32级模块化Marx发生器机芯模态分析

王海洋; 肖晶; 谢霖燊; 吴伟; 程乐; 何小平; 孙楚昱

doi:10.11884/HPLPB202133.210054

32级模块化Marx发生器机芯模态分析

doi: 10.11884/HPLPB202133.210054

王海洋^{1, 2,},
肖晶^{1, 2},
谢霖燊^{1, 2},
吴伟^{1, 2},
程乐^{1, 2},
何小平^{1, 2},
孙楚昱^{1, 2}

1.
西北核技术研究所，西安 710024
2.
强脉冲辐射环境模拟与效应国家重点实验室，西安 710024

详细信息

作者简介:
王海洋（1979—），男，博士，副研究员，主要从事脉冲功率技术研究

中图分类号: TM832; TH122
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- 文章访问数: 828
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- 被引次数: 0
出版历程
- 收稿日期: 2021-02-22
- 修回日期: 2021-08-02
- 网络出版日期: 2021-08-14
- 刊出日期: 2021-08-15

Modal analysis of the 32-stage modular Marx generator

Wang Haiyang^{1, 2
,},
Xiao Jing^{1, 2},
Xie Linshen^{1, 2},
Wu Wei^{1, 2},
Cheng Le^{1, 2},
He Xiaoping^{1, 2},
Sun Chuyu^{1, 2}

1.
Northwest Institute of Nuclear Technology, Xi’an 710024, China
2.
State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Xi’an 710024, China

摘要

摘要: 模态分析可以获得结构的动特性参数。对32级模块化Marx发生器机芯进行了力学特性仿真分析和模态试验，用以评估Marx发生器的力学环境适应性。首先，建立了模块化Marx机芯的有限元模型，获得了初步振型；其次，在自由边界条件下分别开展了Marx机芯整体模态试验、局部模态试验和传递特性试验，得到了整体和局部结构的模态参数。研究表明，模块化Marx机芯在23.58 Hz处出现整体一阶扭转；机芯局部结构固有频率较高；机芯在x，y，z三个方向的振动传递率的范围分别为5～15，6～10和10～35，为后续工程中Marx发生器机芯的针对性设计提供了参考。
- Marx发生器 /
- 随机振动 /
- 有限元分析 /
- 振动冲击 /
- 模态分析
Abstract: The dynamic characteristic parameters of the Marx generator can be obtained by modal analysis. In this paper, the simulation analysis and modal experiment of the 32-stage modular Marx generator are conducted to evaluate its mechanical environment adaptability. Firstly, the finite element simulation model of the modular Marx generator is constructed, and the initial vibration modes are acquired. Secondly, under free boundary condition, the integral modal experiment, local modal experiment and transfer characteristic experiment are conducted respectively. In the end, the integral and local modal parameters are calculated. Results show that the 32-stage modular Marx generator has a first-order torsion at 23.58 Hz; the inherent frequency of local structure of the Marx generator is relatively high; the vibration transmissibility scopes on x, y and z axis are respectively 5−15, 6−10 and 10−35. These conclusions provide reference to design Marx generator in later engineering phase.
- Marx generator /
- random vibration /
- finite element analysis /
- vibration and shock /
- modal analysis

HTML全文

图 1 32级Marx发生器机芯

Figure 1. 32-stage Marx generator

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图 2 单级模块结构示意图

Figure 2. Structure of one stage module

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图 3 32级Marx发生器机芯的模态分析结果

Figure 3. Modal analysis results of the 32-stage Marx generator

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图 4 自由边界整体模态试验振型

Figure 4. Vibration mode of integral modal analysis under free boundary condition

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图 5 x方向上的振动传递率

Figure 5. Vibrational transmissibility on x axis

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图 6 y方向上的振动传递率

Figure 6. Vibrational transmissibility on y axis

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图 7 z方向上的振动传递率

Figure 7. Vibrational transmissibility on z axis

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表 1 材料参数

Table 1. Parameters of the materials

material	Young modulus/GPa	Poisson’s ratio	density/（kg·m⁻³）
stainless steel	190	0.33	8000
glass fiber	37.2	0.25	2440
MC nylon	31.9	0.40	1150

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表 2 自由边界整体模态试验结果

Table 2. Integral modal analysis results under free boundary condition

frequency/Hz	damping ratio/%	mode of vibration
23.58	1.50	overall first-order torsion
30.76	1.31	overall first-order bend in y direction
34.33	0.99	overall first-order bend in z direction
48.76	0.98	approximate second-order bend in z direction
63.31	0.92	overall second-order torsion
70.93	1.40	the phase of glass fiber side plate in x direction is opposite
75.14	1.91	overall second-order bend in z direction

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表 3 自由边界局部模态试验结果

Table 3. Local modal test results under free boundary condition

frequency/Hz	corresponding part
100.6，151.3	upper shielded ring at the outermost of the 4th module
129.4，188.7	upper shielded ring at the outermost of the 3rd module
59.28，206.3	capacitor and switch of the 4th module
58.59，219.8	capacitor and switch of the 3rd module
124.9，225.8	U-shape support rod of the 1st module

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