Building method and application of improved models for design quality of marine power plant based on QFD and FMEA

  Objectives  In order to improve the safety and reliability indicators performance in the design of the marine power plant, the Failure Mode and Effect Analysis(FMEA)is used to predict and propose the control measures.

  Methods  The quality control method is introduced with Quality Function Deployment(QFD)to analyze the risk assessment objects, clarify the composition and meaning of the risk priority numbers, and improve the calculation formula, thereby improving the accuracy and comprehensiveness of risk assessment. For the multi-attribute decision-making under expert evaluation, a dependent 2-tuple weighted geometric averaging(DT-WGA)operator is used for evaluation.

  Results  The effectiveness of the proposed method is verified by the shafting design of the ship.

  Conclusions  The improved models based on QFD and FMEA can provide theoretical and methodological support for improving the performance of design indicators, such as reliability and safety of the power plant, and provide a certain reference for the improvement of design level of marine power plant.