| 张玉杰,黄超广,孙仁俊.脉动压力风洞试验采样参数确定方法及应用[J].装备环境工程,2024,21(9):87-92. ZHANG Yujie,HUANG Chaoguang,SUN Renjun.A Method and Its Application to Determine the Sampling Parameters of Fluctuating Pressure Wind Tunnel Test[J].Equipment Environmental Engineering,2024,21(9):87-92. |
| 脉动压力风洞试验采样参数确定方法及应用 |
| A Method and Its Application to Determine the Sampling Parameters of Fluctuating Pressure Wind Tunnel Test |
| 投稿时间：2024-08-09 |
| DOI：10.7643/issn.1672-9242.2024.09.011 |
| 中文关键词: 脉动压力 风洞试验 采样频率 采样时间 相似比 振动响应中图分类号:TJ011 文献标志码:A 文章编号:1672-9242(2024)09-0087-06 |
| 英文关键词:fluctuating pressure wind tunnel test sampling frequency sampling time similarity ratio vibration response |
| 基金项目: |
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| Author | Institution |
| ZHANG Yujie | School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;AVIC The First Aircraft Institute, Xi'an 710089, China |
| HUANG Chaoguang | AVIC The First Aircraft Institute, Xi'an 710089, China |
| SUN Renjun | School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;AVIC The First Aircraft Institute, Xi'an 710089, China |
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| 中文摘要: |
| 综合考虑脉动压力风洞试验中的时间延迟效应，以及结构振动响应分析时截止频率相关要求，推导出采样频率的计算公式。依据统计学理论，推导特定置信度和准确度下的采样时间的计算公式，并计及结构振动响应计算中对频率分辨率的要求，建立采样时间的确定方法。从输入参数、计算过程和结果出发，建立了信号采样参数的确定流程。以飞机典型结构脉动压力风洞试验为例，对该方法进行了说明，分析了相似换算后结构原型的脉动压力功率谱密度，结果满足振动响应计算需求，表明所提采样参数确定方法可行有效。该方法理论依据明确，对脉动压力风洞试验设计具有指导意义。 |
| 英文摘要: |
| The work aims to deduce the formulae to calculate the sampling frequency by considering the time delay effect in the fluctuating pressure wind tunnel test and the cut-off frequency in the structural vibration response analysis. Based on the statistics theory, the formula used to predict the sampling time under the specific confidence level and accuracy degree was deduced and the requirement of frequency resolution in structural vibration response calculation was taken into account to establish the determination method of sampling time. Based on the input parameters, calculation process and results, the determination process of signal sampling parameters was established. With the fluctuating pressure wind tunnel test of typical aircraft structure as an example, this method was illustrated, and the power spectral density of fluctuating pressure of the prototype structure after similar conversion was analyzed. The results met the requirements of vibration response calculation, which showed that the proposed sampling parameter determination method was feasible and effective. The theoretical basis of this method is clear and it has guiding significance for the design of fluctuating pressure wind tunnel tests. |
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