Motion response analysis of mining vessel based on ANSYS/AQWA

Abstract

To analyse the motion response of mining vessel under complex sea conditions and provide theoretical support for the design of heave compensation system, the hydrodynamic analysis software AQWA of three-dimensional potential flow theory was used to analyse the time-frequency response characteristics of mining vessel under the coupling of wind, wave and flow. The response amplitude operator (RAO) of the hull at different wave angles and the six-degree-of-freedom motion response of the hull at different currents were obtained. The results show that the wave angle has an influence on the Rao in the six degrees of freedom, but the frequency corresponding to the Rao peak is relatively close; the time domain analysis results show that the hull roll motion response is larger than the pitch; the maximum response angle of the roll is up to 4°; the effect of sea current velocity on swing, sway, and heave direction is different; the statistical average of wave force in different degrees of freedom is also affected by the wave angle. The simulation results in this paper can provide theoretical guidance for the design of multi-dimensional wave compensation system in mining system. Therefore, when designing wave compensation system, it is necessary to consider the influence of different situations.