发动机风扇盘转速谱编制方法OA

The fan disk is a critical fracture-prone component in aero-engines.To ensure its operational safety and re-liability,it is essential to develop load spectra that accurately reflect operating conditions,which are crucial for fatigue life assessment.This study conducts statistical analysis of single-parameter loading on fan disks based on operational data from two mission types of a specific aero-engine,and develops a median speed spectrum through mission seg-ment analysis methodology.The load spectrum damage was calculated using the SWT(Smith-Watson-Topper)equa-tion and linear cumulative damage theory.Load spectrum similarity analysis was conducted with the DTW(Dynamic Time Warping)method.Based on group tests of TC17 titanium alloy simulated specimens,a damage analysis method based on load spectrum similarity was proposed.The damage of the fleet fan disk rotational speed spectrum was calculated to obtain a set of load spectrum damage samples.Goodness-of-fit tests indicate that the fan disk rota-tional speed spectrum damage follows a lognormal distribution.The damage corresponding to the median rotational speed spectrum closely approximates the median damage of the fleet rotational speed spectrum,validating the ratio-nality of the spectrum development methodology.This provides critical support for accurately assessing the safe ser-vice life of fan disks.