Dynamic Characteristics Study with Multidegree-of-Freedom Coupling in TBM Cutterhead System Based on Complex Factors

Table 1

Natural frequencies and vibration of the cutterhead system.

Vibration modes	Natural frequencies/Hz
Rigid mode	𝑓1=0
Rotational vibration of pinions and motors	𝑓2−9=57
Translational and overturning coupled vibration of cutterhead and inner ring gear	𝑓10=61, 𝑓11=70, 𝑓12=114, 𝑓13,14=120, 𝑓15=124