2025

Measurement

Journal year: 2025 | Journal volume: vol. 253, part A

scientific article

english

EN Vibratory stress relief (VSR) is a method usually applied to welded structures to minimize residual stresses introduced during welding. This study investigates the application of VSR to a welded steel frame. Experimental modal analysis has been used to evaluate VSR effects on the change of frame’s modal parameters. A novel spectral postprocessing method, amplitude-frequency correction (AFC), is presented as an innovative tool for improving the evaluation of stress relief. Additionally, the Global Energy Factor (GEF), a newly defined measure, is proposed and validated as a convenient measure for evaluating the effectiveness of the VSR process. The study further incorporates short-time Rice frequency analysis (STRFA) of recorded signals, identifying specific measures and characteristics of Rf (τ) as well as the global backbone curve that are useful for stress relief evaluation. This approach represents novel applications in the context of VSR. Results indicate that while the shapes of the vibration modes remain unchanged, significant quantitative increases in transmittance values were observed after VSR. Furthermore, the study concludes that monitoring stress relief through experimental modal analysis in industrial settings is suboptimal. Instead, a promising alternative involves comparing local maxima of the frame’s transmittance function, provided corrections in amplitude terms are applied. This research advances techniques for evaluating VSR and highlights the potential of these novel approaches for industrial applications.

01.04.2025

117454-1 - 117454-16

10.1016/j.measurement.2025.117454

https://www.sciencedirect.com/science/article/pii/S0263224125008139?via%3Dihub

Article Number: 117454

200

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