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Numerical modeling and experimental analysis on coupled torsional-longitudinal vibrations of a ship's propeller shaft

Numerical modeling and experimental analysis on coupled torsional-longitudinal vibrations of a ship's propeller shaft
Numerical modeling and experimental analysis on coupled torsional-longitudinal vibrations of a ship's propeller shaft
A simplified lumped-mass model was established using ordinary differential equations, focusing on the coupled torsional-longitudinal vibrations of a ship's propeller shaft. The numerical simulation based on the presented algorithm was then developed and the dynamic behavior was investigated. A theoretical solution setup with simple model was solved to demonstrate the accuracy of the proposed lumped-mass model. Based on this model, the coupled natural frequencies and the maximum acceleration of each direction were determined. Experimental tests were conducted to validate the applicability of the numerical model, over a range of rotational speeds and loading conditions. It is found that the natural frequencies are unaffected while the maximum acceleration are increased with the rotational speed as well as the loading. Natural frequencies representing other directions are induced by the coupling effect, and enhance the dynamical response. The ultimate response in the direction without excitation is enlarged because of the coupling effect. An appropriate coupling stiffness coefficient value has been proposed based on the discussion on modeling and experimental results.
0029-8018
272-282
Huang, Q.
e84c225b-b5ad-40cb-85f8-abe8fb3dcfef
Yan, X.
dedf4430-3d14-43c2-b52c-c8f30e64cba4
Wang, Y.
2729f2f1-36d7-4daa-8589-b61fcc99a313
Zhang, C.
eba93fe3-a612-43da-86ee-d7b661895600
Wang, Z.
d62d7c66-3817-4528-aeb9-ab18f1319707
Huang, Q.
e84c225b-b5ad-40cb-85f8-abe8fb3dcfef
Yan, X.
dedf4430-3d14-43c2-b52c-c8f30e64cba4
Wang, Y.
2729f2f1-36d7-4daa-8589-b61fcc99a313
Zhang, C.
eba93fe3-a612-43da-86ee-d7b661895600
Wang, Z.
d62d7c66-3817-4528-aeb9-ab18f1319707

Huang, Q., Yan, X., Wang, Y., Zhang, C. and Wang, Z. (2017) Numerical modeling and experimental analysis on coupled torsional-longitudinal vibrations of a ship's propeller shaft. Ocean Engineering, 136, 272-282. (doi:10.1016/j.oceaneng.2017.03.017).

Record type: Article

Abstract

A simplified lumped-mass model was established using ordinary differential equations, focusing on the coupled torsional-longitudinal vibrations of a ship's propeller shaft. The numerical simulation based on the presented algorithm was then developed and the dynamic behavior was investigated. A theoretical solution setup with simple model was solved to demonstrate the accuracy of the proposed lumped-mass model. Based on this model, the coupled natural frequencies and the maximum acceleration of each direction were determined. Experimental tests were conducted to validate the applicability of the numerical model, over a range of rotational speeds and loading conditions. It is found that the natural frequencies are unaffected while the maximum acceleration are increased with the rotational speed as well as the loading. Natural frequencies representing other directions are induced by the coupling effect, and enhance the dynamical response. The ultimate response in the direction without excitation is enlarged because of the coupling effect. An appropriate coupling stiffness coefficient value has been proposed based on the discussion on modeling and experimental results.

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Submitted date: 26 July 2016
Accepted/In Press date: 12 March 2017
e-pub ahead of print date: 21 March 2017
Published date: 15 May 2017
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 411896
URI: http://eprints.soton.ac.uk/id/eprint/411896
ISSN: 0029-8018
PURE UUID: ad75b49b-ffb9-4594-8db7-ae44a6991731
ORCID for Y. Wang: ORCID iD orcid.org/0000-0001-5619-7795

Catalogue record

Date deposited: 28 Jun 2017 16:32
Last modified: 16 Mar 2024 04:16

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Contributors

Author: Q. Huang
Author: X. Yan
Author: Y. Wang ORCID iD
Author: C. Zhang
Author: Z. Wang

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