Fourier series based reliability analysis of aeroengine turbine blade under linear fuzzy safety state

► A Fourier series method is established to compute fuzzy reliability of aeroengine turbine blade. ► Reliability analysis is carried out under various linear fuzzy safety states. ► Thermal fatigue load on turbine blade root flange is analyzed. ► Static unbalance load on turbine blade edge is analyzed. ► Cycle fatigue load on turbine blade connection is analyzed.