电容式高膛压测试仪的动态特性分析

李新娥; 祖静; 徐鹏

doi:10.11858/gywlxb.2014.01.018

电容式高膛压测试仪的动态特性分析

doi: 10.11858/gywlxb.2014.01.018

李新娥^{1, 2,},
祖静^{1, 2},
徐鹏^{1, 2}

1.
仪器科学与动态测试教育部重点实验室，山西太原 030051
2.
中北大学，山西太原 030051

详细信息

作者简介:
李新娥(1971-), 女, 教授, 主要从事测试计量技术与仪器研究.E-mail zn1lxe@163.com

中图分类号: O521.3; TH823
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出版历程
- 收稿日期: 2012-03-27
- 修回日期: 2012-05-14

Dynamic Characteristic Analysis of Capacitive High Bore Pressure Tester

LI Xin-E^{1, 2
,},
ZU Jing^{1, 2},
XU Peng^{1, 2}

1.
Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, Taiyuan 030051, China
2.
North University of China, Taiyuan 030051, China

摘要

摘要: 由于在压力的激励下新型电容式高膛压测试仪壳体产生的振动特性将影响测试仪的动态特性，因此着重研究了测试仪壳体的动力学特性，建立了壳体受外压作用时的动力学模型。理论计算表明，壳体径向振动的一阶振动频率在75 kHz以上，而火炮膛压的频谱在5 kHz以下，说明壳体振动对膛压测试精度的影响可以忽略。
- 压力 /
- 动力学特性 /
- 膛压测量
Abstract: According to the dynamic characteristics of a new capacitive high bore pressure tester, which is decided by the vibration characteristics of the pressure tester shell subjected to pressure, the dynamic model of the tester shell under external pressure was established, and the dynamic properties of the tester shell were studied.The calculation results show that the first vibration frequency of shell radial vibration is above 75 kHz, and the frequency spectrum of the bore pressure is below 5 kHz.Consequently, the influence of shell vibration on the test precision of bore pressure can be ignored.
- pressure /
- dynamic properties /
- chamber pressure measurement

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图 1 不受外力作用的壳体

Figure 1. A shell from external pressure

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图 2 电容式压力测试仪的结构

Figure 2. Structure of capacitive pressure tester

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图 3 膛压作用下内壁处的径向位移变化曲线

Figure 3. Radial displacement curve of the wall under bore pressure

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图 4 膛压作用下壳体的切向和径向应力

Figure 4. The shear and radial stresses of shell under bore pressure

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表 1 压力测试仪整体结构的径向振动频率

Table 1. The radial vibration frequency of the whole structure of pressure tester

Exponent number	Frequency/(kHz)
1	75.458
2	616.385
3	1 224.886
4	1 835.178
5	2 445.904
6	3 056.802
7	3 667.787
8	4 278.820

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参考文献(8)

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