基于电磁感应原理的冲击试验技术

陈旭; 李子祺; 吴亚东; 王靖博; 李玉龙; 郭亚洲

doi:10.11883/bzycj-2023-0195

基于电磁感应原理的冲击试验技术

doi: 10.11883/bzycj-2023-0195

陈旭^1,,
李子祺¹,
吴亚东²,
王靖博¹,
李玉龙^{1, 3, 4},
郭亚洲^{1, 3, ,}

1.
西北工业大学航空学院，陕西西安 710072
2.
北京宇航系统工程研究所，北京 100076
3.
陕西省冲击动力学及工程应用重点实验室，陕西西安 710072
4.
西北工业大学民航学院，陕西西安 710072

详细信息

作者简介:
陈　旭（1997－　），男，硕士研究生，iamcxchenxu@163.com

通讯作者:
郭亚洲（1981－　），男，博士，教授，guoyazhou@nwpu.edu.cn

中图分类号: O389
计量
- 文章访问数: 37
- HTML全文浏览量: 8
- PDF下载量: 18
- 被引次数: 0
出版历程
- 收稿日期: 2023-05-25
- 修回日期: 2024-03-03
- 网络出版日期: 2024-06-24

Impact testing technique based on the principle of electromagnetic induction

CHEN Xu^1
,,
LI Ziqi¹,
WU Yadong²,
WANG Jingbo¹,
LI Yulong^{1, 3, 4},
GUO Yazhou^{1, 3
, ,}

1.
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China
2.
Beijing Institute of Aerospace System Engineering, Beijing 100076, China
3.
Shaanxi Impact Dynamics and Engineering Application Laboratory, Xi’an 710072, Shaanxi China
4.
School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China

摘要

摘要: 基于电磁感应的基本原理，提出了一种由电磁力驱动产生高幅值长脉宽加速度载荷的冲击试验装置，弥补了现阶段地面冲击试验技术的缺陷。使用电磁Hopkinson杆进行了加速度冲击试验，得到了应力和加速度载荷。根据一维应力波原理，推导出细长杆中加速度与应力之间的关系式，计算结果表明试验值和理论值吻合较好，验证了试验方法的准确性。使用COMSOL有限元软件对电磁Hopkinson杆加速度冲击试验进行了数值模拟，模拟结果与试验结果一致性较好，验证了数值模型和方法的准确性。基于此有限元模型，提出了产生高幅值长脉宽加速度载荷的冲击试验装置，并对该装置进行了不同电压和电容下的数值模拟。结果表明，提出的试验装置能够产生长脉宽高幅值的加速度过载环境，且电容电压越大则加速度幅值越大，电容值越大加速度脉宽越宽。通过调控装置中的电路参数，可产生不同幅值和脉宽的加速度载荷。
- 电磁感应 /
- 电磁Hopkinson杆 /
- 高幅值长脉宽 /
- 冲击试验
Abstract: Based on the basic principles of electromagnetic induction, an impact device is proposed that generates high-amplitude and long-pulse acceleration loads driven by electromagnetic forces. The impact device goes to make up for the shortcomings of the current stage of ground impact test technology. The disadvantages of the current stage of ground impact test technology include mainly time-consuming, high cost, low repeatability and controllability, and it is difficult to continuously improve the pulse width of acceleration load. Acceleration impact tests were performed using an electromagnetic Hopkinson bar, and the working process of the device from the generation of electromagnetic force to its transformation into impact load was analyzed. In the acceleration impact test, the stress on the bar was obtained by strain gauges and the acceleration loads at the end of the bar were obtained by acceleration transducers. A plurality of test results without loss of repeatability. The classical one-dimensional stress wave theory for predicting the relationship between acceleration and stress in slender bars is developed. Comparative analysis against experimental data are presented to demonstrate the effectiveness of the present approach. The electromagnetic Hopkinson bar acceleration impact test was numerically simulated using COMSOL finite element software, and the simulation results showed good consistency with the experimental results, indicating that the numerical model could simulate this kind of impact test more accurately and verifying the accuracy of the numerical model. Based on this finite element model, an impact device that generates high-amplitude, long-pulse acceleration is proposed, and numerical simulations of the device are carried out at different voltages and capacitances. The simulation results show that the device is able to generate the required acceleration. The acceleration amplitude increases with increasing capacitance voltage and the acceleration pulse width increases with increasing capacitance value. By regulating the values of the circuit parameters, the device can generate acceleration loads with different amplitudes and pulse widths.
- Electromagnetic induction /
- Electromagnetic Hopkinson bar /
- High-amplitude, long-pulse /
- Impact test

HTML全文

图 1 电磁驱动系统基本工作原理图^[14]

Figure 1. Schematic Diagram of electromagnetic system^[14]

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图 2 等效RLC电路

Figure 2. Equivalent RLC circuit

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图 3 放电线圈与次级线圈结构图^[16]

Figure 3. Structure of main coil and secondary coil^[16]

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图 4 次级线圈受力示意图

Figure 4. Force diagram of secondary coil

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图 5 电磁Hopkinson杆加速度冲击装置图

Figure 5. Diagram of electromagnetic Hopkinson bar system

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图 6 电压为700和1400 V应力时间曲线

Figure 6. Stress-time curve with voltage at 700 and 1400 V

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图 7 电压700 V和1400 V加速度时间曲线

Figure 7. Acceleration-time curve with voltage at 700 V and 1400 V

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图 8 加载后次级线圈图和转换接头

Figure 8. Secondary coil and adapter after impact

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图 9 电压为700和1400 V理论与试验加速度结果对比

Figure 9. Comparison of acceleration between theory and test with voltage at 700 and 1400 V

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图 10 电磁Hopkinson杆有限元模型图

Figure 10. Finite element model of electromagnetic Hopkinson bar

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图 11 电压为700和1400 V模拟和试验应力结果对比

Figure 11. Comparison of stress between simulation and test with voltage at 700 and 1400 V

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图 12 电压700和1400 V模拟与试验结果对比

Figure 12. Comparison of results between simulation and test with voltage at 700 and 1400 V

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图 13 冲击试验装置剖面

Figure 13. Cross section of impact test device

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图 14 冲击试验装置加速度值

Figure 14. Acceleration curve of impact test device

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图 15 电压值对加速度的影响

Figure 15. Effect of voltage on acceleration

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图 16 加速度峰值与电压的关系

Figure 16. Relationship between peak of acceleration and voltage

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图 17 电容值对加速度的影响

Figure 17. Effect of Capacitance on acceleration

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图 18 电容值与电流的关系

Figure 18. Relationship between capacitance and electric current

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表 1 各部件材料参数^[18-19]

Table 1. Parameters of each part^[18-19]

部件	材料	密度/（kg·m⁻³)	弹性模量/GPa	泊松比	相对磁导率	电导率/(S·m⁻¹)	相对介电常数
主动线圈	紫铜	8960	110	0.35	1	6.0×10⁷	1
次级线圈	无氧铜	8940	105	0.33	1	5.8×10⁷	1
波导杆	钛合金	4400	110	0.34	1	7.4×10⁵	1
空气	—	—	—	—	1	0	1

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表 2 模拟时主要部件最大应力

Table 2. Max stress of each part in simulation

部件	材料	屈服强度/ MPa	模拟最大应力/MPa
主动线圈	紫铜	76	58
次级线圈	无氧铜	300	200
垫块	钨	1300	750
加载杆	TC4钛合金	900	735
连接与放大装置	TC4钛合金	900	845

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