强冲击下PZT-5H压电陶瓷的动力响应及电输出特性研究
Research on Dynamic Response and Electrical Output Characteristics of PZT-5H Piezoelectric Ceramics under Strong Shock
查看参考文献13篇
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文摘
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为了揭示冲击压力对PZT-5H压电陶瓷电输出特性的影响,利用自行建立的聚偏氟乙烯冲击压力测试系统和压电陶瓷电输出性能测试系统,以一级轻气炮作为加载手段,开展了柱状铝合金弹丸分别以195 m/s、487 m/s、532 m/s和613 m/s的速度垂直撞击复合靶板(钢片-压电陶瓷-有机玻璃)的实验。利用有限元分析软件ANSYS/LS-DYNA进行弹靶碰撞的有限元分析,分析了不同速度下PZT-5H的冲击压力时程。根据实验系统建立了弹靶接触时应力波传播的简化模型,并通过模型计算出复合结构中PZT-5H压电陶瓷承受的冲击压力峰值。运用实验得到的冲击压力时程、压电陶瓷输出电压时程和储能电容充电电压时程,分析了不同峰值压力脉冲作用下PZT-5H压电陶瓷电输出特性的变化规律。研究结果表明:冲击压力峰值的计算结果与仿真结果、实验测量结果趋势吻合;冲击压力峰值在200~700 MPa范围内时,PZT-5H压电陶瓷输出电压峰值随着冲击应力峰值的增加而增大,且近似呈线性关系;在高速撞击PZT-5H压电陶瓷过程中动能与电能的能量转化效率较低,当储能电容量与PZT-5H压电陶瓷电容量比值为5.9∶1时,压电陶瓷的能量转化率为1.1%. |
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其他语种文摘
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The test systems for impact pressure of polyvinylidene fluoride (PVDF) and electrical output characteristics of piezoelectric ceramics were built to study the influence of impact pressure on the electrical output characteristics of PZT-5H piezoelectric ceramics. The one-stage light gas gun is used as a loading means, and the experiments of which the cylindrical aluminum alloy projectiles vertically impact an composite target plate (steel sheet-piezoelectric ceramic-plexiglass) at the speeds of 195 m/s, 487 m/s, 532 m/s and 613 m/s are conducted. The projectile impact on target is analyzed by using ANSYS/LS-DYNA. The time histories of shock pressure of PZT-5H at the different speeds are analyzed. A simplified model of stress wave propagation is established based on the experimental system, and the pressure peak of PZT-5H in the composite structure is calculated by the proposed model. The change rules of PZT-5H piezoelectric ceramics under different peak pressure are analyzed from the time histories of shock pressure, output voltage of piezoelectric ceramics, and charging voltage of energy-storing capacitance. The research results show that the calculated impact pressure peaks are consistent with the simulated and experimental results; the output voltage peak of PZT-5H piezoelectric ceramics rises with the increase in impact pressure peak in the range of pressure peak of 200-700 MPa; the conversion efficiencies of kinetic and electric energies are low when PZT-5H piezoelectric ceramics is impacted by high-speed projectile. As the ratio of energy storage capacity to piezoelectric ceramic capacitance is 5.9∶1, the energy conversion rate of piezoelectric ceramics is 1.1% compared to the primary kinetic energy of projectile. |
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来源
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兵工学报
,2018,39(5):983-990 【核心库】
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DOI
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10.3969/j.issn.1000-1093.2018.05.019
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关键词
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PZT-5H压电陶瓷
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高速碰撞
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冲击压力
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电输出特性
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地址
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沈阳理工大学装备工程学院, 辽宁, 沈阳, 110159
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-1093 |
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学科
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武器工业 |
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基金
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国家自然科学基金项目
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辽宁省兵器科学与技术重点实验室开放基金项目(2014年)
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文献收藏号
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CSCD:6255144
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