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MA M X , LI R , NIU L J . Evaluation index of disturbance superposition degree in multi-layer penetration acceleration signal [J ] . Acta Armamentarii , 2022 , 43 ( 1 ): 20 - 28 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2022.01.003 http://doi.org/10.3969/j.issn.1000-1093.2022.01.003 The evaluation indexes of layer and inter-layer coefficients for the signal superposition degree is presented to solve lack of measurement criterion of inter-layer superposition in multi-layer penetration acceleration signal. The test and simulated signals are segmented by penetration layers. The layer and inter-layer coefficients of acceleration signal for each layer are calculated by subtracting every amplitude of signal points by former one and summing the absolute values of difference values. The larger the two sets of evaluation indexes are, the more severer the superposition degree is. The calculated results of test and simulated signals are used to demonstrate the efficiency of evaluation indexes. The calculated results of layer and inter-layer coefficients in 3 sets of data show that the layer and inter-layer coefficients are smaller if the disturbance superposition degree is lower, and vice versa. One set of data is extracted from the calculated results of evaluation indexes of acceleration signal for two detonation control circuits in one penetration warhead, and the calculated deviation is less 5%. The calculated result is consistent to the results of qualitative analysis and spectral analysis. The experimental results show that the layer and inter-layer coefficients are efficient for evaluating the disturbance superposition degree in multi-layer penetration acceleration signal.

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程祥利 , 刘波 , 赵慧 , 等 . 侵彻战斗部-引信系统动力学建模与仿真 [J ] . 兵工学报 , 2020 , 41 ( 4 ): 625 - 633 . DOI: 10.3969/j.issn.1000-1093.2020.04.001 http://doi.org/10.3969/j.issn.1000-1093.2020.04.001 为揭示侵彻过程中引信电路模块的动态响应机理，将机械振动理论引入侵彻过程理论分析与计算，提出一种简化的侵彻战斗部-引信系统动力学模型。以侵彻战斗部-引信系统的载荷传递关系为基础，基于多自由度弹簧-质量-阻尼系统建立模型的动力学微分方程；通过谐响应分析确定固有频率、阻尼比等动力学参数，并采用数值积分的方法预测不同侵彻工况下的响应特性；从系统幅频响应特性的角度分析响应特性与传统经验公式解有很大差异的原因。与谐响应分析结果、火炮试验实测过载信号的对比分析表明：提出的动力学模型能准确、快速地预测战斗部、引信在侵彻过程中的响应特性；考虑轴向振动后，侵彻战斗部表现出明显的振动放大特性与周期振荡特性，而且是影响引信电路模块响应特性的首要因素。

CHENG X L , LIU B , ZHAO H , et al . Dynamic modeling and simulation for penetration warhead-fuze system [J ] . Acta Armamentarii , 2020 , 41 ( 4 ): 625 - 633 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2020.04.001 http://doi.org/10.3969/j.issn.1000-1093.2020.04.001 The mechanical vibration theory is introduced into theoretical analysis and calculation of penetration process, and a simplified dynamic model of penetration warhead-fuze system is proposed with the purpose of revealing the dynamic response mechanism of circuit module of fuze in penetration process. On the basis of analysis of loading transfer relation, a dynamic differential equation is established based on multi-DOFs spring-mass-damper system, and the dynamic parameters, such as natural frequency and damping ratio, are determined by the harmonic response analysis. Then the dynamic characteristics under different penetration conditions are predicted by numerical integration method, and the reason why the predicted dynamic characteristics differ greatly from the calculated result of the traditional empirical formula is analyzed from the amplitude-frequency response.The credibility of the proposed model was verified through artillery test, and the overload signal in penetration process was collected. The calculated value of overload signal is in agreement well with measured result. The result shows that the proposed model is more suitable to predict the dynamic characteristics of warhead or fuze in penetration process. It is shown that penetration warhead exhibits obvious vibration amplificatory characteristics and periodic oscillation characteristics in considering the axial vibration effect, and the dynamic characteristics of warhead are the most important factor affecting the dynamic characteristics of circuit module in fuze.Key

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XU X , GAO S Q , NIU S H , et al . Dynamic analysis of projectile-borne electronic devices under impact loading [J ] . Acta Armamentarii , 2017 , 38 ( 7 ): 1289 - 1300 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2017.07.006 http://doi.org/10.3969/j.issn.1000-1093.2017.07.006 The dynamic responses of projectile-borne electronic devices which are protected by encapsulating material under impact loading are studied through numerical simulation. A LS-DYNA user defined material subroutine is established according to the ZWT nonlinear viscoelastic model which is used for simulating the dynamic response of the encapsulating material in the projectile. The simulations of projectile penetration were performed by adjusting the controllable parameters of ZWT model, such as nonlinear elasticity modulus, low strain rate Maxwell elastic constant, high strain rate Maxwell elastic constant, high strain rate Maxwell relaxation time and material density. Thus the dynamic responses of projectile-borne electronic devices could be obtained from the numerical results. The research results show that the shock absorption and protection effects of the encapsulating materials are better when the values of nonlinear elasticity modulus, low strain rate Maxwell elastic constant, high strain rate Maxwell relaxation time and material density are decreased. Key

宋英燕 , 张京英 , 李晓峰 , 等 . 两种连接结构动载荷传递特性的Matlab仿真研究 [J ] . 图学学报 , 2017 , 38 ( 6 ): 809 - 813 . DOI: 10.11996/JG.j.2095-302X.2017060809 http://doi.org/10.11996/JG.j.2095-302X.2017060809 研究了两种连接结构在低速冲击过程中的动载荷传递特性。通过MIPS(muti-directional impact protection system)冲击实验，获得系统的冲击与响应过载信号；基于MATLAB 对信号进行了时域与功率谱分析，结果表明结构A 的阻尼作用大于结构B，对冲击系统有一定的减震作用；结构B 的谐振频率明显，共振幅值高，不适用于冲击结构。这种差异性对连接结构的设计具有指导性的意义。通过MATLAB 函数辨识工具对两种结构的信号传递过程进行函数辨识；通过适当增大零/极点数的方法对传递函数进行了优化。实验数据检验结果表明，该优化方法能有效提高传递函数的适配度，对其他结构控制系统的设计具有一定的指导意义。

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