基于累积损伤的弹载记录仪寿命评估
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摘要
针对目前弹载记录仪只能依靠经验判断使用寿命的问题,提出了基于累积损伤的弹载记录仪在高冲击下的寿命评估方法。该方法通过分析弹载记录仪的失效机理与失效模式,提出记录仪的失效判定依据,利用ANSYS/LS-DYNA软件建立有限元模型,仿真记录仪在连续加速度冲击载荷下的抗冲击次数,并拟合得到加速度-寿命预测曲线,最后,通过落锤试验对预测曲线进行验证。仿真验证结果表明,冲击加速度载荷与弹载记录仪的寿命近似成负指数关系,落锤试验结果与寿命预测曲线具有较好的一致性。
In view of the fact that the missile-borne recorder can only rely on experience to judge the service life, a method for estimating the life of an ambulatory recorder based on cumulative damage under high impact was proposed in this paper. By analyzing the failure mechanism and failure mode of the missile recorder, the failure criterion of the recorder was proposed. In order to obtain the impact times of the recorder, a finite element model was established using ANSYS/LS-DYNA software, and the simulation was performed to calculate the continuous acceleration of the recorder. The life under load was fitted and the acceleration-life prediction curve was fitted. Finally, the drop curve test was used to verify the prediction curve. The results showed that the impact acceleration load was approximately negative index relationship with the life of the missile-borne logger, and the drop hammer test results had a good consistency with the life prediction curve.
In view of the fact that the missile-borne recorder can only rely on experience to judge the service life, a method for estimating the life of an ambulatory recorder based on cumulative damage under high impact was proposed in this paper. By analyzing the failure mechanism and failure mode of the missile recorder, the failure criterion of the recorder was proposed. In order to obtain the impact times of the recorder, a finite element model was established using ANSYS/LS-DYNA software, and the simulation was performed to calculate the continuous acceleration of the recorder. The life under load was fitted and the acceleration-life prediction curve was fitted. Finally, the drop curve test was used to verify the prediction curve. The results showed that the impact acceleration load was approximately negative index relationship with the life of the missile-borne logger, and the drop hammer test results had a good consistency with the life prediction curve.
引文
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[2]鲍爱达,陈员娥,李长龙,等.弹载加速度记录仪在冲击环境下的失效研究[J].振动与冲击,2013,32(13):182-186.
[3]刘雪飞.回收式弹载记录仪抗高冲击能力研究[D].太原:中北大学,2017.
[4]马其琪,徐晓辉,孔雁凯.弹载记录器的抗高过载分析及设计[J].弹箭与制导学报,2015(1):15-18.
[5]徐鹏,范锦彪,祖静.高g值冲击下存储测试电路模块缓冲保护研究[J].实验力学,2005(4):610-614.
[6]王亚利.ANSYS软件在机械结构分析中的应用[J].价值工程.,2013(3):203-204.
[7]徐鹏,祖静,范锦彪.应力波传播对弹丸实测超高值加速度的影响[J].测试技术学报,2006,20(1):41-45.
[8]卢玉斌,程永生,孙远程.冲击载荷作用下弹体内加速度分布研究[J].机械科学与技术,2014,33(2):157-163.
[9]贾丁治,苟瑞君.复合橡胶的吸能特性研究[J].图书情报导刊,2006,16(1):174-175.
[10]秦丽,陈员娥,李峰.弹载存储设备在侵彻下的失效分析[J].弹箭与制导学报,2014,34(4):158-161.
[11]陈飞珺.印制电路板表面涂覆层与刚挠分层的失效分析研究[D].上海:复旦大学,2014.
[12]林金堵.PCB翘曲度成因与对策[J].印制电路信息,1999(1):29-32.