Analysis of dynamical behaviour of a rotor with deflection limiters

Dynamic characteristics analysis of a rotor–stator system under different rubbing forms

“…In recent years, the rotor-stator rubbing simulated by the contact theory has become widely researched [2,5,9,[31][32][33][34][35]. Based on the above analysis, we found that some researchers adopted non-annular stator [6] (passive mechanical deflection limiting device) or four pin connections [2,3] to prevent vital rotor or stator parts from coming into contact or make possible full annular rubbing transmit local fixed-point rubbing to protect the bearing. At present, there are few investigations about the suppression or control of rotor vibration by changing stator structures, which may change the rubbing forms.…”

“…Based on finite element (FE) theory with unilateral contact and friction conditions, Behzad et al [5] developed an algorithm to investigate of the rotor-to-stator rubbing vibration and carried out a case study of the point rubbing between the rotor and an elastic rod by using this algorithm. Isaksson and Frid [6] studied the dynamical behavior of a rotor rubbing with a non-annular stator and analyzed the influences of different stop configurations on the system vibration responses., Zapomel et al [7] simulated the impacts between the rotor and its housing based on the application of Newton's theory and on the direct calculation of the contact force and investigated the behaviour of rotor systems when the impact occurs.…”

“…Under this condition, the rubbing force can change the motion direction of the rotor. Aiming at the point rubbing, lots of studies [1][2][3][4][5][6] have been carried out. Han et al [1] analyzed periodic motions of a rotor system with two disks where the rub-impacts occur at fixed limiter for a test rig with dual disks.…”

“…Sawicki et al [28] presented an analytical study of the dynamics and stability of rotors subjected to rubbing, taking account of associated thermal effects. Considering the rub-induced force impact and heat impact together, Tian and Yang [29] The mechanical model of the rotor-stator rubbing mostly adopts the piecewise-smooth model and the classical coulomb friction model [1,3,4,6,12,13,15,22,24]. In recent years, the rotor-stator rubbing simulated by the contact theory has become widely researched [2,5,9,[31][32][33][34][35].…”