In the preliminary design phase of aero-engine turbine

the turbine flow path was designed. The complex constraining and balanced relations between aerodynamic performance and turbine blade and disc strength were synthetically analyzed to establish turbine multidisciplinary optimization system of flow path design and turbine strength calculation

and to achieve the multidisciplinary design optimization of turbine flow path

with efficiency and structural weight as design targets. The maximum value of radial stress and circumferential stress are respectively decreased by 4.62% and 10.63%

the mean value of radial stress and circumferential stress in dangerous area are also decreased by 42.99% and 3%

and the turbine comprehensive performance in aerodynamic and structural strength are improved by 3.41% after optimization.