A convergence study on mixed mode function – boundary element method for aircraft-VLFS-water interaction system subject to aircraft landing impacts


Jin, Jin and Xing, JingTang (2009) A convergence study on mixed mode function – boundary element method for aircraft-VLFS-water interaction system subject to aircraft landing impacts. In, Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering. 28th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2009) New York, USA, American Society of Mechanical Engineers, 1-11.

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Description/Abstract

A mixed mode function-boundary element method was developed by the authors to analyze the dynamic behaviour of an integrated aircraft – VLFS – water interaction system exited by aircraft landing impacts. In the mathematical model, the aircraft and VLFS are considered as two elastic structures. The landing gears of the aircraft are modeled by four support units, each of which consists of a linear spring and damper. The water is assumed to be incompressible, inviscid and satisfying a linear free surface wave condition and an undisturbed condition at infinity. The motions of the aircraft and VLFS are described by their respective natural modes. The fluid domain is modelled using a boundary element approach. The coupled fluid – structure equation is solved in the time domain with Newmark approximations. In this paper, the numerical stability of the developed method is investigated. To realize this aim, convergence study is performed in determining the size of retained fluid surface, the number of retained modes of VLFS and the time step used in the time integration scheme.

Item Type: Book Section
Additional Information: Paper number OMAE2009-79090
ISBNs: 9780791838440 (hardback)
Related URLs:
Keywords: vlfs, airplane-vlfs-water interaction, transient dynamic analysis, mixed mode function-boundary element method, numerical integration
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Fluid-Structure Interactions
ePrint ID: 66397
Date Deposited: 15 Jul 2009
Last Modified: 27 Mar 2014 18:47
URI: http://eprints.soton.ac.uk/id/eprint/66397

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