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Vibration responses characteristics of a Ginkgo biloba tree excited under harmonic excitation

The most effective method of the fruit harvesting is the mechanical harvest. The frequency spectrum of different testing positions on a Ginkgo biloba tree under the impact excitation was tested in the laboratory. The acceleration responses under the harmonic excitation were measured at the frequency...

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Detalles Bibliográficos
Autores principales: Lin, Huan, Sun, Leihou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8378724/
https://www.ncbi.nlm.nih.gov/pubmed/34415983
http://dx.doi.org/10.1371/journal.pone.0256492
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author Lin, Huan
Sun, Leihou
author_facet Lin, Huan
Sun, Leihou
author_sort Lin, Huan
collection PubMed
description The most effective method of the fruit harvesting is the mechanical harvest. The frequency spectrum of different testing positions on a Ginkgo biloba tree under the impact excitation was tested in the laboratory. The acceleration responses under the harmonic excitation were measured at the frequency of the peak and trough points in the frequency spectrum curves. Results of this research indicate that the frequency spectrum presented the consistency on the same branch but distinction among different branches. There was a correspondence between the frequency spectrum characteristics and the vibration responses. The vibration responses could be strengthened at the resonant frequency. Merely, the acceleration responses at low frequency were very weak. At higher frequency, the vibration responses were strong but presented different characteristics among different branches. The acceleration response on the trunk was always the weakest. On the same branch, the dynamic responses presented the similar characteristics and the acceleration amplitude increased gradually as the testing position was located away from the excitation point on the trunk. Among different branches, the strongest dynamic response appeared at different frequencies. Our results indicate that it was difficult to induce the strong vibration response of all the branches at the single frequency during the practical mechanical harvesting of fruits.
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spelling pubmed-83787242021-08-21 Vibration responses characteristics of a Ginkgo biloba tree excited under harmonic excitation Lin, Huan Sun, Leihou PLoS One Research Article The most effective method of the fruit harvesting is the mechanical harvest. The frequency spectrum of different testing positions on a Ginkgo biloba tree under the impact excitation was tested in the laboratory. The acceleration responses under the harmonic excitation were measured at the frequency of the peak and trough points in the frequency spectrum curves. Results of this research indicate that the frequency spectrum presented the consistency on the same branch but distinction among different branches. There was a correspondence between the frequency spectrum characteristics and the vibration responses. The vibration responses could be strengthened at the resonant frequency. Merely, the acceleration responses at low frequency were very weak. At higher frequency, the vibration responses were strong but presented different characteristics among different branches. The acceleration response on the trunk was always the weakest. On the same branch, the dynamic responses presented the similar characteristics and the acceleration amplitude increased gradually as the testing position was located away from the excitation point on the trunk. Among different branches, the strongest dynamic response appeared at different frequencies. Our results indicate that it was difficult to induce the strong vibration response of all the branches at the single frequency during the practical mechanical harvesting of fruits. Public Library of Science 2021-08-20 /pmc/articles/PMC8378724/ /pubmed/34415983 http://dx.doi.org/10.1371/journal.pone.0256492 Text en © 2021 Lin, Sun https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Lin, Huan
Sun, Leihou
Vibration responses characteristics of a Ginkgo biloba tree excited under harmonic excitation
title Vibration responses characteristics of a Ginkgo biloba tree excited under harmonic excitation
title_full Vibration responses characteristics of a Ginkgo biloba tree excited under harmonic excitation
title_fullStr Vibration responses characteristics of a Ginkgo biloba tree excited under harmonic excitation
title_full_unstemmed Vibration responses characteristics of a Ginkgo biloba tree excited under harmonic excitation
title_short Vibration responses characteristics of a Ginkgo biloba tree excited under harmonic excitation
title_sort vibration responses characteristics of a ginkgo biloba tree excited under harmonic excitation
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8378724/
https://www.ncbi.nlm.nih.gov/pubmed/34415983
http://dx.doi.org/10.1371/journal.pone.0256492
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