霍普金森压杆整形器模型  

A Pulse Shaper Model for Hopkinson Pressure Bars

作　　者：苗飞超 张向荣[2] 李东伟 江涛 周霖[2] MIAO Feichao;ZHANG Xiangrong;LI Dongwei;JIANG Tao;ZHOU Lin(School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China;School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China;Chongqing Hongyu Precision Industry Group Co.Ltd.,Chongqing 402760,China)

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001 [2]北京理工大学机电学院,北京100081 [3]重庆红宇精密工业集团有限公司,重庆402760

出　　处：《兵工学报》2023年第7期1978-1984,共7页Acta Armamentarii

基　　金：安徽省自然科学基金项目(2208085QA27);安徽理工大学高层次引进人才科研启动基金项目(2021yjrc38)。

摘　　要：添加整形器是调整霍普金森杆入射波波形,进而准确测量炸药动态力学性能的重要手段。为预测添加整形器后完整的入射波波形,采用应力波理论对子弹-整形器-入射杆系统中的一维应力波传播过程进行研究。利用波的叠加原理得到整形器加载-卸载的统一控制方程,据此建立整形器模型;通过对整形器材料-T2纯铜进行霍普金森压杆和整形器试验,得到T2纯铜的一维应力-应变关系;采用整形器模型预测单整形器和双整形器试验的入射波波形,分析不同工况条件下整形器的变形特性。分析结果表明:整形器模型具备预测包含卸载段在内的完整入射波波形的能力,模型预测的入射波波形与试验测量波形整体吻合较好,验证了整形器模型的可行性和整形器应力-应变关系参数标定的准确性。Adding a pulse shaper for Hopkinson bars is an important method to adjust the profile of incident pulses and accurately measure the dynamic mechanical properties of explosives.To predict the complete profile of incident pulses after incorporating the pulse shaper,the wave propagation process in the striker-pulse shaper-incident bar system is analyzed based on the stress wave theory.A unified governing equation predicting the loading-unloading process of pulse shapers is obtained using the superposition principle of waves.Consequently,a general pulse shaper model is developed.The one-dimensional stress-strain relationship of T2 pure copper is obtained by using Hopkinson pressure bar and pulse shaper experiments.The model predicts the profile of incident pulses of single pulse shaper and dual pulse shaper experiments,and analyzes the deformation characteristics of the pulse shaper under various conditions.The results show that the pulse shaper model is able to predict the complete profile of incident pulses,including the unloading range.The profile of incident pulses predicted by the model is in good agreement with the experimental results,indicating the validity of the model and the high accuracy of the calibrated parameters.

关 键 词：霍普金森压杆 应力波 整形器模型 入射波波形 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]