高聚物粘接炸药的超声特性数值方法研究  

Research on Numerical Methods for the Ultrasonic Characterization of Polymer-Bonded Explosives

作　　者：徐晓宇 严贵生[1] 曹玉玲[1] 张子烁 XU Xiaoyu;YAN Guisheng;CAO Yuling;ZHANG Zishuo(Beijing Institute of Control Engineering,Beijing 100080,China;Beijing Institute of Technology,Beijing 100190,China)

机构地区：[1]北京控制工程研究所,北京100080 [2]北京理工大学,北京100190

出　　处：《机电技术》2024年第4期85-92,共8页Mechanical & Electrical Technology

基　　金：北京理工大学科技创新计划项目(2018CX10004)。

摘　　要：高聚物粘接炸药(PBX)作为航天工程中的一种功能性复合材料,其可靠性关系着装备的性能稳定及使用安全,它的失效往往会导致严重事故,造成人员伤亡及财产损失。文章通过Voronoi方法建立了脆性颗粒-粘弹性粘接剂构成的两相复合材料模型,模拟了内部颗粒的分布及形貌的随机性,并以确定的各相本构参数建立了单颗粒及Voronoi代表性单元(RVE),探究了超声波在Voronoi单元及粘接剂中声特性参数的变化,在较大频率处有效预测了试验材料的衰减系数及声速,并对含裂纹模型的超声非线性特征进行了模拟及验证试验,为后续类PBX复合材料的超声无损检测方法提供理论基础。As a functional composite material in aerospace engineering,the reliability of polymer bonded explosives(PBX)is related to the stability of equipment performance and safety in use,and its failure often leads to serious accidents,resulting in casualties and property losses.In this paper,a two-phase composite material model composed of brittle particles-viscoelastic binder is established by the Voronoi method,which simulates the distribution of internal particles and the stochasticity of morphology,and establishes a single-particle and Voronoi representative unit(RVE)with the determined ontological parameters of each phase,and investigates the changes of acoustic characteristic parameters of ultrasonic waves in the Voronoi unit and the binder,and at a larger frequency the attenuation coefficient and sound velocity of the experimental materials were effectively predicted,and the ultrasonic nonlinear characteristics of the crack-containing model were simulated and tested to provide a theoretical basis for the subsequent ultrasonic nondestructive testing methods for PBX-like composites.

关 键 词：超声无损检测 高聚物粘接炸药 Voronoi方法 超声传播特性模拟 

分 类 号：TB553[理学—物理]