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    <pageNumber>14 Seiten</pageNumber>
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    <publishedDate>2025-04-16</publishedDate>
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    <title language="eng">Eigenvalue perturbation in drivetrain analysis and optimization</title>
    <abstract language="eng">The optimization of the dynamic behavior of drive systems often involves targeted modifications of the system characteristics. Structural and parametric modifications are used to satisfy the constraints of the dynamic requirements. However, many optimizations are still achieved by intuition or parameter variations, even though more streamlined and easy-to-implement tools such as the eigenvalue perturbation method are available. In this article, the eigenvalue perturbation method in the form of an eigenvalue sensitivity analysis is used to efficiently optimize the dynamic behavior for two different use cases using different optimization measures. This paper demonstrates, how eigenvalue perturbation theory can efficiently optimize drivetrain dynamics by systematically modifying system parameters. Two case studies show how eigenvalue sensitivity analysis achieves targeted frequency shifts to avoid resonances: (1) adapting shaft stiffness and control parameters in a torsional drivetrain, and (2) optimizing structural modifications in a wind turbine bedplate. The study introduces the eigenvector tensor product as a weighting matrix, identifying key parameters for effective redesign. Compared to conventional parameter studies, this method enables precise control over system dynamics with minimal computational effort, making it highly applicable for vibration mitigation and drivetrain optimization.</abstract>
    <identifier type="doi">10.21203/rs.3.rs-6368754/v1</identifier>
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    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Carsten Schulz</author>
    <author>Henry Graneß</author>
    <author>Stefan Weinzierl</author>
    <author>Johannes Nicklas</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="othforschungsschwerpunkt" number="16316">Produktion und Systeme</collection>
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  <doc>
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    <publishedYear>2025</publishedYear>
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    <language>eng</language>
    <pageFirst/>
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    <pageNumber>16</pageNumber>
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    <type>article</type>
    <publisherName>Springer</publisherName>
    <publisherPlace>Cham</publisherPlace>
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    <title language="eng">Prediction of the wear behavior of a conveyor belt with flexible rollers</title>
    <abstract language="eng">This paper introduces a method to predict wear behavior in conveyor belt systems using a lumped mass modeling approach. While previous research has focused primarily on lateral belt walking, this study shifts attention to belt deformation and its associated wear. Both significantly affect system efficiency and component lifespan. The authors propose using local frictional power as a wear indicator, leveraging its direct relation to frictional work in established wear models. To solely demonstrate the method, the study simulates a conveyor belt with three flexible rollers and a deformable belt modeled through rigid spheres connected by spring-damper elements. The authors visualize frictional power density across the belt width, distinguishing between running and transverse directions. The results demonstrate that the frictional power distribution depends heavily on discretization quality, particularly due to the polygon effect inherent in the lumped mass approach. A convergence analysis reveals the minimum necessary discretization of the belt, ensuring reliable qualitative results. To support the credibility of the work, this study compares theoretical expectations and initial wear observations from a real belt with the results from the shown approach. The plausibility check already shows promising results. The proposed methodology provides an adaptable framework to evaluate wear in belt-like structures. It can be readily adapted to a variety of multibody dynamics applications and integrated into larger MBS models that include the overall drivetrain and engine control. Future work will focus on refining discretization strategies and contact models, as well as validation of the wear model to enable quantitative predictions.</abstract>
    <parentTitle language="eng">Multibody System Dynamics</parentTitle>
    <identifier type="issn">1384-5640</identifier>
    <identifier type="doi">10.1007/s11044-025-10097-7</identifier>
    <note>Die Preprint-Version ist ebenfalls in diesem Repositorium verzeichnet: https://opus4.kobv.de/opus4-oth-regensburg/8194</note>
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    <enrichment key="CorrespondingAuthor">Vogl, Yannick</enrichment>
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    <author>Yannick Vogl</author>
    <author>Carsten Schulz</author>
    <author>Thomas Schaeffer</author>
    <author>Benjamin Geiger</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
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  <doc>
    <id>8488</id>
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    <language>eng</language>
    <pageFirst>170</pageFirst>
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    <publisherName>Springer</publisherName>
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    <contributingCorporation>TMS</contributingCorporation>
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    <title language="eng">Impact of hatching strategy on mechanical properties and residual stresses in additively manufactured AlSi10Mg components</title>
    <abstract language="eng">This study examines the impact of different hatching strategies on the mechanical and technological properties, as well as the manufacturing-induced residual stresses of additively manufactured AlSi10Mg components produced using Laser Powder Bed Fusion (LPBF). For the sample production, parallel and orthogonal hatching patterns were employed at various rotation angles, leading to differences in the mechanical properties of the components. The parallel structure exhibits significantly higher compressive residual stresses in the near-surface areas of the component, up to 33% greater than those observed in the orthogonal structure. These compressive residual stresses could counteract operational tensile stresses, potentially enhancing the load-bearing capacity of the component. The findings of this study provide insights into the targeted use of hatching strategies to optimize the mechanical properties and lifespan of components. Future works should focus on experimentally validating the simulation results using the core hole method to further improve the correlation between numerical models and actual stress distributions.</abstract>
    <parentTitle language="eng">TMS 2025 154th annual meeting &amp; exhibition supplemental proceedings</parentTitle>
    <identifier type="isbn">9783031807473</identifier>
    <identifier type="issn">2367-1181</identifier>
    <identifier type="doi">10.1007/978-3-031-80748-0_15</identifier>
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    <author>Sebastian Gersch</author>
    <author>Carsten Schulz</author>
    <author>Jörg Bagdahn</author>
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  <doc>
    <id>8194</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>17 Seiten</pageNumber>
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    <issue/>
    <volume/>
    <type>preprint</type>
    <publisherName>Research Square Platform LLC</publisherName>
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    <completedDate>--</completedDate>
    <publishedDate>2025-04-03</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Prediction of the wear behavior of a conveyor belt with flexible rollers</title>
    <abstract language="eng">This paper introduces a method to predict wear behavior in conveyor belt systems using a lumped mass modeling approach. While previous research has focused primarily on lateral belt walking, this study shifts attention to belt deformation and its associated wear. Both significantly affect system efficiency and component lifespan. The authors propose using local frictional power as a wear indicator, leveraging its direct relation to frictional work in established wear models. To validate the method, the study simulates a conveyor belt with three flexible rollers and a deformable belt modeled through rigid spheres connected by spring-damper elements. The authors quantify and visualize frictional power density across the belt width, distinguishing between running and transverse directions. The results demonstrate that the frictional power distribution depends heavily on discretization quality, particularly due to the polygon effect inherent in the lumped mass approach. A convergence analysis reveals a minimum discretization of nine sphere rows with 557 spheres per row to achieve reliable qualitative insights. This method enables researchers to evaluate wear distribution in flexible conveyor systems and adapt the approach for broader applications in multibody dynamics. Future work should refine discretization techniques and friction models to enhance quantitative accuracy.</abstract>
    <identifier type="doi">10.21203/rs.3.rs-6343500/v1</identifier>
    <note>Der Aufsatz wurde peer-reviewed veröffentlicht und ist ebenfalls in diesem Repositorium verzeichnet unter: https://opus4.kobv.de/opus4-oth-regensburg/8489</note>
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    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Yannick Vogl</author>
    <author>Carsten Schulz</author>
    <author>Thomas Schaeffer</author>
    <author>Benjamin Geiger</author>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="othforschungsschwerpunkt" number="16316">Produktion und Systeme</collection>
    <collection role="institutes" number="">Labor Mehrkörpersimulation (MKS)</collection>
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