Determination of the critical distance in the procedure of explosive welding
Introduction/purpose: When performing the explosive welding procedure, for the safety of workers, it is necessary to take into account the minimum distance between the workers and the place of explosion at the time of explosion. Negligence can cause temporary hearing loss, rupture of the eardrum...
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
University of Defence in Belgrade
2020
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/cb87019e99ff44ec94605dcea5c5c074 |
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| Sumario: | Introduction/purpose: When performing the explosive welding
procedure, for the safety of workers, it is necessary to take into
account the minimum distance between the workers and the place of
explosion at the time of explosion. Negligence can cause temporary
hearing loss, rupture of the eardrum and in some cases even the death
of workers. The aim of this paper is to determine the critical distance
based on the mass of explosive charge required for explosive welding,
provided that the limit pressure is 6.9 kPa in the case of temporary
hearing loss and 35 kPa in the case of eardrum rupture. This paper
does not take into account other effects of the explosion than those
caused by the shock wave.
Methods: Depending on the type of explosion, the equivalent explosive
mass was calculated. Based on the equivalent explosive mass and the
limit pressure, the minimum distances were calculated using the
Sadovsky and Kingery-Bulmash equations.
Results: The corresponding tables show the results of the calculation
of the critical distance of workers from the place of the explosion when
there may be temporary hearing loss or rupture of the eardrum. The
calculated value of the critical explosion distance by the KingeryBulmash method, under the condition of the maximum pressure for
temporary hearing loss, is 5.62% lower than the distance value
obtained by the Sadovsky method while the value of the critical
explosion distance calculated by the Kingery-Bulmash method, under
the condition of the maximum pressure for eardrum rupture, is 7.83%
lower than the value obtained by the Sadovsky method.
Conclusion: The results of the calculation showed that the critical
distance from the explosion can be successfully calculated and that the
obtained values have small differences depending on the applied
calculation method. |
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