2017
DOI: 10.1177/1077546317724602
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Nonlinear dynamic properties of disk-bolt rotor with interfacial cutting faults on assembly surfaces

Abstract: Interfacial cutting faults on assembly surfaces are considered in a three-dimensional (3D) disk-bolt rotor system. The traditional finite element method is used to establish the 3D model of faulted disk-bolt rotor. A contact algorithm is applied to calculate the static features of this combined rotor. It is revealed that interfacial cutting faults produce rotor bending which is gradually strengthened as rotational speed increases besides disk’s mass eccentricity. The 3D dynamic equations of a faulted disk-bolt… Show more

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Cited by 4 publications
(3 citation statements)
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“…In an experimental investigation, Hong [23] subjected a bolt-jointed rotor to repeated bending, concluding that such joint deformations can degrade the rotor's dynamic response. Liu [24] also pinpointed the detrimental effects of bolt joint deformations on rotor dynamic response, which originate from interfacial cutting faults. Neither of the two investigations adequately addressed the root causes of these abnormal experimental observations.…”
Section: Introductionmentioning
confidence: 99%
“…In an experimental investigation, Hong [23] subjected a bolt-jointed rotor to repeated bending, concluding that such joint deformations can degrade the rotor's dynamic response. Liu [24] also pinpointed the detrimental effects of bolt joint deformations on rotor dynamic response, which originate from interfacial cutting faults. Neither of the two investigations adequately addressed the root causes of these abnormal experimental observations.…”
Section: Introductionmentioning
confidence: 99%
“…Hong et al [24] observed a deformation in a rotor's bolt joint after cumulative operating cycles, resulting in an increase in the rotor's unbalance and vibration. Liu et al [25,26] investigated cases involving interface defects and parallelism errors, revealing that a rotor's CM offset exhibits variation with the operational speed, leading to increased rotational inertia excitation and vibration. In engine experiments, engineers have also discovered that as the high-pressure rotor speed increases from 80% to 100% of the maximum operational speed, the turbine disk's slant caused by centrifugal force and thermal deformation at the joint leads to continuous growth in rotor vibration [27].…”
Section: Introductionmentioning
confidence: 99%
“…Liu et al 10 adopted a stiffness matrix and an add-on moment vector to describe the circumferentially distributed rods, and then the local stability of the rod-fastening rotor system is investigated through the shooting method and the Floquet theory. Moreover, Liu et al 11 built a three-dimensional disk-bolt rotor system with interfacial cutting faults on the mating surface, and the static-dynamic coupling characteristics for such rotor system was conducted. Li et al 12 proposed a data-driven modeling method for rotor system, which provide a novel modeling basis for the analysis and design of bolted joint rotor system.…”
Section: Introductionmentioning
confidence: 99%