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049 A shock tube used to study the dynamic response of blast-loaded plates
* 1, 2 , 3 , 3 , 1, 2 , 1, 2
1  Structural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
2  Centre for Advanced Structural Analysis (CASA), NTNU, NO-7491 Trondheim, Norway
3  European Commission, Joint Research Centre (JRC), Directorate for Space, Security and Migration, Safety and Security of Buildings Unit, Via E. Fermi 2749, I-21027 Ispra (VA), Italy


This study aims to a better understanding of the performance of a shock tube used to produce blast loading in controlled laboratory environments. Special focus is placed on the influence of the diaphragm failure process on the blast wave formation in the tube. Experimental observations are supported by numerical simulations in an attempt to obtain more insight into the underlying phenomena. It was found that the diaphragm failure process introduces a multi-dimensional flow field downstream the diaphragms. This is observed as a loss of directional energy in the distant flow field and therefore affects the reflected overpressure on blast-loaded plates located at the rear end of the tube. These findings provide important insight into how such a facility works, especially if the dynamic response of flexible plates is of interest.

Keywords: Experimental techniques; Shock tube; Airblast loading; Diaphragm failure; Blast wave formation; EUROPLEXUS