Vibration isolation Performance of Disk-Type Permanent Magnetic Thrust Bearings in Propulsion Shaft Systems: A Comprehensive Study of Theories and Experiments

Vibration isolation Performance of Disk-Type Permanent Magnetic Thrust Bearings in Propulsion Shaft Systems: A Comprehensive Study of Theories and Experiments | 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 Research Article Vibration isolation Performance of Disk-Type Permanent Magnetic Thrust Bearings in Propulsion Shaft Systems: A Comprehensive Study of Theories and Experiments Rui Li, Chang Qi, Dong-Ming Guo, Wei Liu, Hao Chen, Liqiang Han, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6897140/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 Propulsion shaft systems using permanent magnetic thrust bearings (PMTBs) leverage non-contact magnetic interactions to enhance thrust transmission and provide superior longitudinal vibration isolation compared to traditional tilt-pad bearings. Cylinder-type PMTBs are commonly employed; however, their magnetic stiffness diminishes under high static loads, rendering them particularly suitable for heavy-load conditions. However, most propulsion systems operate under lower loads, requiring improved vibration isolation in light-load conditions. Disk-type PMTBs offer an effective solution, excelling in vibration isolation at light loads while maintaining load-bearing capacity. Since PMTBs are not yet widely used, research on disk-type PMTBs remains limited. This study investigates the load-bearing and vibration isolation performance of disk-type PMTBs, designing a bidirectional load-bearing configuration and exploring its mechanisms using the equivalent magnetic charge method. The results show that disk-type PMTBs have significantly lower magnetic stiffness than cylinder-type PMTBs under light loads, indicating better longitudinal vibration isolation. A dynamic model is developed using the harmonic balance method, with force transmissibility as the metric. Nonlinear dynamic responses of disk-type PMTBs under varying static and dynamic loads exhibit both hardening and softening behaviors. Experimental validation through harmonic excitation and white noise signals confirms the superior vibration isolation performance of disk-type PMTBs in light-load conditions. Vibration isolation Permanent magnetic thrust bearing Disk-type configuration Nonlinear vibration Harmonic balance method Experiment 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. 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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-6897140","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":478115280,"identity":"38aaaea8-d439-4777-8e1b-50faba70139c","order_by":0,"name":"Rui Li","email":"","orcid":"","institution":"Dalian University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Rui","middleName":"","lastName":"Li","suffix":""},{"id":478115282,"identity":"85f2087d-68fe-47f1-9cab-374f029b74a2","order_by":1,"name":"Chang Qi","email":"","orcid":"","institution":"Dalian University of 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Experiments","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":"Vibration isolation, Permanent magnetic thrust bearing, Disk-type configuration, Nonlinear vibration, Harmonic balance method, Experiment","lastPublishedDoi":"10.21203/rs.3.rs-6897140/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6897140/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003ePropulsion shaft systems using permanent magnetic thrust bearings (PMTBs) leverage non-contact magnetic interactions to enhance thrust transmission and provide superior longitudinal vibration isolation compared to traditional tilt-pad bearings. Cylinder-type PMTBs are commonly employed; however, their magnetic stiffness diminishes under high static loads, rendering them particularly suitable for heavy-load conditions. However, most propulsion systems operate under lower loads, requiring improved vibration isolation in light-load conditions. Disk-type PMTBs offer an effective solution, excelling in vibration isolation at light loads while maintaining load-bearing capacity. Since PMTBs are not yet widely used, research on disk-type PMTBs remains limited. This study investigates the load-bearing and vibration isolation performance of disk-type PMTBs, designing a bidirectional load-bearing configuration and exploring its mechanisms using the equivalent magnetic charge method. The results show that disk-type PMTBs have significantly lower magnetic stiffness than cylinder-type PMTBs under light loads, indicating better longitudinal vibration isolation. A dynamic model is developed using the harmonic balance method, with force transmissibility as the metric. Nonlinear dynamic responses of disk-type PMTBs under varying static and dynamic loads exhibit both hardening and softening behaviors. Experimental validation through harmonic excitation and white noise signals confirms the superior vibration isolation performance of disk-type PMTBs in light-load conditions.\u003c/p\u003e","manuscriptTitle":"Vibration isolation Performance of Disk-Type Permanent Magnetic Thrust Bearings in Propulsion Shaft Systems: A Comprehensive Study of Theories and Experiments","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-07-02 10:05:39","doi":"10.21203/rs.3.rs-6897140/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","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}}],"origin":"","ownerIdentity":"64d2c8cb-90a9-40d1-aa50-a1dc8af03861","owner":[],"postedDate":"July 2nd, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2025-08-05T23:38:19+00:00","versionOfRecord":[],"versionCreatedAt":"2025-07-02 10:05:39","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6897140","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6897140","identity":"rs-6897140","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}