Interaction of bridged cracks in a circular disk with mixed boundary conditions

Мирсалимов, В. М.; Kalantarly, Nailya

doi:10.5755/j01.mech.21.5.9518

Cited by 3 publications

(1 citation statement)

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“…e natural frequency is one of the typical vibration characteristics, which can reflect the performance of disk structure to a certain extent. In the researched works of radial cracked disk, Mirsalimov and Kalantarly [17] built up a disk model with a bridged crack and obtained closed algebraic system of equations and limit condition of the crack growth through numerical calculation. Meanwhile, on the research of circumferential cracked disk, Pramod et al [18] investigated the natural frequencies of annular plates with circumferential cracks by finite element method.…”

Section: Introductionmentioning

confidence: 99%

A Study on Mode Shape and Natural Frequency of Rotating Flexible Cracked Annular Thin Disk

Zhao

Zhang

Jiang

2021

Shock and Vibration

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As an important rotating component, the flexible annular thin disk is widely used in mechanical engineering. Cracks may occur in some weak disk parts, which will greatly shorten the equipment service life and even cause equipment failure. Due to the centrosymmetric structure of the flexible annular disk, two typical cracks are studied in this paper; one is radial crack parallel to diameter, including radial closed crack (RC-crack) and radial opening crack (RO-crack); the other one is vertical crack perpendicular to diameter, including circumferential crack (CF-crack) and tangential crack (TG-crack). The effect of crack parameters, such as crack length, direction, and position, on disk vibration characteristics are studied through theoretical simulation and experimental verification. The research shows that the effect of cracks on vibration characteristic gets more obvious with cracks extending in most cases, RO-crack decreases the natural frequency obviously, and vertical cracks would affect mode shapes. In addition, the bigger the nodal diameter is, the more obvious the effect gets. Meanwhile, the most obvious effect appears in the mode of a nodal diameter locating on the crack. The research possesses some guiding significance in industrial production; by comparing with the vibration characteristics of the flawless disk, the integrity of the rotating flexible disk can be judged to prevent possible equipment damage.

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Section: Introductionmentioning

confidence: 99%