同轴脉冲形成线的运输振动环境适应性研究

范红艳; 王俊杰; 刘胜; 张雪飞; 孙旭; 王刚; 寇磊; 候振园

doi:10.11884/HPLPB202133.210067

同轴脉冲形成线的运输振动环境适应性研究

doi: 10.11884/HPLPB202133.210067

1.
西北核技术研究所，西安 710024
2.
北京正阳恒卓科技有限公司，北京 100032
3.
西安交通大学，西安 710049

基金项目: 国家技术创新类项目

详细信息

作者简介:
范红艳（1988—），女，硕士，工程师，从事脉冲功率技术研究

中图分类号: TN782
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- 文章访问数: 749
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- 被引次数: 0
出版历程
- 收稿日期: 2021-03-08
- 修回日期: 2021-05-15
- 网络出版日期: 2021-05-17
- 刊出日期: 2021-05-20

Research on transportation vibration environmental adaptability of coaxial pulse forming line

1.
Northwest Institute of Nuclear Technology, Xi’an 710024, China
2.
Beijing Zhengyang Hengzhuo Technology Co., Ltd., Beijing 100032, China
3.
Xi’an Jiaotong University, Xi’an 710049, China

摘要

摘要: 为了准确评估某MV级Tesla型脉冲功率源的运输振动环境适应性水平，针对脉冲功率源中采用悬臂绝缘支撑结构的同轴脉冲形成线，通过仿真和试验结合的方法开展研究。针对叠层结构式内外磁芯，提出一种通过结构元胞等效材料参数和坐标变换的等效建模方法进行有限元建模，通过模态试验修正有限元模型，首次对比研究了绝缘油对形成线的模态频率和阻尼的影响，仿真分析了形成线车载运输典型工况的应力及响应，设计实施了大尺寸形成线等效件振动试验进行验证。通过振动试验发现了形成线结构存在非线性，通过仿真分析和等效件试验验证，同轴脉冲形成线现有结构设计基本满足车载运输振动环境适应性要求。
- 同轴脉冲形成线 /
- 内外磁芯 /
- 绝缘油 /
- 非线性 /
- 运输振动 /
- 环境适应性
Abstract: To evaluate the vibration environmental adaptability of Tesla-type pulse generator under vehicle transportation condition, simulation and verification test were carried out for the coaxial pulse forming line (PFL) with cantilever support insulators. An equivalent modeling was proposed for the inner and outer magnetic cores with laminated structure. The finite element model was modified according to the modal test results. Thus the effect of insulating oil on the modal frequency and damping of the PFL was studied, the stress and response of PFL under typical transportation conditions were obtained by simulation, and the vibration test of PFL equivalent parts was conducted to verify the simulation result. It was found that the structure of the PFL were nonlinear in the vibration test. The simulation analysis and the vibration test of equivalent parts verify that the existing structure of the coaxial PFL meets the requirements of vehicle transportation vibration environmental adaptability.
- coaxial PFL /
- inner and outer magnetic cores /
- insulating oil /
- nonlinear /
- transportation vibration /
- environmental adaptability

HTML全文

图 1 同轴结构二倍宽脉冲形成线结构示意图

Figure 1. Structure diagram of coaxial duple-width PFL

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图 2 研究思路

Figure 2. Research flow chart

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图 3 内磁芯结构示意图

Figure 3. Structure diagram of inner magnetic core

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图 4 内磁芯结构元胞示意图

Figure 4. Structure diagram of inner magnetic core cell

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图 5 内磁芯几何模型及材料坐标系

Figure 5. Geometric model and local coordinate system of inner magnetic core

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图 6 外磁芯几何模型及材料坐标系

Figure 6. Geometric model and local coordinate system of outer magnetic core

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图 7 形成线组件模态实验照片

Figure 7. Photo of PFL modal test

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图 8 形成线有限元模型及固支边界

Figure 8. Finite element model of PFL under clamped boundary condition

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图 9 车载运输环境典型工况激励谱

Figure 9. Excitation spectrum of typical working conditions of vehicle transportation environment

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图 10 尾端绝缘子应力云图（轮式车辆运输垂向）

Figure 10. Contour curve of tail insulator (wheel vehicle transportation along the vertical direction)

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图 11 形成线等效件结构

Figure 11. Equivalent structure of PFL

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图 12 形成线等效件振动试验

Figure 12. Vibration test of PFL equivalent parts

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图 13 运输前输出脉冲波形

Figure 13. Output pulse waveform before transportation

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图 14 运输后输出脉冲波形（3000 km，高速公路）

Figure 14. Output pulse waveform after transportation (3000 km, highway)

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表 1 结构元胞的等效材料参数

Table 1. Equivalent material parameters of structure cell

E₁ / GPa	E₂ / GPa	E₃ / GPa	V₁₂	V₁₃	V₂₃	G₁₂ / GPa	G₁₃ / GPa	G₂₃ / GPa
152	152	14.10	0.29	0.28	0.28	60.50	11.03	11.03

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表 2 形成线模态分析结果

Table 2. Modal analysis results of PFL

mode	frequency/Hz	modal shape
1	24.36	lateral bending of inner conductor （x direction）
2	24.41	vertical bending of inner conductor （y direction）
3	34.05	bending of inner conductor along the z direction
4	43.53	twisting of inner conductor around the z-axis

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表 3 形成线两种状态模态试验结果对比

Table 3. Modal test results of PFL under two different conditions

mode	modal shape	frequency （oil-free）/Hz	frequency （full of oil）/Hz	damping coefficient （oil-free）/%	damping coefficient （full of oil）/%
1	lateral bending of inner conductor （x direction）	33.38	18.03	1.71	5.89
2	vertical bending of inner conductor （y direction）	37.80	18.92	1.30	10.61
3	bending of inner conductor along the z direction	57.43	42.64	1.10	7.96
4	twisting of inner conductor around the z-axis	42.35	51.62	1.50	6.63

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表 4 形成线仿真频率与试验频率对比（有油）

Table 4. Contrast between simulation frequency and measured frequency of PFL (full of oil)

mode	modal shape	simulation frequency/Hz	measured frequency/Hz	error/%
1	lateral bending of inner conductor （x direction）	24.36	18.03	25.99
2	vertical bending of inner conductor （y direction）	24.41	18.92	22.49
3	bending of inner conductor along the z direction	34.05	42.64	−25.23
4	twisting of inner conductor around the z−axis	43.53	51.62	−18.58

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表 5 试验频率与修正模型计算频率对比（有油）

Table 5. Contrast between measured frequency and simulation frequency of modified model (full of oil)

mode	modal shape	measured frequency/Hz	modified simulation frequency/Hz	error/%
1	lateral bending of inner conductor （x direction）	18.03	18.95	5.10
2	vertical bending of inner conductor （y direction）	18.92	19.02	0.53
3	bending of inner conductor along the z direction	42.64	30.61	−14.61
4	twisting of inner conductor around the z−axis	51.62	46.16	−10.58

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表 6 计算结果汇总（车载运输环境）

Table 6. Calculation results (vehicle transportation condition)

condition	maximum acceleration （middle conductor）/g	maximum dynamic stress/MPa	total stress/ MPa	maximum stress （tail insulator）/MPa
highway transportation（vertical）	1.95	50.08	223.08	27.78
wheel vehicle transportation（vertical）	2.40	73.46	246.46	40.99
impact（20g，vertical）	39.95	60.22	233.22	33.67

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表 7 中筒尾端响应加速度汇总表

Table 7. Response acceleration summary of middle conductor

test condition	longitudinal acceleration/g	vertical acceleration/g	lateral acceleration/g
highway transportation	1.34	2.01	0.53
wheel vehicle transportation	1.76	2.05	2.66
impact（5g）	9.41	13.11	8.44
Note：The results of highway and wheel vehicle transportation tests were root mean square values.

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表 8 横向（z向）不同量级扫频振动试验内筒上测点的一阶响应频率

Table 8. First mode frequency of inner conductor under different magnitudes of sine sweep tests (z direction)

magnitude/(g²·Hz⁻¹)	response frequency/Hz
0.001	26
0.000 1	26
0.000 01	30
0.000 001	30
0.000 000 1	31

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参考文献(16)

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