Research on Vibration Transmission Characteristics of Thrust Bearings in Rim-Driven Thrusters Based on Variational method

Research on Vibration Transmission Characteristics of Thrust Bearings in Rim-Driven Thrusters Based on Variational method | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Research on Vibration Transmission Characteristics of Thrust Bearings in Rim-Driven Thrusters Based on Variational method Hua Hu, Wenkai Jiang, Jing Zhang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8674956/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract With the advancement of shaft-less pump-jet technology, stringent requirements for vibration and noise reduction necessitate addressing excitations from flow non-uniformity and rotor imbalance which induce thrust oscillations and radiated noise. This study investigates the rotor vibration response under such excitations and the force transmission of thrust bearings to mitigate structural coupling. A transient rotor-bearing system model is established to compare the performance of water-lubricated tilting pad thrust bearings with spherical pivot versus rubber cushion supports. To accurately model transient bearing lubrication beyond traditional equivalent models, a computationally efficient semi-numerical semi-analytical method based on variational principles is introduced for solving the Reynolds equation. Noise measurements on a rim-driven thruster demonstrate differing acoustic radiation for each bearing configuration, validating the simulations. The results indicate that the bearing support design significantly influences vibration transmission and noise output, providing critical insights for optimizing the dynamic quietness of shaft-less. Physical sciences/Engineering Physical sciences/Mathematics and computing Physical sciences/Physics Water lubricated thrust bearings Variational method Rotor-bearing system Vibration Transmission Characteristics Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8674956","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":581221639,"identity":"7cde39b2-aac0-445c-8b80-b3632bb35816","order_by":0,"name":"Hua Hu","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA5klEQVRIiWNgGAWjYBACAwYeECkhx8/ewAYROkCUlgoLY8meAyRpOVORuGFGApFazCVyj0n8bJNg3CD5xuxxYRuDHN+NBMbPBXi0WM7IS5PsbZNgNpfOMTee2cZgLHkjgVl6Bj6H3cgxk+Btk2CznJ27TZq3jSFxw40ENmYeAlok/7ZJ8BjcPAvWUk+UFmmeMxISBjd4wVoSDAhqOfPG2FqmQsJAsif/m/SMcxKGM888bJbGq+V4juHNNwZ19f3sx9KkC8ps5PmOJx/8jE8LCmBmYJAAUowNxGoAaxkFo2AUjIJRgAkAP4hHrrAHW2EAAAAASUVORK5CYII=","orcid":"","institution":"Wuhan Polytechnic University","correspondingAuthor":true,"prefix":"","firstName":"Hua","middleName":"","lastName":"Hu","suffix":""},{"id":581221640,"identity":"8326a5b2-4ef6-4397-a5f5-52b507d028fb","order_by":1,"name":"Wenkai Jiang","email":"","orcid":"","institution":"Wuhan Polytechnic University","correspondingAuthor":false,"prefix":"","firstName":"Wenkai","middleName":"","lastName":"Jiang","suffix":""},{"id":581221641,"identity":"ae120926-169f-4bb0-a733-87877c3793cd","order_by":2,"name":"Jing Zhang","email":"","orcid":"","institution":"Wuhan Polytechnic University","correspondingAuthor":false,"prefix":"","firstName":"Jing","middleName":"","lastName":"Zhang","suffix":""}],"badges":[],"createdAt":"2026-01-23 04:38:35","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8674956/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8674956/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":106209297,"identity":"07fd7ba0-1454-4b95-9194-1619e73f8703","added_by":"auto","created_at":"2026-04-06 06:41:46","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":917400,"visible":true,"origin":"","legend":"","description":"","filename":"mainSR0124.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8674956/v1_covered_e462076c-c54b-4fef-85af-5dbe28f120ae.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Research on Vibration Transmission Characteristics of Thrust Bearings in Rim-Driven Thrusters Based on Variational method","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Water lubricated thrust bearings, Variational method;Rotor-bearing system, Vibration Transmission Characteristics","lastPublishedDoi":"10.21203/rs.3.rs-8674956/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8674956/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eWith the advancement of shaft-less pump-jet technology, stringent requirements for vibration and noise reduction necessitate addressing excitations from flow non-uniformity and rotor imbalance which induce thrust oscillations and radiated noise. 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