Method of determination of safety zones when disposal of aviation devices

Ihor Neklonskyі

National University of Civil Defence of Ukraine

http://orcid.org/0000-0002-5561-4945

Oleg Smirnov

National University of Civil Defence of Ukraine

https://orcid.org/0000-0002-1237-8700

DOI: https://doi.org/10.52363/2524-0226-2021-33-10

Keywords: aerial bombs, disposal technology, radius of destruction, fragment flow density

Abstract

The necessity of development of highly effective technology of aviation bombs utilization and a way of definition of safety zones at utilization of the corresponding aircraft means of destruction is proved. To solve this problem, it was used a systematic approach, in which scientific methods of generalization and comparison, analysis and synthesis, methods of mathematical modeling are used. To substantiate effective solutions to ensure safe conditions for the organization of work, a method for determining safety zones for the disposal of aircraft damage has been proposed. The method allows to take into account the high-explosive and fragmentation action of aircraft means of destruction during their detonation. To estimate the degree of damage to objects, generalized empirical data corresponding to the laws of damage are used, which are presented as the dependence of the probability of damage on the parameters characterizing the effect, – overpressure at the shock wave front, specific shock wave pulse. The statement that overpressure and specific impulse are functions of the mass of the energy carrier (explosive) and the distance to the center of the explosion is practically realized. This allows us to move from the parametric law of defeat to the coordinate law of defeat. The transition from calculations to a graphic image is carried out using relations that relate the parameters of the blast wave with the values of distance and TNT equivalent. The calculations take into account the possibility of damage to objects (people) from the action of flying debris. For this purpose the law of a fragment on a trajectory speed change is used. Based on the calculations of the parameters of action zones of dangerous factors of aviation bombs explosion, the corresponding conclusions were made regarding the characteristics of the safety zones during the disposal of aircraft damage. The proposed method for determining safety zones implements a mathematical apparatus that allows to relate the energy to TNT equivalent, and can be used as a conservative estimate for rapid analysis of the stability of objects, provided they are located in the middle and far zones from the source of the explosion..

References

1. Ferreira, C., Ribeiro, J., Clift, R., & Freire, F. (2019). A Circular Economy Approach to Military Munitions: Valorization of Energetic Material from Ammunition Disposal through Incorporation in Civil Explosives. Sustainability, 11(1), 1–14. doi: 10.3390/su11010255
2. Liu, H. Wang, Y., Zhu, H. (2015). The technology method research of scrap ammunition destruction, 3rd International Conference on Mechanical Engineering and Intelligent Systems (ICMEIS 2015). Atlantis Press, 201–205. doi:10.2991/icmeis-15.2015.39
3. Drobakha, Hr., Neklonskyi, I., Kateshchenok, A., Sobyna, V., Taraduda, D., Borysova, L., & Lysachenko, I. (2019). Structural and functional simulation of interaction in the field of aviation safety by using matrices. Archives of Materials Science and Engineering, 95, 2, 67–76. Retrieved from http://repositsc.nuczu. edu.ua /handle/ 123456789/9000
4. Neklonskyi, I. M., Smyrnov, O. M. (2020). Matematychna model protsesu utylizatsii taktychnykh raket 9M21. Problemy nadzvychainykh sytuatsii, 1(31), 211–225. Retrieved from http://repositsc.nuczu.edu.ua/handle/123456789/11794
5. United Nations Office for Disarmament Affairs. (2015). International ammunition technical guideline IATG 10.10:2015 [E]. Demilitarization and destruction of conventional ammunition. New York : USA. Retrieved from https://s3.amazonaws.com/unoda-web/wp-content/uploads/2019/05/IATG-10.10-Demilitarization-and-Destruction-V.2.pdf
6. Karlos, V., & Solomos, G. (2013). Calculation of Blast Loads for Application to Structural Components. Luxembourg: Publications Office of the European Union. doi:10.2788/61866
7. Solomos, G., Larcher, M., Valsamos, G., Karlos, V., & Casadei, F. (2020). A survey of computational models for blast induced human injuries for security and defence applications : JRC Technical Reports. Ispra : European Commission. doi:10.2760/685
8. Valsamos, G., Casadei, F., Larcher, M., & Solomos, G. (2015). Implementation of Flying Debris Fatal Risk Calculation in EUROPLEXUS. Luxembourg: Publications Office of the European Union. doi:10.2788/058640
9. Larcher, M., Casadei F., & Solomos, G. (2014). Simulation of blast waves by using mapping technology in EUROPLEXUS. Publications Office of the European Union. doi: 10.2788/98310
10. Costin, N. S. (2014). The explosive atmosphere conditions required to carry out an improvised explosive device and numerical simulation of detonation. Revista Academiei Fortelor Terestre, 1(73), 132–137. Retrieved from https://www.armyacademy.ro/reviste/rev1_2014/NICULAE.pdf