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工程力学  2012 

超空泡射弹尾拍结构动力学响应分析

DOI: 10.6052/j.issn.1000-4750.2011.03.0157, PP. 370-374

Keywords: 超空泡射弹,尾拍,动力学响应,有限元法,加强筋

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Abstract:

超空泡射弹在运动过程中存在尾拍现象,导致结构发生振动,影响射弹的弹道稳定性,降低射弹结构的可靠性。该文建立了射弹无约束动力学方程,使用有限元法求解得到了超空泡射弹在尾拍载荷作用下的动力学响应,并对射弹的加固模型进行了分析,给出了环状加强筋个数、直径以及间距对降低射弹振幅效果的影响。研究结果表明:超空泡射弹在尾拍运动过程中转动周期和幅值随加强筋个数的增大而增大;射弹头部的弹性振动幅值随加强筋个数和直径的增大而减小,振动周期亦随加强筋个数的增大而减小;加强筋距离的减小,对于降低射弹中部振幅效果明显,但对射弹头部的振动几乎没有影响。

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