Non-conservative stability of a cracked thick rotating blade

Chen, L.-W.; Chen, J.-L.

doi:10.1016/0045-7949(90)90410-4

Cited by 8 publications

(5 citation statements)

References 13 publications

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“…Abbas [6] and Thomas and Abbas [7] developed a "nite element model which can satisfy all the geometric and natural boundary conditions of a thick non-rotating blade. Chen and Chen [8,9] further studied the vibration and stability of cracked rotating blades by the "nite element model which can satisfy all the geometric and natural boundary conditions. Zorzi and Nelson [10] studied the e!ects of external and internal damping on rotor-bearing systems by the "nite element model.…”

Section: Introductionmentioning

confidence: 99%

Random Vibration of a Rotating Blade With External and Internal Damping by the Finite Element Method

Chen¹,

Chen²

2002

Journal of Sound and Vibration

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Section: Introductionmentioning

confidence: 99%

Random Vibration of a Rotating Blade With External and Internal Damping by the Finite Element Method

Chen¹,

Chen²

2002

Journal of Sound and Vibration

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“…Before having these procedures available, it is necessary to know the behaviour of rotating blades with defects to be able to compare this behaviour with that of intact blades and to determine the parameters that affect this behaviour. In this regard, it should be mentioned that the number of studies on the behaviour of cracked rotating blades is limited (Chen and Chen 1988;Wauer 1991;Banerjee and Pohit 2014;Lee and Lee 2017;Yashar et al 2018;Valverde-Marcos et al 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Another special feature of the dynamic behaviour of rotating beams is that there are directions for their study: "chordwise", in the plane of rotation, and "flapwise", outside the plane of rotation. In both intact and defective beams, the presence of this centrifugal force results in an increase of the natural frequency in both directions like in Lee and Lee (2017), Wauer (1991), Valverde-Marcos et al (2022), Chen and Chen (1988), Yashar et al (2018), Banerjee et al (2014) and Bhat (1986).…”

Section: Introductionmentioning

confidence: 99%

Identification of cracks in low-speed rotating slender cracked beams using frequencies and artificial rabbit algorithm

Muñoz-Abella,

Rubio,

Rubio

2024

Lat. Am. j. solids struct.

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This article aims to identify the presence of cracks in slender rotating beams (Euler Bernoulli) from the dynamic behaviour of cracked beams operating at low rotational speeds. For this purpose, the behavioural model of the cracked rotating beam developed by the authors in previous works is shown. The results of the mathematical model developed (natural frequencies) feed a novel meta-heuristic optimisation algorithm based on the survival tactics of rabbits against their predators: Artificial Rabbit Optimization (ARO). The application of this algorithm to the first two natural frequencies of vibration obtained with the analytical model and contrasted in previous works gives rise to the identification of the characteristic parameters of the crack contained in the beams. The estimation of the parameters: position along the beam and crack depth, show a high similarity with the initial data, which allows validating the application of the optimisation algorithm to the identification of cracks in this type of component as a first approach to a health monitoring method for more complex rotating cantilever beam structures.

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“…Therefore, this study examines the effect of a crack on the dynamic instability of a drill while drilling through a workpiece. During the preceding two decades, a number of studies [15][16][17][18][19] reported that cracks might change the dynamic characteristic behavior of a structural system.…”

Section: Introductionmentioning

confidence: 99%

Instability of a cracked twisted beam with a time-dependent boundary

Huang

2010

Nonlinear Dyn

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The crack effect on the instability of a twisted beam with a time-dependent boundary, a drill in the drilling process, is studied in this work. This work presents the drilling force from the two active parts of a twisted drill subjected to small fluctuations during the drilling process. This small drilling force fluctuation may lead the system into a dynamically unstable condition. In this work, the instability of a drill with drilling force fluctuations is focused to study as the drill has a crack. A moving Winkler-type elastic foundation is used to approximate the drilling process and the multiple scale method is employed to solve for the unstable regions. Numerical analysis indicates that the unstable regions are enlarged and shifted to a lower frequency suddenly as a drill with a crack bites into a workpiece. It is also observed that the crack depth, thrust force and rotation speed drastically change the dynamic instability of the drilling process.

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Non-conservative stability of a cracked thick rotating blade

Cited by 8 publications

References 13 publications

Random Vibration of a Rotating Blade With External and Internal Damping by the Finite Element Method

Random Vibration of a Rotating Blade With External and Internal Damping by the Finite Element Method

Identification of cracks in low-speed rotating slender cracked beams using frequencies and artificial rabbit algorithm

Instability of a cracked twisted beam with a time-dependent boundary

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