靶板厚度对破片声发射信号特征的影响研究  

Study of Target Plate Thickness Effect on Characteristics of Fragment Acoustic Emission Signal

作　　者：张恒庆 商飞[1] 赵永鑫 ZHANG Hengqing;SHANG Fei;ZHAO Yongxin(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《机械制造与自动化》2023年第2期23-26,共4页Machine Building & Automation

基　　金：国家自然科学基金资助项目(11372143)。

摘　　要：为研究铝合金靶板厚度对靶板声发射信号特征参数的影响,对直径8 mm球形破片侵彻不同厚度铝合金靶板进行数值模拟研究,获得靶板侵彻过程中的声发射信号。仿真分析不同速度下靶板厚度对破片侵彻过程中声发射信号特征参数的变化,研究发现:靶板厚度在3 mm~10 mm范围的声发射信号特征值幅度随破片速度的增大而增大;根据靶板厚度与靶板声发射信号特征参数的关系,选择合适厚度靶板对破片声发射信号进行分析。To study the influence over the thickness of aluminum alloy target plate on the characteristic parameters of the acoustic emission signal of the target plate,numerical simulations of the spherical shattering chip of 8 mm diameter penetrating different thicknesses of aluminum alloy target plate were carried out to obtain the acoustic emission signal during the target plate penetration process.With the simulation analysis of the thickness of the target plate at different speeds on the changes of acoustic emission signal characteristic parameters in the process of chip penetratio,it is found that the target plate thickness in the range of 3 mm-10 mm acoustic emission signal eigenvalue amplitude increases with the increase of chip speed.According to the relationship between the thickness of the target plate and the characteristic parameters of the target plate acoustic emission signal,the appropriate thickness of the target plate should be selected to analyze the fragment acoustic emission signal.

关 键 词：靶板厚度 破片侵彻 声发射信号 幅度 速度评估 

分 类 号：TJ510.6[兵器科学与技术—军事化学与烟火技术]