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4 Research products

  • European Marine Science
  • 2014-2023
  • Research software
  • Other research products
  • Fraunhofer-ePrints
  • European Marine Science

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  • Authors: Georgi, Tom; Troge, Jan; Lindner, Paul; Schulze, Christian; +1 Authors

    The acoustical impact of silencers is restricted by the influence of structure-borne sound. Thereby, excitation and radiation of structure-borne sound play an important role, as well as its transmission along the silencer system. In the design process of a silencer the influence of structure-borne sound on the damping effect is mostly considered by empirical estimations, which can cause an oversized construction. For calculating structure-borne sound in maritime silencers with their typical large dimensions, the application of statistical methods is a possible problem-solving approach. In this contribution, a new simulation and optimization tool is presented, considering the decreased damping effect of silencers due to structure-borne sound. The tool is based on Statistical Energy Analysis (SEA). Results of analytical and experimental SEA are compared. These results were obtained on downscaled silencers and have been transferred to real maritime silencers. Especially the SEA-parameters loss factor and coupling loss factor, airborne and structure-borne sound energies and the number of relevant modes are considered. Based on the measured damping of a silencer compared with numerical and statistical calculations, the capability for optimizing the design process of large silencers is shown.

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  • Authors: Nossol, Patryk;

    Beim Vortrag wurden Inhalte sowie Teilergebnisse der beiden Projekte ""CrashTex"" und ""CrashTex-II"" vorgestellt, die innerhalb des Leistungszentrums Smart Production durchgeführt worden sind. Das Ziel von CrashTex bestand darin Crash-Wirkprinzipien für Faserverbundmaterialien zu konzipieren, diese rechentechnisch sowie experimentell zu untersuchen und für eine Anwendung in PKW-Crashstrukturen zu optimieren. Diese Wirkprinzipien sollen auf einem ähnlichen Niveau wie Metall-Lösungen Crash-Energie aufnehmen und zugleich höhere Leichtbaugrade ermöglichen. Die Ergebnisse der Fraunhofer Untersuchungen zeigen hohe spezifische Energieabsorptionswerte (SEA-Werte) für CFK bei ausgewählten Crash-Wirkmechanismen und Lagenaufbau. Diese SEA-Werte übertreffen deutlich die Werte für Aluminium und ermöglichen somit höhere Leichtbaugrade bei zukünftigen Fahrzeug-Crash-Strukturen durch eine faserverbundgerechte Crash-Funktion. Somit wird der Bezug zum Cluster "Materials" des Leistungszentrums "Smart Production" geschaffen. Das Ziel des Vorhabens CrashTex-II besteht in der Gestaltung und Auslegung neuartiger Dachrahmen-, B-Säulen- und Schwellerstrukturen in hybrider Leichtbauweise, bestehend aus metallischer Hülle und innerer Faserverbundstruktur. Neben höheren Leichtbaugraden soll mit der neuen Bauweise auch eine verbesserte Adaptionsfähigkeit bezüglich verschiedener Fahrzeug- und Motorisierungsvarianten ermöglicht werden. Die konzipierten hybriden Seitenrahmenstrukturen ermöglichen höhere Leichtbaugrade bei zukünftigen Fahrzeug-Crash-Strukturen durch eine faserverbundgerechte Crash-Funktion. Somit wird auch hier der Bezug zum Cluster "Materials" des Leistungszentrums "Smart Production" geschaffen.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Lytra, Ioanna; Orlandi, Fabrizio; Maria-Esther Vidal;

    BigDataOcean - Exploiting Oceans of Data for Maritime Applications @EU Project Networking session of the 14th Extended Semantic Web Conference (ESWC'17)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ https://doi.org/10.5...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    https://doi.org/10.5281/zenodo...
    Other ORP type . 2017
    License: CC BY
    Data sources: Sygma
    Fraunhofer-ePrints
    Other ORP type . 2017
    Data sources: Fraunhofer-ePrints
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    citations0
    popularityAverage
    influenceAverage
    impulseAverage
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ https://doi.org/10.5...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      https://doi.org/10.5281/zenodo...
      Other ORP type . 2017
      License: CC BY
      Data sources: Sygma
      Fraunhofer-ePrints
      Other ORP type . 2017
      Data sources: Fraunhofer-ePrints
  • Authors: Spies, Martin; Rieder, Hans; Rauhaut, Markus; Kreier, Peter;

    In this contribution we concentrate on the detection and quantitative characterization of casting defects at the surface as well as in the near-surface and the bulk area. For ultrasonic inspection of the bulk material we employ mechanized scanning and defect reconstruction using the Synthetic Aperture Focusing Technique (SAFT). For the near-surface inspection we consider eddy current techniques to identify open or covered defects. Visual surface inspection based on optical systems and image processing complements our multi-sensor approach.

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The following results are related to European Marine Science. Are you interested to view more results? Visit OpenAIRE - Explore.
4 Research products
  • Authors: Georgi, Tom; Troge, Jan; Lindner, Paul; Schulze, Christian; +1 Authors

    The acoustical impact of silencers is restricted by the influence of structure-borne sound. Thereby, excitation and radiation of structure-borne sound play an important role, as well as its transmission along the silencer system. In the design process of a silencer the influence of structure-borne sound on the damping effect is mostly considered by empirical estimations, which can cause an oversized construction. For calculating structure-borne sound in maritime silencers with their typical large dimensions, the application of statistical methods is a possible problem-solving approach. In this contribution, a new simulation and optimization tool is presented, considering the decreased damping effect of silencers due to structure-borne sound. The tool is based on Statistical Energy Analysis (SEA). Results of analytical and experimental SEA are compared. These results were obtained on downscaled silencers and have been transferred to real maritime silencers. Especially the SEA-parameters loss factor and coupling loss factor, airborne and structure-borne sound energies and the number of relevant modes are considered. Based on the measured damping of a silencer compared with numerical and statistical calculations, the capability for optimizing the design process of large silencers is shown.

    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
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    more_vert
  • Authors: Nossol, Patryk;

    Beim Vortrag wurden Inhalte sowie Teilergebnisse der beiden Projekte ""CrashTex"" und ""CrashTex-II"" vorgestellt, die innerhalb des Leistungszentrums Smart Production durchgeführt worden sind. Das Ziel von CrashTex bestand darin Crash-Wirkprinzipien für Faserverbundmaterialien zu konzipieren, diese rechentechnisch sowie experimentell zu untersuchen und für eine Anwendung in PKW-Crashstrukturen zu optimieren. Diese Wirkprinzipien sollen auf einem ähnlichen Niveau wie Metall-Lösungen Crash-Energie aufnehmen und zugleich höhere Leichtbaugrade ermöglichen. Die Ergebnisse der Fraunhofer Untersuchungen zeigen hohe spezifische Energieabsorptionswerte (SEA-Werte) für CFK bei ausgewählten Crash-Wirkmechanismen und Lagenaufbau. Diese SEA-Werte übertreffen deutlich die Werte für Aluminium und ermöglichen somit höhere Leichtbaugrade bei zukünftigen Fahrzeug-Crash-Strukturen durch eine faserverbundgerechte Crash-Funktion. Somit wird der Bezug zum Cluster "Materials" des Leistungszentrums "Smart Production" geschaffen. Das Ziel des Vorhabens CrashTex-II besteht in der Gestaltung und Auslegung neuartiger Dachrahmen-, B-Säulen- und Schwellerstrukturen in hybrider Leichtbauweise, bestehend aus metallischer Hülle und innerer Faserverbundstruktur. Neben höheren Leichtbaugraden soll mit der neuen Bauweise auch eine verbesserte Adaptionsfähigkeit bezüglich verschiedener Fahrzeug- und Motorisierungsvarianten ermöglicht werden. Die konzipierten hybriden Seitenrahmenstrukturen ermöglichen höhere Leichtbaugrade bei zukünftigen Fahrzeug-Crash-Strukturen durch eine faserverbundgerechte Crash-Funktion. Somit wird auch hier der Bezug zum Cluster "Materials" des Leistungszentrums "Smart Production" geschaffen.

    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Lytra, Ioanna; Orlandi, Fabrizio; Maria-Esther Vidal;

    BigDataOcean - Exploiting Oceans of Data for Maritime Applications @EU Project Networking session of the 14th Extended Semantic Web Conference (ESWC'17)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ https://doi.org/10.5...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    https://doi.org/10.5281/zenodo...
    Other ORP type . 2017
    License: CC BY
    Data sources: Sygma
    Fraunhofer-ePrints
    Other ORP type . 2017
    Data sources: Fraunhofer-ePrints
    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ https://doi.org/10.5...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      https://doi.org/10.5281/zenodo...
      Other ORP type . 2017
      License: CC BY
      Data sources: Sygma
      Fraunhofer-ePrints
      Other ORP type . 2017
      Data sources: Fraunhofer-ePrints
  • Authors: Spies, Martin; Rieder, Hans; Rauhaut, Markus; Kreier, Peter;

    In this contribution we concentrate on the detection and quantitative characterization of casting defects at the surface as well as in the near-surface and the bulk area. For ultrasonic inspection of the bulk material we employ mechanized scanning and defect reconstruction using the Synthetic Aperture Focusing Technique (SAFT). For the near-surface inspection we consider eddy current techniques to identify open or covered defects. Visual surface inspection based on optical systems and image processing complements our multi-sensor approach.

    0
    citations0
    popularityAverage
    influenceAverage
    impulseAverage
    BIP!Powered by BIP!
    more_vert
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