BLADE SHAPE DESIGN METHOD AND BLADE SHAPE DESIGN SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a blade shape design method of a rotary machine blade for designing a proper rotary machine blade.;SOLUTION: The blade shape design method includes a selection step for selecting a blade shape of a rotary machine blade, an oscillation strength designing step for respectively calculating oscillation strength about the selected blade shape and a plurality of blade shapes obtained by changing the blade shape partially, selecting one blade shape among them and determining whether the oscillation strength of the selected blade shape is included in an allowable range, a static strength designing step for calculating static stress about the blade shape and the plurality of blade shapes obtained by changing the blade shape partially in which oscillation strength is within the allowable range, selecting one blade shape among them and determining whether the static stress of the selected blade shape is included in the allowable range, and a condition resetting step for changing an input condition and progressing the selection step when the blade shape does not satisfy the allowable range, wherein the static strength designing step performs nonlinear analysis.;COPYRIGHT: (C)2010,JPO&INPIT