A new dynamic modelling methodology of a force measuring system for hypersonic impulse wind tunnel

被引：8
|
作者：
Li, Shichao [1 ]
Li, Kesi [1 ]
Liu, Bokai [1 ]
Gao, Hongli [1 ]
Sun, Yi [1 ]
Dai, Zhikun [1 ]
Liu, Weixiong [2 ]
机构：
[1] Southwest Jiaotong Univ, Chengdu 610031, Sichuan, Peoples R China
[2] China Aerodynam Res & Dev Ctr, Mianyang 621000, Sichuan, Peoples R China
来源：
MEASUREMENT | 2020年 / 164卷
基金：
中国国家自然科学基金;
关键词：
Wind tunnel force test; Force measuring system; Joints; Dynamic modelling; Finite elements; CONTACT; JOINTS; IDENTIFICATION; PARAMETERS;
D O I：
10.1016/j.measurement.2020.108012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper aims to improve the dynamic modeling accuracy of the whole complex assembly of the wind tunnel measuring system. First, an analytical formula describing the relationship between dynamic characteristics and test accuracy of the force measuring system (FMS) is derived, and the influence of dynamic characteristics on test accuracy is analyzed. Subsequently, the method of single component modeling in FMS is elaborated. Furthermore, a modeling of bolted joint based on uneven contact surface-pressure distribution is proposed. In order to verify the effectiveness of FMS dynamic modeling method proposed in this research, the calculated and experimental modes are compared. Comparison results show that these two modal modes of each order are very similar, and the error range of frequency between them is 0.5%-13.4%. Finally, the theoretical results are in good agreement with the experimental results, which confirms the validity of the proposed modeling method. (C) 2020 Elsevier Ltd. All rights reserved.
引用
收藏
页数：15
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