Single-sensor-based dynamic response reconstruction of blades under base excitation

Zhou, Kai; Wang, Yanan; Qiao, Baijie; Fu, Shunguo; Luo, Xianqiang; Chen, Xuefeng

doi:10.1016/j.ymssp.2023.110217

Cited by 9 publications

(2 citation statements)

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“…Base excitation is important in the vibration characteristics of testing the structure. Base excitation is widely used since the input energy is stable and excitation is close to the actual stress state of the structure [32][33][34][35]. For example, Araki [32] studied a shaking table as a base excitation to test the response of the structure fixed on the isolator.…”

Section: Introductionmentioning

confidence: 99%

“…Pellicano [33] tested the nonlinear vibration characteristics of the cylinder based on base harmonic excitation. Zhou et al [34] proposed a method for measuring the dynamic response of blades using a single sensor under base excitation and studied the effects of single-frequency and multifrequency excitation, measurement noise, and selection of measurement points on the response results. Česnik et al [35] proposed a new method to obtain the stress frequency response function under base excitation using a modal model of unconstrained structures.…”

Section: Introductionmentioning

confidence: 99%

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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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