| 邹学利,张国强,王刚,张生鹏.随机数据相干函数谱的归纳处理方法研究[J].装备环境工程,2021,18(4):88-95. ZOU Xue-li,ZHANG Guo-qiang,WANG Gang,ZHANG Sheng-peng.Research on Inductive Method of Random Data Coherence Function Spectrum[J].Equipment Environmental Engineering,2021,18(4):88-95. |
| 随机数据相干函数谱的归纳处理方法研究 |
| Research on Inductive Method of Random Data Coherence Function Spectrum |
| 投稿时间：2020-09-03 修订日期：2020-10-20 |
| DOI：10.7643/issn.1672-9242.2021.04.013 |
| 中文关键词: 多轴振动 多点激励 相干函数 归纳处理 统计容差法中图分类号:TB114 文献标识码:A 文章编号:1672-9242(2021)04-0088-08 |
| 英文关键词:multi-axis vibration multi-support excitation coherence function inductive method statistical tolerance method |
| 基金项目:十三五装备预研联合基金(6141B070204) |
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| 中文摘要: |
| 目的 研究相干函数谱的归纳处理方法，提高多点多轴振动试验对实际环境模拟的真实性。方法 通过对相干函数统计分布规律的分析，提出一种基于实测数据的制定相干函数谱的统计容差法，考虑到相干函数对试验量级影响的特殊性，没有采用传统的容差上限分析法，而是对相干函数的容差区间进行分析，并给出相干函数容差上限谱和容差下限谱的制定方法。结果 利用该方法对某型号产品的实测数据表明，该方法有效可行。结论 采用容差区间估计法，降低了相干函数的试验值与实测值的误差，达到了提高试验环境对实际环境模拟真实度的要求。 |
| 英文摘要: |
| In order to study the inductive method of coherence function spectrum and improve the authenticity of multi-support and multi-axial vibration test on simulating real environment.By analyzing the statistical distribution law of coherence function, this paper proposes a statistical tolerance method based on measured data to formulate coherence function spectrum. Because of the particularity of the influence of coherence function on the experimental magnitude, the tolerance interval of coherence function is analyzed instead of the traditional method of analyzing upper limit of tolerance, and the method of upper and lower tolerance spectra of coherence function are given.The experimental data of a certain type of product shows that the method is effective and feasible. By using the method of tolerance interval estimation, the error between the experimental value and the measured value of the coherence function is reduced, and the requirement of improving the authenticity of the experimental environment to the actual environment simulation is achieved. |
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