| 某型机枪结构动力修改预分析 |
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| 引用本文： | 董自卫,唐力伟,王瑞林,郑海起.某型机枪结构动力修改预分析[J].火炮发射与控制学报,2008(4). |
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| 作者姓名： | 董自卫 唐力伟 王瑞林 郑海起 |
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| 作者单位： | 1. 军械工程学院,火炮工程系,河北,石家庄050003;武汉军械士官学校,枪炮系,湖北,武汉430075
2. 军械工程学院,火炮工程系,河北,石家庄050003 |
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| 摘 要： | 机枪的固有振动特性是影响其射击精度的重要因素之一。采取有限元预分析辅助模态试验方案的制定，建立了基于LMS系统的模态试验系统，对某型机枪进行了模态试验，并与有限元模型计算结果进行了对比，两种方法的结果基本一致。利用机枪结构模态试验分析的结果，计算出机枪结构第一阶固有频率对质量和刚度的灵敏度，对其进行了分析并对结构修改前后枪口点的响应特性进行了仿真计算与分析。结果表明，结构修改后机枪的射向一致性更加合理。
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| 关 键 词： | 固体力学 机枪 模态试验 振动 动力学特性 灵敏度分析 |
Pretest Analysis of Dynamic Modification of a Type of Machine Gun |
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| DONG Zi-wei,TANG Li-wei,WANG Rui-lin,ZHENG Hai-qi.Pretest Analysis of Dynamic Modification of a Type of Machine Gun[J].Gun Launch & Control Journal,2008(4). |
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| Authors: | DONG Zi-wei TANG Li-wei WANG Rui-lin ZHENG Hai-qi |
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| Affiliation: | DONG Zi-wei1,2,TANG Li-wei1,WANG Rui-lin1,ZHENG Hai-qi1(1.Dep.of Gun Engineering,Ordnance Engineering College,Shijiazhuang 050003,Hebei,China,2.Dep.of Gunnery,Wuhan Ordnance Petty Officer Academy,Wuhan 430075,Hubei,China) |
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| Abstract: | The inherent vibration property of machine gun is one of the key factors that has effect on its firing accuracy.The modal experiment platform based on LMS system was established by means of FEA pretest analysis method.The modal test of a type of machine gun was performed,and its test results were compared with FEM model calculation results.The results of two methods was consistent basiclly.By use of results of some modal test and experimental analysis of machine gun,the mass and stiffness sensitivity of fir... |
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| Keywords: | solid mechanics machine gun modal experiment vibration dynamics characteristics sensitive analysis |
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