Numerical simulation of ACVs&rsquo; ice-breaking based on Rankine source method

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (23) : 27-31.

Numerical simulation of ACVs’ ice-breaking based on Rankine source method

LI Yu-chen, LIU Ju-bin, DING Zhi-yong, ZHANG Zhi-hong

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Abstract

Based on the viscoelastic thin plate assumption and the potential flow theory, a unified theoretical dynamic model was established to study ice layer-water layer vibration problems due to ACV sailing on water surface, ice surface or broken ice surface. The numerical method combing Rankine source method and the finite difference method (FDM) was proposed, the prediction method for ice layer-water layer displacement responses, stress distribution and ice-breaking effect was established using the simulation program written with C language and Matlab. Aiming at characteristics of ice layer in Yellow River water field, its stress distribution and ice-breaking effect were simulated numerically when ACVs sailing at subcritical speed, critical one and supercritical one. These simulated results showed that the established theoretical model and simulation method can not only reflect ice layer displacement deformation and its internal stress distribution characteristics, but also capture the critical speed of ACVs’ ice-breaking; the ice layer’s vibration features calculated agree well with those in the existing literature.

Key words

air cushion vehicle (ACV) / ice-breaking / Rankine source method / FDM

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LI Yu-chen, LIU Ju-bin, DING Zhi-yong, ZHANG Zhi-hong. Numerical simulation of ACVs’ ice-breaking based on Rankine source method[J]. Journal of Vibration and Shock, 2017, 36(23): 27-31

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