Frequency response function analysis of flanged cylindrical shell structure with uncertainty of bolted connection stiffness

被引：0
作者：
Li K. [1 ]
Zeng J. [1 ]
Yu M.-Y. [1 ]
Ma H. [1 ,2 ]
Chai Q.-D. [1 ]
机构：
[1] School of Mechanical Engineering & Automation, Northeastern University, Shenyang
[2] Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China, Northeastern University, Shenyang
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2020年 / 33卷 / 03期
关键词：
Connection stiffness; Cylindrical shell; Frequency response function; Interval analysis method; Uncertainty;
D O I：
10.16385/j.cnki.issn.1004-4523.2020.03.010
中图分类号：
学科分类号：
摘要：
In this paper, an interval analysis method using Chebyshev polynomial surrogate model is proposed to analyze the uncertainty of the frequency response function (FRF) of bolted joined cylindrical shell with flange. Firstly, the dynamic model of cylindrical shell with flange is established by 8-node degenerated shell element, and FRF of the system is solved. The model is verified by comparing with FRF of the experimental test. Then, Chebyshev polynomial surrogate model of FRF with interval parameters is established based on interval analysis method. Finally, considering the uncertainty of bolted connection stiffness of flange-cylindrical shell, the interval range of FRF of single direction and multi-direction is solved, and the Monte-Carlo simulation (MCS) issued to verify the accuracy and efficiency of the solution. The results show that the Chebyshev polynomial surrogate model has higher solution accuracy and calculation efficiency, the uncertainty of axis connection stiffness has the biggest influence on FRF of the system. The bolted connection stiffness mainly results larger resonance bands at the first and the third natural frequencies of the system. © 2020, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：517 / 524
页数：7
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