Finite element analysis for a functionally graded rotating shaft with multiple breathing cracks

Gayen, Debabrata; Chakraborty, Debabrata; Tiwari, Rajiv

doi:10.1016/j.ijmecsci.2017.10.027

Cited by 34 publications

(13 citation statements)

References 36 publications

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“…Many rotating mechanisms (wheels, gears, shafts, rotors...) are used during the transport process. The rotating parts with gyroscopic effect of the transportation are studied in [7], [10], [11], [13], [19], [20]. We have to model their properties as a gyroscope.…”

Section: Resultsmentioning

confidence: 99%

“…The mathematical model based on the physical discretization and used for solving the problem of finding critical speed of rotations is made in [11]. The finite element analysis for a functionally graded rotating shaft with multiple breathing cracks is presented in [7]. The set of steady-state conditions for the movement of the tractorlorry-trailer combination model is determined on the basis of the developed mathematical model; it provides the necessary mobility for the passage of the circular overall traffic lane [27].…”

Section: Resultsmentioning

confidence: 99%

“…Larmor precession in atomism) and astronomy (lunisolar precession of Earth), in technology (e.g. gyroscopic effect in transportation [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. ), in military (stabilization of missiles and bullets) and also in sport (flight disk), in energetics (kinetic energy accumulation by turbines, mechanical batteries).…”

Section: Introductionmentioning

confidence: 99%

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Applications of Gyroscopic Effect in Transportation

Náhlík

Smetanová

2018

Naše more

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This article describes gyroscopes and their effects in various fields of everyday life. Gyroscopic effect is ability (tendency) of the rotating body to maintain a steady direction of its axis of rotation. The gyroscopes are rotating with respect to the axis of symmetry at high speed. Gyroscopic effect is related to all rotating mechanisms (wheels, gears, shafts, rotors, bicycles, motorcycles, children's toys...). In some cases, we want to enhance the gyroscopic effect (for stabilization, energy accumulation). Stabilization effect is mainly used for two-wheeled vehicles. It can be also used on ships and boats, where big wheel is rotating and preventing the boat to overturn. Gyroscopic effects can help with energy accumulation. The bigger rotating speed is achieved the bigger amount of energy is stored. When the gyroscope is well designed the efficiency can be much higher than in the batteries. In other cases we want to suppress or compensate it (in case of the direction change of the rotating device). This is mainly about the planes. When the pilot of the plane needs to change the heading then during the left turn the plane will go up and during the right turn it goes down. The use of gyroscopes is important in various modes of transportation. We describe different usage of gyroscopes in transport and logistics, especially gyrocompass (ships and planes-advantages: no influence by ferromagnetic materials, heading to the true North, disadvantages: errors caused by rapid changes in course, speed and latitude); attitude and heading indicators (plane); pendulous integrating gyroscopic accelerometer (rocketry); gyrostat-control moment gyroscope (space-stations, satellites and probes); MEMS gyroscope (automotive, entertainment, robots, etc.).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Applications of Gyroscopic Effect in Transportation

Náhlík

Smetanová

2018

Naše more

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“…Genta [14] introduced the dynamics theory of multidegree-of-freedom rotating systems and continuous systems. Gayen et al [15][16][17] presented the finite element (FE) formulation of a functionally graded (FG) shaft having multiple cracks to study the transverse vibration of such shafts in a rotor-bearing system. Timoshenko beam was used where effects of translational and rotary inertia, transverse shear deformations, and gyroscopic moments were considered.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Vibration of Ship Propulsion Shaft under Hull Deformation Excitations on Bearings

Zhang

Xie

Huang

et al. 2019

Shock and Vibration

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With the development of ship enlargement, the problems of coupling vibration between hull and propulsion system and vibration transmission via bearings are more and more prominent. Based on the theory of shaft vibration and the experimental system for dynamic characteristics of the shaft, an experiment plan about propulsion shaft vibration under dynamic excitations is designed in this paper. e performance of propulsion shaft vibration under hull deformation excitations applied on intermediate and stern bearings is studied. Hydraulic excitations in horizontal and vertical directions on the intermediate bearing and stern bearing of the experimental model of propulsion shaft are considered in this paper to simulate hull deformation on bearings of the ship. Vibration characteristics of the shaft under different excitations are gained and coupling effects are discussed. Moreover, the influences of amplitude and direction of excitations on bearings and the shaft rotation speed on the vibration of propulsion are studied. e results show that aiming at improving the safety and reliability of navigation, the hull deformation, especially the horizontal hull deformation excitation on the intermediate bearing, is not neglectable and should be considered during primary design. Also, rotation speed and resonant frequency are needed to be well designed with the frequencies of hull deformation excitations.

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“…As is well-known, accurate and reliable mechanical behavior analysis of FGM structures with initial damage is vital for the early condition assessment and damage prognosis in order to guarantee the safe performance and prevent the possible disastrous failure of FGM structures [20,21].…”

Section: Introductionmentioning

confidence: 99%

Statistical Identification of Parameters for Damaged FGM Structures with Material Uncertainties in Thermal Environment

Guo

2018

Complexity

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Considering that the statistic numerical characteristics are often required in the probability-based damage identification and safety assessment of functionally graded material (FGM) structures, an stochastic model updating-based inverse computational method to identify the second-order statistics (means and variances) of material properties as well as distribution of constituents for damaged FGM structures with material uncertainties is presented by using measurable modal parameters of structures. The region truncation-based optimization method is employed to simplify the computational process in stochastic model updating. In order to implement the forward propagation of uncertainties required in the stochastic model updating and avoid large error resulting in the nonconvergence of the iteration process, an algorithm is proposed to compute the covariance between the modal parameters and the identified parameters for damaged FGM structures. The proposed method is illustrated by a numerically simulated damaged FGM beam with continuous spatial variation of material properties and verified by comparing with the Monte-Carlo simulation (MCS) method. The influences of the levels and sources of measured data uncertainties as well as the boundary conditions on the identification results are investigated. The numerical simulation results show the efficiency and effectiveness of the presented method for the identification of material parameter variability by using the measurable modal parameters of damaged FGM structures.Hindawi Complexity Volume 2018, Article ID 9034865, 21 pages https://doi.

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Finite element analysis for a functionally graded rotating shaft with multiple breathing cracks

Cited by 34 publications

References 36 publications

Applications of Gyroscopic Effect in Transportation

Applications of Gyroscopic Effect in Transportation

Experimental Research on the Vibration of Ship Propulsion Shaft under Hull Deformation Excitations on Bearings

Statistical Identification of Parameters for Damaged FGM Structures with Material Uncertainties in Thermal Environment

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