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 Systems
AS - Acoustics & Sonar
TS - Technical Sciences
Fem
Noise control
Underwater radiated noise assessment
Acoustic noise
Acoustic noise measurement
Acoustic variables control
Availability
Bridge decks
Finite element method
Machinery
Ships
Structural design
Transfer functions
Underwater acoustics
Acoustic indicators
Assessment models
Early design phase
Foundation structures
Multiple machine
Radiated noise
Transfer mobility
Underwater sound
Decks (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