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A fast and accurate model for the creation of explosion fragments with improved fragment shape and dimensions

Defence Technology（防务技术） 2022年第2期18卷 159-169页

作者： David Felix ian colwill Paul Harris School of Computing Engineering&MathematicsUniversity of BrightonBrightonUK Engineering and Design(Alumni) University of SussexBrightonUK

Explosion models based on Finite Element Analysis(FEA)can be used to simulate how a warhead *** their execution times are *** protection systems need to make very fast predictions,before a fast attacking weapon hits the *** execution times are also needed in real time simulations where the impact of many different computer models is being ***,FEA explosion models are not appropriate for these real-time *** research presented in this paper delivers a fast simulation model based on Mott’s equation that calculates the number and weight of fragments created by an *** addition,the size and shape of fragments,unavailable in Mott’s equation,are calculated using photographic evidence and a distribution of a fragment’s length to its *** model also identifies the origin of fragments on the warhead’s *** results are verified against experimental data and a fast execution time is achieved using uncomplicated simulation *** developed model then can be made available for real-time simulation and fast computation.

关键词： Distribution of fragments Fragment shape Real-time simulation Cylindrical explosion

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Real-time calculation of fragment velocity for cylindrical warheads

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Defence Technology（防务技术） 2019年第3期15卷 264-271页

作者： David Felix ian colwill Elias Stipidis Institution of Engineering and Technology Stevenage England Member of British Computer Society London Institute of Electrical and Electronics Engineers London

To simulate explosion fragments, it is necessary to predict many variables such as fragment velocity, size distribution and projection angle. For active protection systems these predictions need to be made very quickly, before the weapon hits the target. Fast predictions also need to be made in real time simulations when the impact of many different computer models need to be assessed. The research presented in this paper focuses on creating a fast and accurate estimate of one of these variables - the initial fragment velocity. The Gurney equation was the first equation to calculate initial fragment velocity. This equation, sometimes with modifications, is still used today where finite element analysis or complex mathematical approaches are considered too computationally expensive. This paper enhances and improves Breech’s two-dimensional Gurney equation using available empirical data and the principals of conservation of momentum and energy. The results are computationally quick, providing improved accuracy for estimating initial fragment velocity. This will allow the developed model to be available for real-time simulation and fast computation, with improved accuracy when compared to existing approaches.

关键词： Initial fragment velocity Real-time simulation Cylindrical explosion

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维普期刊数据库

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Combat utility prediction

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Defence Technology（防务技术） 2016年第6期12卷 446-463页

作者： Stanislas GABROVSEK ian colwill Elias STIPIDIS Vetronics Research Centre University of Brighton

The majority of allied casualties from recent conflicts were caused by blast wave and fragments perforation damage from Improvised Explosive Devices. Survivability to this type of threat is a critical factor to consider for land platform design. This paper proposes an original approach to platform survivability assessment using a combination of Agent-Based(AB) simulation and Fault Tree Analysis(FTA) to predict the consequences of IED fragment impacts on the platform operational status. As a demonstration, this approach is applied to the comparison of different platform architectures to gain insight into the optimisation of the platform component topology.

关键词： Mission Survivability Simulation Agent-based Fault-tree analysis Platform architecture

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维普期刊数据库

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A fast and accurate model for the creation of explosion fragments with improved fragment shape and dimensions

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Defence Technology 2022年第2期

作者： David Felix ian colwill Paul Harris

来源：博看期刊评论

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