In order to ensure the safe and effective operation of VLCC airfoil sailing device,the risk analysis of sailing sys-tem based on FMEA and FTA method was carried out.Taking the design workflow as the main line,the potential failure modes,causes and consequences of each working condition in terms of structure,electrical,hydraulic,etc.were judged respectively.The occurrence,severity and detection of each failure mode were evaluated item by item.The risk degree of the failure mode was determined based on the risk priority number RPN,and safety prevention and control measures for high-risk items were decided.Based on the fault tree method,taking"Unable to lower sail urgently"as the top event,the fault causes were analyzed layer by layer,so as to determine the logical relationship of different events,build a fault tree,and propose a certain prevention and con-trol measures for each basic event.
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