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[1]闫松,张志伟.基于3D-SLDV和高速3D-DIC的离心轮模态分析[J].火箭推进,2024,50(02):107-112.[doi:10.3969/j.issn.1672-9374.2024.02.011]
　YAN Song,ZHANG Zhiwei.Modal analysis of the impeller based on 3D-SLDV and high speed 3D-DIC technology[J].Journal of Rocket Propulsion,2024,50(02):107-112.[doi:10.3969/j.issn.1672-9374.2024.02.011]
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基于3D-SLDV和高速3D-DIC的离心轮模态分析

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 50 期数: 2024年02期 页码: 107-112 栏目: 目次 出版日期: 2024-05-30
Title:
Modal analysis of the impeller based on 3D-SLDV and high speed 3D-DIC technology
文章编号:
1672-9374202402-0107-06
作者:
闫松1; 2; 张志伟1; 2
1.航天液体动力全国重点实验室,陕西 西安 710100; 2.西安航天动力研究所,陕西 西安 710100
Author(s):
YAN Song1; 2;  ZHANG Zhiwei1; 2
1.National Key Laboratory of Aerospace Liquid Propulsion, Xi'an 710100, China; 2.Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
关键词:
液体火箭发动机;  3D-SLDV;  高速3D-DIC;  离心轮;  工作变形
Keywords:
liquid rocket engines;  3D-SLDV;  high-speed 3D-DIC;  impeller;  operational deflection shape
分类号:
V434
DOI:
10.3969/j.issn.1672-9374.2024.02.011
文献标志码:
A
摘要:
全场振型对于研究发动机结构动特性至关重要,介绍了基于3D-SLDV和高速3D-DIC两种全场振动测试方法的测试原理。以液体火箭发动机离心轮为例,分别采用两种技术获得了5 kHz内离心轮的固有频率和振型,对比分析了两种测试方法的优缺点,结果表明:3D-SLDV技术比3D-DIC技术具有更低的位移本底噪声,对高频振型辨识更有利,但该方法属于逐点扫描测试,测试时间长; 3D-DIC技术全场数据同时采集,采集时间短,具有更精细的振型,但图像的数据量大,数据传输和分析时间长,同时这种基于位移的测试方法存在本底噪声限制。
Abstract:
The full-field mode shape is important for studying the structural dynamic characteristics of the engine structure. The test principles of two full-field vibration test methods based on 3D-SLDV and high-speed 3D-DIC are introduced. Taking the impeller of liquid rocket engines as an example, the natural frequency and mode shape of the impeller within 5 kHz are obtained by using two technologies respectively, and the advantages and disadvantages of the two test methods are compared and analyzed. Compared with 3D-DIC, the displacement noise floor of 3D-SLDV technology is lower, which is more beneficial to the identification of high-frequency mode shapes, but this method belongs to the point-by-point scanning test, and the test time is long. 3D-DIC technology collects the full-field data simultaneously, its acquisition time is short, and it has a more refined mode shape. However, the amount of image data is large, and it takes a long time to download and analyze the data. At the same time, this displacement-based measurement method cannot identify the displacement below the noise floor.

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备注/Memo

收稿日期:2023- 04- 26 修回日期:2023- 06- 04
基金项目:国家重点实验室基金(HTKJ2021KL011004)
作者简介:闫松(1988—),男,博士,高级工程师,研究领域为液体火箭发动机结构动力学、视觉测量技术。

更新日期/Last Update: 1900-01-01