爆炸与冲击2025，Vol.45Issue(5)：1-12,12.DOI:10.11883/bzycj-2024-0181
超高速撞击条件下混凝土靶体内应力波的测量和分析
Measurement and analysis of stress waves in concrete target under hypervelocity impact
摘要
Abstract
To investigate the stress wave characteristics within concrete targets under hypervelocity impact,a stress wave testing system based on polyvinylidene difluoride(PVDF)piezoelectric stress gauges was established.A calibration method for PVDF piezoelectric stress gauges was proposed and conducted.The stress waveforms within concrete targets impacted by kilogram-scale cylindrical 93W tungsten alloy projectiles at hypervelocity were measured,and the generation and propagation mechanisms of stress waves were analyzed using numerical simulation methods.The following conclusions were drawn:(1)the dynamic characteristic parameters of the PVDF piezoelectric stress gauge were calibrated to yield a dynamic sensitivity coefficient of(17.5±0.5)pC/N for the PVDF piezoelectric stress gauge;(2)high signal-to-noise ratio stress waveforms within the concrete target under hypervelocity impact conditions were obtained using the PVDF piezoelectric stress gauge;(3)the stress waveforms obtained from numerical simulation were in good agreement with the experimentally measured waveforms where the maximum deviation of the stress wave peak values between simulation and experimental results is less than 20%,providing a useful tool for mechanism exploration;(4)the characteristics of stress waves within the concrete target and the mechanisms of generation and attenuation were further explored using numerical simulation methods.关键词
超高速撞击/应力波/PVDF/钨合金弹/混凝土靶/二级轻气炮Key words
hypervelocity impact/stress wave/PVDF/tungsten alloy projectile/concrete target/two-stage light gas gun分类
力学引用本文复制引用
钱秉文,周刚,陈春林,马坤,李艺烁,高鹏飞,尹立新..超高速撞击条件下混凝土靶体内应力波的测量和分析[J].爆炸与冲击,2025,45(5):1-12,12.基金项目
国家自然科学基金(11802248) （11802248）
