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Experimental Study on Dynamic Responses Characteristics of Straight Pipe Under Equidirectional Two-Point Excitations

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Abstract

Aircraft pipelines are often subjected to multi-point excitations. In this paper, the dynamic acceleration and strain responses of the straight pipe under two-point excitations (TPE) in the same direction are studied by experiment. Firstly, the harmonic response characteristics of the first-order, second-order resonant frequency and non-resonant frequency of the straight pipe under single-point excitation (SPE) are obtained. Then, the dynamic responses of the straight pipe under three TPE conditions including the same frequency and the same amplitude (SFSA), the same frequency and different amplitude (SFDA), and the different frequency and different amplitude (DFDA) are tested. By comparing the maximum response position and amplitude of SPE and TPE-SFSA, it is found that the response of TPE is 30% higher than that of SPE at non-resonant frequency, and they are close at resonance. Moreover, the effects of excitation frequencies and amplitudes of TPE on the pipe’s maximum response are analyzed. The pipe-shaped amplitude diagrams of pipe acceleration and strain under different excitation conditions are obtained. Finally, it is found that the excitation combination of the first-order resonance frequency under TPE-SFDA has the greatest influence on the vibration response of the straight pipe structure. It provides a reference for the reliability evaluation of aircraft pipeline under multi-points excitations.

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Acknowledgements

This project is supported by National Natural Science Foundation of China (Grant No. 51875460) and the Aviation Foundation of China (Grant No. 2018ZB53016).

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Authors and Affiliations

  1. Department of Engineering Mechanics, Northwestern Polytechnical University, Xi’an, 710129, China

    Hongyan Zhu, Wei Liu, Meng Wu, Wangzhen Li & Zhufeng Yue

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  1. Hongyan Zhu
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  2. Wei Liu
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  3. Meng Wu
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  4. Wangzhen Li
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  5. Zhufeng Yue
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Correspondence to Wei Liu.

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Zhu, H., Liu, W., Wu, M. et al. Experimental Study on Dynamic Responses Characteristics of Straight Pipe Under Equidirectional Two-Point Excitations. Iran J Sci Technol Trans Mech Eng 47, 1235–1249 (2023). https://doi.org/10.1007/s40997-022-00577-y

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  • DOI: https://doi.org/10.1007/s40997-022-00577-y

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