基于轻气炮加载的火工冲击环境模拟技术研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (22) : 1-10.

论文

赵宏达1,2，孙毅1，丁继锋3，郝志伟4，刘伟1，王熊1，刘一志1

作者信息 +

Simulation techniques of pyroshock environment under the excitation of a light gas gun

ZHAO Hongda1,2，SUN Yi1，DING Jifeng3，HAO Zhiwei4，LIU Wei1，WANG Xiong1，LIU Yizhi1

Author information +

文章历史 +

摘要

针对机械撞击式火工冲击环境试验中需要反复调试以实现试验条件等问题，提出了一种机械撞击式冲击环境模拟装置并研究了装置的调节参数对冲击环境的影响规律。设计了一套采用轻气炮加载并具有多调节参数的冲击环境模拟装置。采用冲击试验和数值仿真相结合研究了装置的调节参数，如轻气炮气室压强、连接杆定位孔位置、加载板厚度等对设备安装板上的冲击响应谱（Shock Response Spectrum, SRS）的影响规律。拟合了冲击环境与调节参数之间的定量的关系式或总结了相应的表格。通过火工冲击信号在该装置上进行准确模拟验证了装置的可行性和研究规律的可靠性。研究表明：轻气炮气室压强与谐振板冲击响应谱幅值近似成幂次方关系，连接杆定位孔和加载板厚度可实现冲击响应谱拐点频率的大范围调节等。

Abstract

In order to overcome the problem of repeated debugging process in pyroshock tests of mechanical impact, a simulation platform is presented and the effect rules of its adjustable parameters on the pyroshock environment are researched. A simulation platform, which is excited by light gas gun and has multiple parameters, is designed. The shock tests and numerical methods are combined to investigate the effect rules of adjustable parameters, such as the pressure of the gas chamber, the positions of the connectors, the thickness of the loading board, on the Shock Response Spectrum (SRS) of the plate that the device is mounted. At the same time, the quantitative relationship between the pyroshock environment and the adjustable parameters are fitted or the corresponding tables are summarized. The practicability of the platform and the reliability of the effect rules are verified through a typical pyroshock signal. The researches indicate that the relationship between the pressures of the gas chamber has an effect of power-law approximately on the amplitudes of the SRS of the resonant plate, and the combination of the positions of connectors and loading plate thickness can realize the adjustment of knee frequency in large range.

导出引用

赵宏达1,2，孙毅1，丁继锋3，郝志伟4，刘伟1，王熊1，刘一志1. 基于轻气炮加载的火工冲击环境模拟技术研究[J]. 振动与冲击, 2021, 40(22): 1-10

ZHAO Hongda1,2，SUN Yi1，DING Jifeng3，HAO Zhiwei4，LIU Wei1，WANG Xiong1，LIU Yizhi1. Simulation techniques of pyroshock environment under the excitation of a light gas gun[J]. Journal of Vibration and Shock, 2021, 40(22): 1-10

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