Optimal design of the hard-coating blisk using nonlinear dynamic analysis and multi-objective genetic algorithm

Gao, Feng; Sun, Wei; Gao, Junnan

doi:10.1016/j.compstruct.2018.10.031

Cited by 14 publications

(5 citation statements)

References 21 publications

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“…The natural frequency increases sharply with the increase of the mode order. It was 474.32 Hz in mode (0,4), but 3106.7 Hz in mode (2,4). In addition, with the increase of the number of nodal diameters, the frequency increases rapidly, compared with nodal circles.…”

Section: Frequency Response Characteristicmentioning

confidence: 89%

Investigation of composite coating induces noise reduction for circular saw blade

Kang

Sun

Zhang

2022

Preprint

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Sawing is the most common process applied in the primary and secondary machining sectors. Unfortunately, circular saw blades (CSBs), as the main tool for sawing, will generate excessive noise in the idling and processing, affecting the user's health and the workpiece surface quality. Hitherto, numerous studies have modified the body structures of CSBs for noise reduction. Its challenge is to reduce the CSB’s stiffness and bearing capacity. Here, a novel composite coating circular saw blade (CCSB) was proposed indirectly improving material damping properties. Subsequently, the frequency response characteristics and harmonic acoustics of CSBs were analyzed by the finite element (FE) simulation. Results suggested that the CCSB can present a notable noise reduction ability. It was found that the peak value of the radiation noise for CSBs is mainly concentrated around the sawtooth passing frequency (SPF). By the analysis of the vertical field, the CCSB disorganizes the original sound pressure level (SPL) field due to the dissipation of shear energy, improving the original SPL distribution. The proposed analysis method of the CCSB can provide theoretical guidance for design, optimize low-noise CSBs and improve the processing environment in the future.

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Section: Frequency Response Characteristicmentioning

confidence: 89%

Investigation of composite coating induces noise reduction for circular saw blade

Kang

Sun

Zhang

2022

Preprint

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“… 16 – 19 Furthermore, many studies have been conducted on the nonlinear vibration analysis of composite hard-coating structures (e.g. beam, 20 plate, 21 – 23 cylindrical shell, 24 – 28 blisk 29 – 34 and blade 35 ) considering the strain dependence of coating material. Based on the parameter identification results of hard coating, 36 , 37 the high-order polynomial method was generally used to characterize the nonlinear characteristics of its storage modulus and loss factor with respect to the equivalent strain.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation for the domain decomposition method in nonlinear vibration of the composite hard-coating cylindrical shell

et al. 2023

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Introduction The applications of the modified domain decomposition method in nonlinear vibration analysis of the composite hard-coating cylindrical shells are still at a relatively superficial level, owing to the fact that its performance under different decomposition parameters has not been thoroughly investigated for achieving sufficient precision. Methods A parametric domain decomposition method is developed to facilitate self-performance evaluation in nonlinear vibration analysis of the shell. Correspondingly, in order to avoid a mass of redundant computation of the segment stiffness and material damping matrices during iterations, a specialized preprocessing scheme is designed by pre-establishing the parametric analytical expressions and matrix databases. Results The resonant response is sensitive to the circumferential segment number, but weakly affected by the axial segment number. The optimum circumferential segment number in the present study is suggested to be Nθ = 70, which can achieve good calculation accuracy and efficiency. Highly consistency is shown for the distributions of axial equivalent strain under different axial segment numbers. Smaller circumferential segment numbers would result in larger equivalent strain and bad solution accuracy. Conclusions The sufficient solution accuracy of nonlinear vibration of the composite hard-coating cylindrical shell can't be achieved by increasing the axial segment number with constant segment width, but only by enough circumferential segment number, which is fundamentally determined by its equivalent strain distributions and gradients, and is with close relation to the axial and circumferential wave numbers of the shell.

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“…The application of hard coatings in the existing literature mostly focuses on simplifying coated discs [5][6][7][8][9][10][11][12][13][14][15], straight blades [16][17][18][19][20][21], plates [22][23][24][25][26], thin shells [27][28][29][30], and disk drums [31]. Yan et al [5] proposed using virtual layers to simulate changes in coating thickness and analyzed the impact of coating thickness on the natural frequency and forced response of actual disks.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al [8] used the Rayleigh-Ritz method to calculate the dynamic characteristics of the rotating blisk with NiCrAlY coating on the blades. Considering the effect of coating thickness on the damping effects of the blisk, Gao et al [9] used NiCoCrAlY + YSZ as an HC material applied to the blade. They used the energy-based finite element method and Newton Raphson method to conduct nonlinear dynamic modeling and forced vibration analysis of the HC disk.…”

Section: Introductionmentioning

confidence: 99%

Vibration Analysis and Damping Effect of Blade-Hard Coating Composite Structure Based on Base Excitation

et al. 2023

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Hard coatings are widely employed on blades to enhance impact resistance and mitigate fatigue failure caused by vibration. While previous studies have focused on the dynamic characteristics of beams and plates, research on real blades remains limited. Specifically, there is a lack of investigation into the dynamic characteristics of hard-coated blades under base excitation. In this paper, the finite element model (FEM) of blade-hard coating (BHC) composite structure is established based on finite element methods in which the hard coating (HC) material and the substrate are considered as the isotropic material. Harmonic response analysis is conducted to calculate the resonance amplitude of the composite under base excitation. Numerical simulations and experimental tests are performed to examine the effects of various HC parameters, including energy storage modulus, loss factors, coating thickness, and coating positions, on the dynamic characteristics and vibration reduction of the hard-coated blade composite structures. The results indicate that the difference in natural frequency and modal loss factor of blades increases with higher storage modulus and HC thickness. Moreover, the vibration response of the BHC decreases with higher storage modulus, loss factor, and coating thickness of the HC material. Blades with a complete coating exhibit superior damping effects compared to other coating distributions. These findings are significant for establishing accurate dynamic models of HC composite structures, assessing the effectiveness of HC vibration suppression, and guiding the selection and preparation of HC materials.

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Optimal design of the hard-coating blisk using nonlinear dynamic analysis and multi-objective genetic algorithm

Cited by 14 publications

References 21 publications

Investigation of composite coating induces noise reduction for circular saw blade

Investigation of composite coating induces noise reduction for circular saw blade

Performance evaluation for the domain decomposition method in nonlinear vibration of the composite hard-coating cylindrical shell

Vibration Analysis and Damping Effect of Blade-Hard Coating Composite Structure Based on Base Excitation

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