Print Email Facebook Twitter The effect of floating deck structures on underwater radiated noise Title The effect of floating deck structures on underwater radiated noise Author Bosschaart, C. Jansen, H.W. de Jong, C.A.F. Basten, T. Contributor Gibbs, B. (editor) Publication year 2017 Abstract A concept for underwater machinery noise mitigation of future civil and military ships is the application of a common deck structure, supporting multiple machines, which is installed on resilient mounts on the ship's foundation structure. TNO is addressing the availability and testing of tools to be able to set realistic targets for the radiated noise signature and to verify future vessel designs against these targets. The TNO Assessment Model for Radiated Underwater Sound (AMRUS) is a semi-empirical prediction tool to predict separate contributions of different resiliently machinery noise sources to the underwater radiated noise at far field locations. It is a compilation of measured machinery source acceleration levels, mounting transfer and ship transfer functions, which are present in a large database. Until recently, the effect of resiliently mounted ('floating') deck structures on machinery noise transmission was not included in AMRUS. To be able to the support the complex design process of a floating deck, a formulation of the deck mount transfer function has been derived. For that purpose this formulation is split into the separate deck structure input and transfer mobilities, which can serve as acoustic indicators for a specific deck design during the specification, design and building phases. The formulation can be used to assess global design parameters of a deck in an early design phase, but can also serve as a base for finite element model results to determine the mount transfer function for a more detailed deck design. ANV; Cirrus Research Plc; Orion Subject 2015 Observation, Weapon & Protection SystemsAS - Acoustics & SonarTS - Technical SciencesFemNoise controlUnderwater radiated noise assessmentAcoustic noiseAcoustic noise measurementAcoustic variables controlAvailabilityBridge decksFinite element methodMachineryShipsStructural designTransfer functionsUnderwater acousticsAcoustic indicatorsAssessment modelsEarly design phaseFoundation structuresMultiple machineRadiated noiseTransfer mobilityUnderwater soundDecks (ship) To reference this document use: http://resolver.tudelft.nl/uuid:8d38f48c-503e-4ff7-9ee6-e6b8ae562c06 TNO identifier 781339 Publisher International Institute of Acoustics and Vibration, IIAV Source 24th International Congress on Sound and Vibration, ICSV 2017. 23 July 2017 through 27 July 2017 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.