{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T07:20:25Z","timestamp":1768720825309,"version":"3.49.0"},"reference-count":32,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2023,11,1]],"date-time":"2023-11-01T00:00:00Z","timestamp":1698796800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100018537","name":"National Science and Technology Major Project","doi-asserted-by":"publisher","award":["Y2019-VIII-0011-0172"],"award-info":[{"award-number":["Y2019-VIII-0011-0172"]}],"id":[{"id":"10.13039\/501100018537","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100018537","name":"National Science and Technology Major Project","doi-asserted-by":"publisher","award":["P2021-A-I-002-002"],"award-info":[{"award-number":["P2021-A-I-002-002"]}],"id":[{"id":"10.13039\/501100018537","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Science Center for Gas Turbine Project","award":["Y2019-VIII-0011-0172"],"award-info":[{"award-number":["Y2019-VIII-0011-0172"]}]},{"name":"Science Center for Gas Turbine Project","award":["P2021-A-I-002-002"],"award-info":[{"award-number":["P2021-A-I-002-002"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Contemporary aero-engines aim for enhanced efficiency and weight reduction. They are designed to increase rotor operational speed while reducing rotor bending stiffness. This may result in bending deformation in rotor systems within the operational speed range. Such deformation can change the relative positions of rotor components, potentially causing increased mass asymmetry or unbalance. Traditional rotor dynamic models typically assume a constant rotor state. They approximate unbalance using constant mass eccentricities at certain rotor cross-sections. However, this approach has its limitations. This paper focuses on a high-speed jointed rotor system. A distributed rotational inertia load excitation model is proposed. This model explicitly considers the rotor\u2019s variable unbalance state at different operational speeds. The study involves both simulations and experimental investigations. The results show that at high speeds, bending deformation causes the unbalance and rotational inertia load to shift from a concentrated to a distributed state. Notably, the localized rotational inertia moment from thin-disk components like turbine disks becomes significant at high speeds. This results in a rapid increase in bearing load with rotational speed. It also profoundly affects the rotor\u2019s joints, causing interfacial slip and sudden changes in rotor vibration characteristics.<\/jats:p>","DOI":"10.3390\/sym15112009","type":"journal-article","created":{"date-parts":[[2023,11,1]],"date-time":"2023-11-01T07:24:04Z","timestamp":1698823444000},"page":"2009","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Distributed Rotational Inertia Load Excitation Model and Its Impact on High-Speed Jointed Rotor Dynamic Response"],"prefix":"10.3390","volume":"15","author":[{"given":"Fayong","family":"Wu","sequence":"first","affiliation":[{"name":"School of Energy and Power Engineering, Beihang University, Beijing 102206, China"},{"name":"Shenyang Engine Design and Research Institute, Aero Engine Corporation of China, Shenyang 110015, China"}]},{"given":"Jie","family":"Hong","sequence":"additional","affiliation":[{"name":"School of Energy and Power Engineering, Beihang University, Beijing 102206, China"},{"name":"Research Institute of Aero-Engine, Beihang University, Beijing 102206, China"}]},{"given":"Xueqi","family":"Chen","sequence":"additional","affiliation":[{"name":"Research Institute of Aero-Engine, Beihang University, Beijing 102206, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,11,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"304","DOI":"10.1080\/14786440308635889","article-title":"The lateral vibration of loaded shafts in the neighbourhood of a whirling speed\u2014The effect of want of balance","volume":"37","author":"Jeffcott","year":"1919","journal-title":"Lond. 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