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Squid-inspired vehicle design using coupled fluid-solid analytical modelling

Squid-inspired vehicle design using coupled fluid-solid analytical modelling
Squid-inspired vehicle design using coupled fluid-solid analytical modelling
The need for enhanced automation in the marine and maritime fields is fostering research into robust and highly manoeuvrable autonomous underwater vehicles. To address these needs we develop design principles for a new generation of soft-bodied aquatic vehicles similar to octopi and squids. In particular, we consider the capability of pulsed-jetting bodies to boost thrust by actively modifying their external body-shape and in this way benefit of the contribution from added-mass variation. We present an analytical formulation of the coupled fluid-structure interaction between the elastic body and the ambient fluid. The model incorporates a number of new salient contributions to the soft-body dynamics. We highlight the role of added-mass variation effects of the external fluid in enhancing thrust and assess how the shape-changing actuation is impeded by a confinement-related unsteady inertial term and by an external shape-dependent fluid stiffness contribution. We show how the analysis of these combined terms has guided us to the design of a new prototype of a squid-inspired vehicle and to the tuning of the natural frequency of the coupled fluid-solid system with the purpose of optimizing its actuation routine.
Giorgio-Serchi, Francesco
8571dc14-19c1-4ed1-8080-d380736a6ffa
Weymouth, Gabriel
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0
Giorgio-Serchi, Francesco
8571dc14-19c1-4ed1-8080-d380736a6ffa
Weymouth, Gabriel
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0

Giorgio-Serchi, Francesco and Weymouth, Gabriel (2017) Squid-inspired vehicle design using coupled fluid-solid analytical modelling. 70th Annual Meeting of the American Physical Society Division of Fluid Dynamics, Denver, United States. 19 - 21 Nov 2017.

Record type: Conference or Workshop Item (Other)

Abstract

The need for enhanced automation in the marine and maritime fields is fostering research into robust and highly manoeuvrable autonomous underwater vehicles. To address these needs we develop design principles for a new generation of soft-bodied aquatic vehicles similar to octopi and squids. In particular, we consider the capability of pulsed-jetting bodies to boost thrust by actively modifying their external body-shape and in this way benefit of the contribution from added-mass variation. We present an analytical formulation of the coupled fluid-structure interaction between the elastic body and the ambient fluid. The model incorporates a number of new salient contributions to the soft-body dynamics. We highlight the role of added-mass variation effects of the external fluid in enhancing thrust and assess how the shape-changing actuation is impeded by a confinement-related unsteady inertial term and by an external shape-dependent fluid stiffness contribution. We show how the analysis of these combined terms has guided us to the design of a new prototype of a squid-inspired vehicle and to the tuning of the natural frequency of the coupled fluid-solid system with the purpose of optimizing its actuation routine.

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More information

Published date: 2017
Venue - Dates: 70th Annual Meeting of the American Physical Society Division of Fluid Dynamics, Denver, United States, 2017-11-19 - 2017-11-21

Identifiers

Local EPrints ID: 414141
URI: http://eprints.soton.ac.uk/id/eprint/414141
PURE UUID: 8bb97540-d277-436a-9a52-0ddb5e216ad4
ORCID for Francesco Giorgio-Serchi: ORCID iD orcid.org/0000-0002-5090-9007
ORCID for Gabriel Weymouth: ORCID iD orcid.org/0000-0001-5080-5016

Catalogue record

Date deposited: 15 Sep 2017 16:30
Last modified: 14 Mar 2019 01:34

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