Task-Oriented Structural Health Monitoring of Dynamically Loaded Components by Means of SLDV-Based Full-Field Mobilities and Fatigue Spectral Methods
Expected lives of mechanical parts and structures depend upon the environmental conditions, their dynamic behaviours and the task-oriented spectra of different loadings. This paper exploits contactless full-field <i>mobilities</i>, estimated by Scanner Laser Doppler Vibrometry (SLDV), in...
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MDPI AG
2025-04-01
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| author | Alessandro Zanarini |
| author_facet | Alessandro Zanarini |
| author_sort | Alessandro Zanarini |
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| description | Expected lives of mechanical parts and structures depend upon the environmental conditions, their dynamic behaviours and the task-oriented spectra of different loadings. This paper exploits contactless full-field <i>mobilities</i>, estimated by Scanner Laser Doppler Vibrometry (SLDV), in the real manufacturing, assembling and loading conditions of the thin plate tested, whose structural dynamics can be described in broad frequency bands, with no distorting inertia of sensors and no numerical models. The paper derives the <i>mobilities</i> into full-field strain Frequency Response Functions (FRFs), which map, by selecting the proper <i>complex-valued</i> broad frequency band excitation spectrum, the surface strains. From the latter, by means of the constitutive model, dynamic stress distributions are computed, to be exploited in fatigue spectral methods to map the expected life of the component, according to the selected tasks’ spectra and the excitation locations. The results of this experiment-based approach are thoroughly commented in sight of non-destructive-testing, damage and failure prognosis, Structural Health Monitoring, manufacturing and maintenance actions. |
| format | Article |
| id | doaj-art-a33663edbc6e4508a1f3b450a022d486 |
| institution | OA Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-a33663edbc6e4508a1f3b450a022d4862025-08-20T01:49:20ZengMDPI AGApplied Sciences2076-34172025-04-01159499710.3390/app15094997Task-Oriented Structural Health Monitoring of Dynamically Loaded Components by Means of SLDV-Based Full-Field Mobilities and Fatigue Spectral MethodsAlessandro Zanarini0Dynamics & Vibrations of Machines, DIN—Department of Industrial Engineering, University of Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyExpected lives of mechanical parts and structures depend upon the environmental conditions, their dynamic behaviours and the task-oriented spectra of different loadings. This paper exploits contactless full-field <i>mobilities</i>, estimated by Scanner Laser Doppler Vibrometry (SLDV), in the real manufacturing, assembling and loading conditions of the thin plate tested, whose structural dynamics can be described in broad frequency bands, with no distorting inertia of sensors and no numerical models. The paper derives the <i>mobilities</i> into full-field strain Frequency Response Functions (FRFs), which map, by selecting the proper <i>complex-valued</i> broad frequency band excitation spectrum, the surface strains. From the latter, by means of the constitutive model, dynamic stress distributions are computed, to be exploited in fatigue spectral methods to map the expected life of the component, according to the selected tasks’ spectra and the excitation locations. The results of this experiment-based approach are thoroughly commented in sight of non-destructive-testing, damage and failure prognosis, Structural Health Monitoring, manufacturing and maintenance actions.https://www.mdpi.com/2076-3417/15/9/4997structural health monitoringfailure prognosisSLDV-based full-field FRFsexperiment-based receptancesstructural dynamicsfatigue spectral methods |
| spellingShingle | Alessandro Zanarini Task-Oriented Structural Health Monitoring of Dynamically Loaded Components by Means of SLDV-Based Full-Field Mobilities and Fatigue Spectral Methods Applied Sciences structural health monitoring failure prognosis SLDV-based full-field FRFs experiment-based receptances structural dynamics fatigue spectral methods |
| title | Task-Oriented Structural Health Monitoring of Dynamically Loaded Components by Means of SLDV-Based Full-Field Mobilities and Fatigue Spectral Methods |
| title_full | Task-Oriented Structural Health Monitoring of Dynamically Loaded Components by Means of SLDV-Based Full-Field Mobilities and Fatigue Spectral Methods |
| title_fullStr | Task-Oriented Structural Health Monitoring of Dynamically Loaded Components by Means of SLDV-Based Full-Field Mobilities and Fatigue Spectral Methods |
| title_full_unstemmed | Task-Oriented Structural Health Monitoring of Dynamically Loaded Components by Means of SLDV-Based Full-Field Mobilities and Fatigue Spectral Methods |
| title_short | Task-Oriented Structural Health Monitoring of Dynamically Loaded Components by Means of SLDV-Based Full-Field Mobilities and Fatigue Spectral Methods |
| title_sort | task oriented structural health monitoring of dynamically loaded components by means of sldv based full field mobilities and fatigue spectral methods |
| topic | structural health monitoring failure prognosis SLDV-based full-field FRFs experiment-based receptances structural dynamics fatigue spectral methods |
| url | https://www.mdpi.com/2076-3417/15/9/4997 |
| work_keys_str_mv | AT alessandrozanarini taskorientedstructuralhealthmonitoringofdynamicallyloadedcomponentsbymeansofsldvbasedfullfieldmobilitiesandfatiguespectralmethods |