| 王鹏,李伟,张军,王军评,黄含军.爆炸分离冲击信号修正及结构状态分析[J].装备环境工程,2022,19(4):8-13. WANG Peng,LI Wei,ZHANG Jun,WANG Jun-ping,HUANG Han-jun.Correction and Structural State Analysis under Pyrotechnic Shock Signal[J].Equipment Environmental Engineering,2022,19(4):8-13. |
| 爆炸分离冲击信号修正及结构状态分析 |
| Correction and Structural State Analysis under Pyrotechnic Shock Signal |
| 投稿时间：2021-01-10 修订日期：2021-03-03 |
| DOI：10.7643/issn.1672-9242.2022.04.002 |
| 中文关键词: 爆炸分离冲击 趋势项 小波分解 冲击响应谱 相关系数中图分类号:TJ02 V216.5+5 文献标识码:A 文章编号:1672-9242(2022)04-008-06 |
| 英文关键词:pyrotechnic shock trend item wavelet decomposition shock response spectrum correlation coefficient |
| 基金项目:国家自然科学基金(11802292，11902310) |
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| Author | Institution |
| WANG Peng | Institute of Systems Engineering, China Academy of Engineering Physics, Sichuan Mianyang 621900, China |
| LI Wei | Institute of Systems Engineering, China Academy of Engineering Physics, Sichuan Mianyang 621900, China |
| ZHANG Jun | Institute of Systems Engineering, China Academy of Engineering Physics, Sichuan Mianyang 621900, China |
| WANG Jun-ping | Institute of Systems Engineering, China Academy of Engineering Physics, Sichuan Mianyang 621900, China |
| HUANG Han-jun | Institute of Systems Engineering, China Academy of Engineering Physics, Sichuan Mianyang 621900, China |
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| 中文摘要: |
| 为了对爆炸分离冲击信号进行有效性分析及校正，进而对关键结构的状态变化进行分析，基于离散小波分解方法，对实测分离冲击信号及其速度积分进行校正，去除零漂趋势项。选取冲击结束后剩余自由响应阶段，对结构状态进行分析，基于冲击信号初始谱及剩余谱相关性分析，提出确定剩余自由响应阶段起始分析时间的确定方法。对该剩余响应信号结合频域窗滤波后进行谱分析，通过2轮试验中相同位置固有频率的改变，判断结构的状态变化。有效去除了某实测信号的零漂趋势项，确定了剩余自由响应阶段起始分析时间，基于频谱分析结果得到了某结构的状态变化。该分析可为复杂序贯试验过程中非平稳冲击情形下的关键结构状态监测及分析提供一种解决思路及方法。 |
| 英文摘要: |
| This paper is to analyze the status change of key structure through validity analysis and correction of pyrotechnic shock signal. The zero-shift trend item of an actual pyrotechnic shock signal and its velocity integral are corrected and eliminated based on discrete wavelet decomposition method. The residual free response stage after the shock is selected to analyze the structural state. Based on the initial spectrum of the shock signal and the correlation analysis of the residual spectrum, a method for determining the initial analysis time of the residual free response stage is proposed. The residual response signal is combined with frequency domain window filtering to perform spectral analysis, and the status change of the structure is judged by the change of the natural frequency at the same position in two tests. The zero-shift trend item of a measured signal is effectively eliminated, the critical analyzing time of residual free response stage is determined, and the structural status change is obtained by the spectrum analysis. This analysis can provide a solution idea and method for monitoring and analyzing the key structure state under pyrotechnic shock environment during the complex sequential tests. |
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