In response to the demand for optimizing maintenance regimes for multiple units,this paper proposed a method for evaluating the service life of hanger bolts in multiple units based on measured loads and fatigue simulations.A long-term,in-service tracking test was conducted on an air conditioning unit,as representative of typical cabin device,employing rainflow counting techniques to derive load spectra under varying mileage,subsequently calculating daily frequency counts for each acceleration level experienced during operation.An Ansys-nCode coupled cyclic life simulation model was established to determine fatigue life for the different acceleration levels.Leveraging the Miner linear cumulative damage theory,the service life of the bolts was assessed considering the daily frequency counts and corresponding fatigue lives at each acceleration level.The proposed model and approach provide guidance for the optimization of maintenance regimes for hanger bolts in multiple units.
service lifecoupled simulation modellinear cumulative damagehanger bolts
万方数据
维普
