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1. 南京理工大学 机械工程学院, 江苏 南京 210094
2. 南京工程学院 机械工程学院, 江苏 南京 211167
Received:25 July 2024,
Published Online:26 November 2024,
Published:30 November 2024
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Ye TIAN, Guangsong CHEN, Taisu LIU. Wear Characteristics of Coordinated Ammunition Ramming Mechanism in Automatic Ammunition Loading System for Artillery[J]. Acta Armamentarii, 2024, 45(11): 4062-4070.
Ye TIAN, Guangsong CHEN, Taisu LIU. Wear Characteristics of Coordinated Ammunition Ramming Mechanism in Automatic Ammunition Loading System for Artillery[J]. Acta Armamentarii, 2024, 45(11): 4062-4070. DOI: 10.12382/bgxb.2024.0634.
在自动装填系统中
协调输弹机构是完成弹丸转运的重要组成部分。由于协调输弹机构长期处于发射冲击的载荷作用之下
导致协调器运动副轴孔之间由于磨损作用出现间隙变化
影响协调输弹的精度
研究协调输弹机构运动磨损问题对提高机构运动可靠性具有重要意义。为了研究协调输弹机构的磨损特性
基于修正Archard磨损模型建立协调输弹机构磨损数学模型并通过实验获得磨损系数;建立协调输弹机构动态响应有限元仿真模型并通过实验数据验证其有效性;利用有限元仿真结合任意朗格朗日-欧拉(Arbitrary Lagrangian-Eulerian
ALE)自适应网格技术实现磨损过程仿真
从而获得协调输弹机构的磨损特性
包括磨损深度与磨损循环次数的关系、最大磨损深度出现的位置等。研究结果表明:磨损开始初期磨损剧烈
在大约350次协调输弹后磨损由剧烈磨损期转而进入平稳期
磨损率下降;随着磨损的继续进行磨损率持续下降
且在整个磨损过程中轴孔接触边缘比其他位置磨损深度更大。
The coordinated ammunition ramming mechanism in the automatic ammunition loading system is an important part to complete the ammunition transfer. Due to the long-term impact loads during firings
the countershaft holes of the coordinated ammunition ramming mechanism experience wear-induced clearance variations
affecting the accuracy of ammunition coordination. Studying the wear of the coordinated ammunition ramming mechanism is crucial for enhancing its reliability. To investigate the wear characteristics of the coordinated ammunition ramming mechanism
a mathematical model based on the modified Archard wear model is developed
and the wear coefficient is determined through experiments. A finite element simulation model for the mechanism’s dynamic response is established and validated using experimental data. The finite element simulation and the Arbitrary Lagrangian-Eulerian (ALE) adaptive grid technology are used to simulate the wear process
revealing the mechanism’s wear characteristics
such as the relationship between wear depth and cycle count
and the location of maximum wear. The results indicate that the initial wear is intense. After approximately 350 coordinated ammunition transfers
the wear transits from intense to steady
with the wear rate decreasing as the wear process continues. Wear at the contact edge of shaft hole is more pronounced than elsewhere throughout the wear process.
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王明明 , 钱林方 , 陈光宋 , 等 . 基于概率密度演化方法的火炮输弹过程不确定性分析 [J ] . 兵工学报 , 2022 , 43 ( 6 ): 1215 - 1224 . DOI: 10.12382/bgxb.2021.0298 http://doi.org/10.12382/bgxb.2021.0298 为分析火炮输弹过程不确定性参数对输弹一致性的影响,提出基于概率密度演化理论的输弹过程不确定性分析方法。建立某火炮输弹机的ADAMS动力学模型,根据概率密度守恒原理推导输弹过程的广义概率密度演化方程,以弹丸状态变量和输弹过程随机参数的联合概率密度函数建立状态空间与概率空间之间的联系。根据物理状态的演变引出概率密度的演化,并基于Lax-Wendroff格式的有限差分法求解输弹响应的概率密度函数。与文献[20]试验结果对比,输弹ADAMS 动力学模型的仿真位移曲线与试验数据基本吻合,验证了模型的准确性;分析了不同工况下参数不确定性对弹丸响应的影响,得到了响应均方差。结果表明:与蒙特卡洛(MC)方法的结果对比,该方法计算的响应概率密度函数在形式与精度上都比较准确,验证了该方法的适用性;随着输弹角的增大,响应的波动范围扩大。
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