Hydrodynamic aspects of the Air Lifted Vessel (ALV) Presenter: Nan Xie Supervisor: Prof. Dracos Vassalos SSRC, NA-ME

1 The Project - EFFISES 5 th Framework Program of EU 13 partners from 9 EU-countries Super high speed marine transportation Objectives: Passenger ship: E40, 70kn Cargo ship: E125,50kn Efficient – less power, 25% Environment friendly – less emission & wash Safe

SSRC’s task Development of methods & tools Wash Wave Stability

2 Prediction of Wash Wave of ALV Features: Over 80% of vessel weight are supported by air-cushion Pressure patch distribution over cushion Linear potential theory New numerical scheme

Results:

3 Stability study Features: Air compressibility in cushion Non-linear equations of motions Time domain simulation Impulse response function & memory effects Case study

Results – Free surface elevation

Results - Impulse response function

Results - Porpoising

4 Outcomes: Project deliverables Paper for ISOPE’04 Paper for PRADS’04

5 Future Works Wash wake assessment of ALV Refinement of mathematic model of stability 6 DOF Stability in manoeuvring motion CFD – dynamic force derivates Design & operational guideline, safety assessment

Acknowledgments