以某型转管机枪为研究对象,为了分析解决该型机枪在样机试验中出现的机心头断裂、机心卡死以及闭锁开锁时接触面强度不足等故障现象,首先对机心部件开闭锁过程进行了受力分析;其次利用多体动力学分析软件建立了机枪系统的动力学模型,重点对机心运动过程进行了动力学计算;然后利用有限元分析软件建立了机心部件运动过程中的动态应力与位移分析模型,在满足机枪射频要求的前提下,得出开闭锁过程中接触面关键位置的应力与位移的变化曲线;最后综合研究分析得到的动力学响应特性和应力、位移云图,分析找出引发故障的根本原因,对机心头进行了结构改进,有效提高了机枪的射击可靠性,为机心部件的优化改进提供了理论依据与试验指导。
Abstract
To analyze and solve the breakdown of a certain Gatling gun in prototype experiment such as bolt fracture, core seizing and insufficient strength of interface while locking and unlocking, firstly the bolt forces in the lock-unlock process were analyzed; secondly, the dynamic model of Gatling gun system was established by means of multi-body dynamics software and the bolt movement process was calculated; thirdly, the dynamic stress and displacement analysis model was built using the finite element software, and then the stress and displacement curves of the key interface positions in the bolt lock-unlock process were obtained under the fire frequency demand; finally, the fault causes were found out by synthesizing the response characters, stress and displacement nephograms, and the bolt structure was improved which effectively increases shooting reliability and provides the theory basis and test direction for optimizing the bolt assembly.
关键词
转管机枪 /
机心部件 /
动力学仿真 /
有限元
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Key words
Gatling gun /
bolt assembly /
dynamic simulation /
finite element
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参考文献
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脚注
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