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Characterizing vibrational behavior of a large airship based on scaled model test and analysis

Mingxuan Xu (State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, China and Research Department of Structural Strength, China Special Vehicle Research Institute, Jingmen, China)
Tao Jin (Research Department of Structural Strength, China Special Vehicle Research Institute, Jingmen, China)
Weihong Kong (Research Department of Structural Strength, China Special Vehicle Research Institute, Jingmen, China)
Yazhi Li (School of Aeronautics, Northwestern Polytechnical University, Xi'an, China)
Xing Shen (State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Cheng Liu (School of Aeronautics, Northwestern Polytechnical University, Xi'an, China)
Tianyang Zhu (School of Aeronautics, Northwestern Polytechnical University, Xi'an, China)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 24 November 2022

Issue publication date: 14 February 2023

54

Abstract

Purpose

This study aims to assess the vibrational behavior of a large transport airship based on finite element (FE) simulation and modal testing of its scaled model.

Design/methodology/approach

A full-size parametric FE model of the airframe was established according to the structural layout of the composite beam-cable airframe of the airship, and vibrational analysis of the airframe was conducted. The influence of cable pre-tension load on the inherent properties of the airframe was investigated. Based on the simplification of the full-size FE model, scaled numerical and test models of the airframe, with a geometric scale factor of 1:50, were established and built.

Findings

The simulation and test results of the scaled models indicated that the mode shapes of the full-size and scaled models were similar. The natural frequencies of both the full-size and scaled models complied with the theoretical similarity relation of the frequency response.

Originality/value

This study demonstrated that the vibrational test results of the scaled model with very large scaling can be used to characterize the modal properties of the beam-cable airframe of a large transport airship.

Keywords

Acknowledgements

This paper was written thanks for the project “Research on Cargo Airships Safety in the loading/unloading stage (No2016YFE0114000)” funded from China Science and Technology Exchange Center.

Ethical compliance: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Citation

Xu, M., Jin, T., Kong, W., Li, Y., Shen, X., Liu, C. and Zhu, T. (2023), "Characterizing vibrational behavior of a large airship based on scaled model test and analysis", Aircraft Engineering and Aerospace Technology, Vol. 95 No. 4, pp. 668-683. https://doi.org/10.1108/AEAT-01-2022-0008

Publisher

:

Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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