Research on autocannon firing dispersion based on bond space method

IF 2.8 3区 工程技术 Q2 MECHANICS International Journal of Non-Linear Mechanics Pub Date : 2024-08-23 DOI:10.1016/j.ijnonlinmec.2024.104876
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Abstract

This paper is devoted to constructing a dynamic numerical model for the firing dispersion caused by the autocannon dynamic characteristics. The buffer dynamics and projectile-barrel coupling are considered. First, the simulation of autocannon firing dispersion using commercial software usually leads to expensive computational costs. Second, autocannon dynamic design includes multiple subsystem models with nonlinearities. The conventional design method makes it difficult to describe the dynamic response of such complex systems with a unified model. To end these, a dynamic junction bond space method is proposed for analyzing muzzle vibration and firing dispersion under continuous firing loads, where the gene expression programming (GEP) method is adopted to construct the surrogate model for the buffer flow field. For the coupling analysis of the projectile and barrel, the projectile load is applied at a moving junction, which coincides with the flexible node of the barrel. By this, the dynamic numerical model for autocannon firing dispersion is established, and then the system state equation is obtained for each time step. Moreover, an autocannon standing target shooting example is presented to demonstrate the validity of the proposed method; the results show that the firing dispersion from the bond space model is consistent with the test.

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基于结合空间法的自动炮射击散布研究
本文致力于为自动火炮动态特性引起的发射散射构建动态数值模型。其中考虑了缓冲器动力学和弹丸-炮管耦合。首先,使用商业软件模拟自动榴弹炮的发射散布通常会导致昂贵的计算成本。其次,自动火炮动态设计包括多个非线性子系统模型。传统的设计方法难以用统一的模型来描述这种复杂系统的动态响应。为此,本文提出了一种动态交界键空间方法,用于分析连续发射载荷下的炮口振动和发射散布,其中采用了基因表达编程(GEP)方法来构建缓冲流场的代用模型。在弹丸和枪管的耦合分析中,弹丸载荷施加在移动交界处,该交界处与枪管的柔性节点重合。由此,建立了自动火炮发射散布的动态数值模型,并得到了每个时间步的系统状态方程。此外,为了证明所提方法的有效性,还给出了一个自动火炮立靶射击实例;结果表明,结合空间模型得出的射击离散度与测试结果一致。
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来源期刊
CiteScore
5.50
自引率
9.40%
发文量
192
审稿时长
67 days
期刊介绍: The International Journal of Non-Linear Mechanics provides a specific medium for dissemination of high-quality research results in the various areas of theoretical, applied, and experimental mechanics of solids, fluids, structures, and systems where the phenomena are inherently non-linear. The journal brings together original results in non-linear problems in elasticity, plasticity, dynamics, vibrations, wave-propagation, rheology, fluid-structure interaction systems, stability, biomechanics, micro- and nano-structures, materials, metamaterials, and in other diverse areas. Papers may be analytical, computational or experimental in nature. Treatments of non-linear differential equations wherein solutions and properties of solutions are emphasized but physical aspects are not adequately relevant, will not be considered for possible publication. Both deterministic and stochastic approaches are fostered. Contributions pertaining to both established and emerging fields are encouraged.
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