Fault analysis and impact weight calculation of marine diesel engine unable to start based on fault tree and analytic hierarchy process

In response to the malfunction of "marine diesel engine unable to start", the possible causes of the malfunction were deduced and a fault tree model was established. On this basis, the fault tree model was transformed into a hierarchical analysis model, and the target layer, criterion layer, and solution layer were constructed. Through expert consultation and data collection, a judgment matrix for each layer was constructed, and the effectiveness of the judgment matrix was verified. The impact weights of each base event on the top event were determined, and targeted suggestions were proposed for the management of marine diesel engine systems.