Based on kinds of different precise analysis methods on the turbine design

the multiple precision strategy was put forward in order to balance the cost and the precision on turbine MDO.This strategy studied the variable complexity method (VCM) which was improved by the two-point scale function

the new updating technology and three kinds of precise models including the fluid-solid closely couple analysis

the fluid-solid-thermal loosely couple analysis and the approximate equation.The strategy solves the difficulty of disciplinary decoupling and coordination by the collaborative optimization (CO) strategy.Finally

using 9 high precision fluid-solid coupling analysis

the new strategy can finish the turbine MDO with acceptable performance.