Failure Analysis of Asphalt Foaming Device Based on FEMA and FTA

Abstract

The FMEA method is a bottom-up method, and the FTA method is a top-down method. This paper proposes to combine the two methods, using the complementarity of the FMEA method and the FTA method, and targeting the innovative product- The six subsystems of the bubble device perform fault analysis, grasp the key parts of the fault, and propose corresponding solutions based on a comprehensive analysis of the fault. The analysis results show that the failures of the asphalt foaming device mainly occur before and during the asphalt foaming. The FMEA table reflects that the RPN value of the two failure factors of the blockage of the asphalt pipeline and the blockage of the water nozzle is the largest. The three failure factors with the highest severity level (SER) are heater damage, motor damage and PLC control device failure.