Research on Optimal Curve Negotiation Speed of Straddle-Type Monorail Vehicles

Research on Optimal Curve Negotiation Speed of Straddle-Type Monorail Vehicles | 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 Optimal Curve Negotiation Speed of Straddle-Type Monorail Vehicles Zhouzhou Xu, Xuan Zhou, Zhen Yang, Xiaoxia Wen, Liang Xin This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9207476/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 8 You are reading this latest preprint version Abstract To ensure the safe, rapid, and stable curve negotiation of rail vehicles, the current approach typically equates the centrifugal force to the resultant force of the track support force and gravity. However, due to the use of pneumatic rubber tires, straddle-type monorail vehicles may experience unexpected yaw deviations caused by inconsistent tire deformations, ultimately affecting wheel-rail forces and dynamic performance. This paper analyzes the problem of bogie deviation from the ideal track path caused by inconsistent tire deformations, pointing out that the optimal speed should be higher than the theoretical value calculated using conventional railway vehicle methods. By employing the bogie roll angular velocity and the Sperling index W , this study investigates the bogie operating conditions and dynamic performance of the vehicle at different speeds through dynamic simulation. Based on the comprehensive research results, it is proposed that the optimal curve negotiation speed for a curve with a 10.2% superelevation and a 100-meter radius should be 38 km/h. Physical sciences/Engineering Physical sciences/Mathematics and computing Straddle-type monorail vehicle curve negotiation speed wheel-rail force dynamic performance Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Reviews received at journal 07 Apr, 2026 Reviewers agreed at journal 07 Apr, 2026 Reviewers agreed at journal 07 Apr, 2026 Reviewers invited by journal 07 Apr, 2026 Editor assigned by journal 07 Apr, 2026 Editor invited by journal 07 Apr, 2026 Submission checks completed at journal 28 Mar, 2026 First submitted to journal 28 Mar, 2026 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-9207476","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":619252058,"identity":"8fda9ca2-68a2-4702-b58e-8b1d0b934f07","order_by":0,"name":"Zhouzhou Xu","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA3ElEQVRIiWNgGAWjYBACfvb+BwYfKv4xy8sfPkCcFsmeMwyFM84cYDecwZZAnBaDGzkMn3nbDvAz3OAxINJlB3IPbuZtuyPNOLvn4403DHZyug0EdDA2nEs2nHPumTG7zNnNlnMYko3NDhDQwszYYGbwpow5mbEhd5s0D8OBxG2EtLAxM5j/4GFjrm84kPOMOC08bDwGhjxth5kZbuSwEadFgoctwXDGmTRmw55jxpZzDIjwi/39xweAUWnDLM/e/PDGmwo7OYJa0KwkNmqQtJCqYxSMglEwCkYEAAB5MEZ6L9xczwAAAABJRU5ErkJggg==","orcid":"","institution":"Chongqing Jiaotong University","correspondingAuthor":true,"prefix":"","firstName":"Zhouzhou","middleName":"","lastName":"Xu","suffix":""},{"id":619252063,"identity":"42f2c957-47ec-4cd4-be8f-3f4f82fe889e","order_by":1,"name":"Xuan Zhou","email":"","orcid":"","institution":"Chongqing Jiaotong University","correspondingAuthor":false,"prefix":"","firstName":"Xuan","middleName":"","lastName":"Zhou","suffix":""},{"id":619252071,"identity":"623397d4-7157-4b5a-8480-6db655d98f93","order_by":2,"name":"Zhen Yang","email":"","orcid":"","institution":"Chongqing Jiaotong University","correspondingAuthor":false,"prefix":"","firstName":"Zhen","middleName":"","lastName":"Yang","suffix":""},{"id":619252074,"identity":"83b8ea65-d80b-497b-8b5f-b3a8e536978e","order_by":3,"name":"Xiaoxia Wen","email":"","orcid":"","institution":"Chongqing Jiaotong University","correspondingAuthor":false,"prefix":"","firstName":"Xiaoxia","middleName":"","lastName":"Wen","suffix":""},{"id":619252080,"identity":"9820598e-c2f3-4658-b102-bb9f433f8738","order_by":4,"name":"Liang Xin","email":"","orcid":"","institution":"Chongqing Jiaotong University","correspondingAuthor":false,"prefix":"","firstName":"Liang","middleName":"","lastName":"Xin","suffix":""}],"badges":[],"createdAt":"2026-03-24 06:23:49","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-9207476/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-9207476/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":106960867,"identity":"407116de-c424-4e2d-9a01-44bc146c1ac9","added_by":"auto","created_at":"2026-04-15 09:23:28","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":741870,"visible":true,"origin":"","legend":"","description":"","filename":"RevisedManuscript668bee24.pdf","url":"https://assets-eu.researchsquare.com/files/rs-9207476/v1_covered_d06aafcf-26aa-48af-b467-04e793dfb37d.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Research on Optimal Curve Negotiation Speed of Straddle-Type Monorail Vehicles","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"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":"scientific-reports","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"scirep","sideBox":"Learn more about [Scientific Reports](http://www.nature.com/srep/)","snPcode":"","submissionUrl":"","title":"Scientific Reports","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Scientific Reports","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"Straddle-type monorail vehicle, curve negotiation speed, wheel-rail force, dynamic performance","lastPublishedDoi":"10.21203/rs.3.rs-9207476/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9207476/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eTo ensure the safe, rapid, and stable curve negotiation of rail vehicles, the current approach typically equates the centrifugal force to the resultant force of the track support force and gravity. However, due to the use of pneumatic rubber tires, straddle-type monorail vehicles may experience unexpected yaw deviations caused by inconsistent tire deformations, ultimately affecting wheel-rail forces and dynamic performance. This paper analyzes the problem of bogie deviation from the ideal track path caused by inconsistent tire deformations, pointing out that the optimal speed should be higher than the theoretical value calculated using conventional railway vehicle methods. By employing the bogie roll angular velocity and the Sperling index \u003cem\u003eW\u003c/em\u003e, this study investigates the bogie operating conditions and dynamic performance of the vehicle at different speeds through dynamic simulation. Based on the comprehensive research results, it is proposed that the optimal curve negotiation speed for a curve with a 10.2% superelevation and a 100-meter radius should be 38 km/h.\u003c/p\u003e","manuscriptTitle":"Research on Optimal Curve Negotiation Speed of Straddle-Type Monorail Vehicles","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-04-13 23:05:25","doi":"10.21203/rs.3.rs-9207476/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"editorInvitedReview","content":"","date":"2026-04-07T21:47:35+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"249910687396421834719496851511772504469","date":"2026-04-07T17:04:06+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"80775703659459430618632383018276056536","date":"2026-04-07T15:16:32+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2026-04-07T13:17:31+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2026-04-07T13:12:17+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"","date":"2026-04-07T09:07:21+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2026-03-28T07:46:46+00:00","index":"","fulltext":""},{"type":"submitted","content":"Scientific Reports","date":"2026-03-28T07:41:07+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"scientific-reports","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"scirep","sideBox":"Learn more about [Scientific Reports](http://www.nature.com/srep/)","snPcode":"","submissionUrl":"","title":"Scientific Reports","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Scientific Reports","inReviewEnabled":true,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"d122393c-ea41-4328-b1fc-4750654e7b2f","owner":[],"postedDate":"April 13th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[{"id":65894583,"name":"Physical sciences/Engineering"},{"id":65894584,"name":"Physical sciences/Mathematics and computing"}],"tags":[],"updatedAt":"2026-04-13T23:05:26+00:00","versionOfRecord":[],"versionCreatedAt":"2026-04-13 23:05:25","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-9207476","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-9207476","identity":"rs-9207476","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}