ОСНОВНЫЕ ПУТИ ПОВЫШЕНИЯ ТОЧНОСТИ РАСЧЕТНОГО ОПРЕДЕЛЕНИЯ СОБСТВЕННЫХ ЧАСТОТ И ФОРМ КОЛЕБАНИЙ ЛОПАТОК ГТД

The main factors, making the greatest impact on accuracy calculations of natural frequencies and mode shapes of GTE’s compressor blades are defined. The experiment-calculated analysis of influence of a kind of boundary conditions on blades natural frequencies and mode shapes depending on the scale factor and blade-disk joint type is carried out. Blades with blade-disk joints of three types - «two-teeth fir-tree», «dovetail» attachment and ring-type «dovetail» is considered. Statistical processing of results is executed. Practical recommendations at a rational choice of boundary conditions for blades designing with investigated types of blade-disk joints and scale groups are given.