Method and device for analyzing comprehensive performance of variable-speed power turbine

The invention discloses a method and a device for analyzing comprehensive performance of a variable-speed power turbine. The method comprises the following steps of: acquiring each state time, each state oil consumption, total cycle matching efficiency and total oil consumption of an engine; obtaining each state time and each state efficiency of the variable speed power turbine; according to the predicted variable speed power turbine efficiency and the total cycle matching efficiency of the engine, efficiency weighting is carried out on the relation among the total oil consumption of the engine, the oil consumption of each state and the time of each state; according to the relation between the efficiency of each state of the variable-speed power turbine and the fuel consumption of each state of the engine, the total fuel consumption of the engine after efficiency weighting, and the relation between the fuel consumption of each state and the time of each state, a preliminary analysis index is established; and