison With Experimental Data: Soil-obstacle Interactionmentioning

confidence: 99%

Blast response of a lined cavity in a porous saturated soil

Kochetkov

International Journal of Impact Engineering

et al. 2008

“…The numerical analysis refers to a 1D model (plane wave), and therefore the plate width is assumed to be infinite. Reference [36] does not provide information concerning the charge thickness and obstacle depth. Hence, in our solution procedure, we adopted the measured pressure signal on the plate's top surface (line 1- Figure 7) and calculated the corresponding contact pressure at the rear plate-soil interface (line 2- Figure 7).…”

Section: Comparison With Experimental Data: Soil-obstacle Interactionmentioning

confidence: 98%

“…To examine the above coupled procedure, a comparison is made with available experimental results of contact pressures under blast action in a porous medium [36]. The planar blast loading is obtained from an explosion of a planar TNT charge resting on the soil-top surface.…”

Section: Comparison With Experimental Data: Soil-obstacle Interactionmentioning

confidence: 99%

Explosion‐induced dynamic soil–structure interaction analysis with the coupled Godunov–variational difference approach

Numerical Meth Engineering

Yankelevsky

2008

SUMMARYThe paper presents a coupled 2D Godunov-variational difference approach for soil-structure interaction due to a nearby explosion. Owing to the high-intensity dynamic loads, complex processes take place, including transient separation of the buried structure from the surrounding soil, large deformations of the buried structure including loss of stability, and so on. The approach takes into account the irreversible bulk compaction of the soil medium and is based on the relationships of the shock and rarefaction waves with finite-difference equations of the shell motion, using a simple iteration method. The model reduces the contact problem to the self-similar symmetric Riemann problem.The proposed approach is demonstrated by the solution of a buried explosion in the proximity of a lined tunnel buried in soil. The peak contact pressure envelope along the lining was studied. It was found that for an explosion in the proximity of a relatively rigid shell, the maximum value of this envelope is located at some distance from the lining's axis of symmetry.

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“…In this experiment, the obstacle velocity as well as the contact pressure in the front and behind the plate had been measured. The distance of the obstacle from the charge has not been indicated in the referred paper [61], therefore the solution procedure adopted the measured pressure signal on the plate top surface (line 1; Figure 10) and calculated the contact pressure at the rear plate-soil interface (line 2; Figure 10). Also, the velocity time history of the plate's center of mass u ξ (t)was predicted (line 3; Figure 10).…”

Section: Comparison With Experimental Data: Soil-obstacle Interactionmentioning

confidence: 99%

Riemann solver for irreversibly compressible three-phase porous media

Int. J. Numer. Anal. Meth. Geomech.

Yankelevsky

2013