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Keywords: soil-structure interaction, variational difference method, Godunov method, coupled method, shock wave diffraction, lined cavity, rigid inclusion.

Summary

The paper presents a coupled two-dimensional Godunov - variational difference approach for the soil-rigid inclusion-lined structure interaction due to a nearby explosion including the process of soil-structure and soil-inclusion contact conditions with a transient separation. The Godunov method has been applied to blast dynamics of elastic plastic medium (soil) with irreversible bulk compaction.

To couple the Godunov (for the soil) and variational-difference (for the lining) methods the system of equation for the contact pressure calculations has been constructed for the soil-structure and soil-inclusion sliding contact. This system of equations includes the relationships for the shock or the rarefaction waves in soil and equations of the shell's motion. The equations are solved using a simple iteration method. At every iteration of the solution process the self-similar symmetric Riemann problem is solved.

The proposed approach is demonstrated in the solution of a buried explosion in the proximity of a rigid lining of a buried tunnel in a soil medium, with irreversible bulk and deviatoric strains as well as in the solution of the flexible lining behavior due to a nearby explosion when a small rigid inclusion is located between the explosive cavity and the lining.

It was shown that the inclusion may either improve or worsen the lining state depending on the distance from the lining front point to the inclusion. It was also demonstrated that the maximum peak pressure envelopes along the front part of the inclusion at all times for the case of a short standoff distance to an explosive cavity is located somewhat away from the lining axis of symmetry.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 89 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY Edited by: M. Papadrakakis and B.H.V. Topping Paper 166 Analysis of Explosion Induced Shock Waves Interaction with an Underground Lined Tunnel by the Coupled Godunov-Variational Difference Approach Y.S. Karinski, V.R. Feldgun and D.Z. Yankelevsky National Building Research Institute, Technion-IIT, Haifa, Israel doi:10.4203/ccp.89.166 purchase the full-text of this paper Full Bibliographic Reference for this paper Y.S. Karinski, V.R. Feldgun, D.Z. Yankelevsky, "Analysis of Explosion Induced Shock Waves Interaction with an Underground Lined Tunnel by the Coupled Godunov-Variational Difference Approach", in M. Papadrakakis, B.H.V. Topping, (Editors), "Proceedings of the Sixth International Conference on Engineering Computational Technology", Civil-Comp Press, Stirlingshire, UK, Paper 166, 2008. doi:10.4203/ccp.89.166 Keywords: soil-structure interaction, variational difference method, Godunov method, coupled method, shock wave diffraction, lined cavity, rigid inclusion. Summary The paper presents a coupled two-dimensional Godunov - variational difference approach for the soil-rigid inclusion-lined structure interaction due to a nearby explosion including the process of soil-structure and soil-inclusion contact conditions with a transient separation. The Godunov method has been applied to blast dynamics of elastic plastic medium (soil) with irreversible bulk compaction. To couple the Godunov (for the soil) and variational-difference (for the lining) methods the system of equation for the contact pressure calculations has been constructed for the soil-structure and soil-inclusion sliding contact. This system of equations includes the relationships for the shock or the rarefaction waves in soil and equations of the shell's motion. The equations are solved using a simple iteration method. At every iteration of the solution process the self-similar symmetric Riemann problem is solved. The proposed approach is demonstrated in the solution of a buried explosion in the proximity of a rigid lining of a buried tunnel in a soil medium, with irreversible bulk and deviatoric strains as well as in the solution of the flexible lining behavior due to a nearby explosion when a small rigid inclusion is located between the explosive cavity and the lining. It was shown that the inclusion may either improve or worsen the lining state depending on the distance from the lining front point to the inclusion. It was also demonstrated that the maximum peak pressure envelopes along the front part of the inclusion at all times for the case of a short standoff distance to an explosive cavity is located somewhat away from the lining axis of symmetry. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £95 +P&P)
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