A large-deflection deformation reconstruction method for semi-flexible plate nozzle based on strain-moment relationship

Q3 Engineering

西北工业大学学报 Pub Date : 2022-12-01 DOI:10.1051/jnwpu/20224061312

C. Yu, Zhili Zhang, Xuqing Nie, Long Zhang

{"title":"A large-deflection deformation reconstruction method for semi-flexible plate nozzle based on strain-moment relationship","authors":"C. Yu, Zhili Zhang, Xuqing Nie, Long Zhang","doi":"10.1051/jnwpu/20224061312","DOIUrl":null,"url":null,"abstract":"To enhance the health detection capability of the semi-flexible plate nozzle in a supersonic wind tunnel, a large-deflection deformation reconstruction algorithm for a semi-flexible plate nozzle based on the strain-moment relationship is developed. The multi-jack semi-flexible plate nozzle in the supersonic wind tunnel is studied; its mechanical model of contour assembly is established. The differential equation of flexible plate contour curve is deduced, and the elliptic integral expression of the flexible plate deformation is given. Based on the deformation theory of a rectangular thin plate, the deformation reconstruction algorithm is modified, and its correction effect is simulated and analysed with the finite element method. The maximum deviation after correction is only 10.78% compared with that before correction. The 0.3 m semi-flexible plate nozzle is used as the experimental platform to carry out the experimental study. The experimental results show that under the 6 Mach number, the large-deflection deformation reconstruction results based on strain-moment relationship are in good agreement with the experimental results. The coordinate deviation of the nozzle throat position is about 6.12% compared with the structural deformation, thus verifying that the deformation reconstruction algorithm in this paper is effective and accurate.","PeriodicalId":39691,"journal":{"name":"西北工业大学学报","volume":" ","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"西北工业大学学报","FirstCategoryId":"1093","ListUrlMain":"https://doi.org/10.1051/jnwpu/20224061312","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Engineering","Score":null,"Total":0}

引用次数: 0

Abstract

To enhance the health detection capability of the semi-flexible plate nozzle in a supersonic wind tunnel, a large-deflection deformation reconstruction algorithm for a semi-flexible plate nozzle based on the strain-moment relationship is developed. The multi-jack semi-flexible plate nozzle in the supersonic wind tunnel is studied; its mechanical model of contour assembly is established. The differential equation of flexible plate contour curve is deduced, and the elliptic integral expression of the flexible plate deformation is given. Based on the deformation theory of a rectangular thin plate, the deformation reconstruction algorithm is modified, and its correction effect is simulated and analysed with the finite element method. The maximum deviation after correction is only 10.78% compared with that before correction. The 0.3 m semi-flexible plate nozzle is used as the experimental platform to carry out the experimental study. The experimental results show that under the 6 Mach number, the large-deflection deformation reconstruction results based on strain-moment relationship are in good agreement with the experimental results. The coordinate deviation of the nozzle throat position is about 6.12% compared with the structural deformation, thus verifying that the deformation reconstruction algorithm in this paper is effective and accurate.

查看原文本刊更多论文

基于应变矩关系的半柔性板喷管大挠度变形重建方法

为了提高半柔性板喷管在超音速风洞中的健康检测能力，提出了一种基于应变-矩关系的半柔性板喷管大挠度变形重建算法。研究了超声速风洞中多孔半柔性板型喷管;建立了其轮廓装配的力学模型。推导了柔性板轮廓曲线的微分方程，给出了柔性板变形的椭圆积分表达式。基于矩形薄板的变形理论，对变形重建算法进行了改进，并用有限元法对其修正效果进行了仿真分析。校正后的最大偏差仅为校正前的10.78%。采用0.3 m半柔性板型喷嘴作为实验平台进行实验研究。实验结果表明，在6马赫数下，基于应变-矩关系的大挠度变形重建结果与实验结果吻合较好。与结构变形相比，喷管喉部位置的坐标偏差约为6.12%，从而验证了本文的变形重建算法的有效性和准确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊