Integrated Structure and Vibration Optimization Design of Turbocharger Compressor Blade

The optimization of turbocharger compressor blade was presented,a three dimensional model of compressor blade was established,and the aerodynamic performance and compressor blade surface pressure distribution were obtained through the three-dimensional flow field numerical simulation.With not changing the blade shape to ensure the compressor aerodynamic performance,the integrated optimization of the blade static strength and vibration characteristics was carried out.The roof and root thickness of the four key cross-sections of the blade were used as design variables,the Von Mises stress under the centrifugal force and aerodynamic pressure and the first order dynamic frequency were used as constraints,and the volume of the blade was used as the objective function.In iSIGHT optimization platform,the I-DEAS and ANSYS software were integrated,a integral mixed optimization and adaptive simulated annealing optimization method were applied.Under the conditions of the static strength less than the yield strength and the first order dynamic frequency more than three times of the frequency of work,the volume(mass) of the blade decreased by 14.7%.