{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,15]],"date-time":"2026-02-15T09:30:07Z","timestamp":1771147807995,"version":"3.50.1"},"reference-count":51,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,3,29]],"date-time":"2021-03-29T00:00:00Z","timestamp":1616976000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Program on Industrial Technology System of National Rice (CN)","award":["CARS-01-44"],"award-info":[{"award-number":["CARS-01-44"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The longitudinal axial flow threshing cylinder of the full feeding rice combine harvester is widely used in China and works with violent vibration. To explore the source of the excitation affecting the vibration and to reduce the vibration, a finite element modal analysis and multipoint input and multipoint output (MIMO) modal test were performed to solve the natural vibration characteristics. By analyzing the excitation frequency, we concluded that the main reason for the resonance was the coupling between the rotation frequency of the threshing cylinder and the first natural frequency. To avoid the influence of resonance and realize a lightweight design, we proposed a combination of size optimization and topology optimization. The second rotation orthogonal combination test was designed to analyze the first natural frequency, maximum stress, and maximum deformation of the threshing cylinder, and the threshing cylinder was reconstructed as a central symmetrical structure to balance the rotational inertia force. The field experiment results showed that the amplitudes of the optimized threshing cylinder were significantly lower than those of the original threshing cylinder. This study provides ideas for solving the vibration characteristics of rotating parts and provides an important reference for the design of vibration reduction and weight reduction of key parts in the field of agricultural machinery.<\/jats:p>","DOI":"10.3390\/sym13040571","type":"journal-article","created":{"date-parts":[[2021,3,29]],"date-time":"2021-03-29T16:01:57Z","timestamp":1617033717000},"page":"571","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Vibration Analysis and Parameter Optimization of the Longitudinal Axial Flow Threshing Cylinder"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4671-4338","authenticated-orcid":false,"given":"Jinwu","family":"Wang","sequence":"first","affiliation":[{"name":"College of Engineering, Northeast Agricultural University, Harbin 150030, China"}]},{"given":"Changsu","family":"Xu","sequence":"additional","affiliation":[{"name":"College of Engineering, Northeast Agricultural University, Harbin 150030, China"}]},{"given":"Yanan","family":"Xu","sequence":"additional","affiliation":[{"name":"College of Engineering, Northeast Agricultural University, Harbin 150030, China"}]},{"given":"Xin","family":"Qi","sequence":"additional","affiliation":[{"name":"College of Engineering, Northeast Agricultural University, Harbin 150030, China"}]},{"given":"Ziming","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Engineering, Northeast Agricultural University, Harbin 150030, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6183-3899","authenticated-orcid":false,"given":"Han","family":"Tang","sequence":"additional","affiliation":[{"name":"College of Engineering, Northeast Agricultural University, Harbin 150030, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"377","DOI":"10.5109\/24340","article-title":"Development of design theory on the tooth arrangement and the threshing drum for a large-sized and high-speed head-feeding combine","volume":"44","author":"Choe","year":"2000","journal-title":"J. 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