# Study on Influence of Multi-Parameter Variation of Bladed Disk System on Vibration Characteristics
## 4 The Influence of Detuning Parameters on Bladed Disk System Is Analyzed
### Design of Bladed Disk System Parameter Variation  
The change of blade mass in the bladed disk system will lead to the change of the inherent characteristics of the bladed disk system, such as blade crack, blade scale formation and blade detachment. Ten different working conditions were set up to discuss the factors influencing the vibration characteristics of the bladed disk system. The design of different working conditions is as follows: the modal results and vibration modes of the bladed disk system and the original disk were compared and analyzed, and the differences in modal frequency, vibration mode and amplitude between the bladed disk system and the disk system were found. The above, middle and lower positions of the groove of a single blade were aggravated, the weight of which remained unchanged, and the variation of modal frequency, vibration mode and amplitude of the bladed disc system was discussed and analyzed. For each angle (60\({}^{\circ}\), 120\({}^{\circ}\), 180\({}^{\circ}\)) of the double blades that is aggravating, we discuss bladed disk system modal frequency, vibration mode and the change of amplitude. Different mass intensification was carried out at the same position of the same blade. One third (6 pieces) of the blades at the adjacent position of the whole disc system were removed to discuss and analyze the variation of modal frequency, vibration mode and amplitude of the disc system. The mode frequency, mode type and amplitude of the low-frequency vibration were still considered, and the first 16 mode vibration frequencies under 10 different conditions were intercepted, as shown in Table 3. The mode frequency of the corresponding bladed disk system under different conditions is shown in Figure 8.  
In Figure 8, Curve 1 represents the modal frequency corresponding to a different order of the disk; Curve 2 represents the modal frequency corresponding to a different order of the bladed disk system; Curve 3 represents the modal frequencies of different orders when the top of a blade keyway of a blade disk system is increased by 1.7 g; Curve 4 represents the modal frequencies of different orders when the middle part of a blade keyway of a bladed disk system is increased by 1.7 g; Curve 5 represents the modal frequencies of different orders when the bottom of a blade keyway on the bladed disc is weighted by 1.7 g; Curve 6 represents the modal frequencies of different orders when a certain double blades are 60\({}^{\circ}\) each other and the top of the blade keyway is weighted by 1.7 g respectively; Curve 7 represents the modal frequencies of different orders when a certain double blades are 120\({}^{\circ}\) each other and the top of the blade keyway is weighted by 1.7 g respectively; Curve 8 represents the modal frequencies of different orders when a certain double blades are 180\({}^{\circ}\) each other and the top of the blade keyway is weighted by 1.7 g respectively; Curve 9 represents the modal frequencies of different orders when the top of a blade keyway on the blade disk is weighted 5.1 g; Curve 10 represents the modal frequency of blade shedding of 6 adjacent blades in different order.