Structural intensity in thin plates and beams under transient and stationary forces using time-resolved, full-field optical slope measurements
Abstract
Structural intensity, or structure-borne intensity or power flow, was introduced in the 1970s and implemented at that time using contact sensors like accelerometers. Point and contactless measurement methods removed added mass and sensor size constraints. Time-resolved and full-field vibration measurement techniques now open new perspectives for the estimation of structural intensity, but these prospects also come with many challenges. In this work, we study the applicability of optical deflectometry measurements to calculate the structural intensity in thin plates or beams under transient and stationary loadings. Since deflectometry directly provides slope fields, a slope formulation of structural intensity is proposed and evaluated. The effect of various parameters like frame rate (sampling frequency) and spatial resolution is studied from a numerical point of view on a simply-supported plate. Experimental results are then presented on a simply-supported plate and on a cantilever beam. Numerical and experimental results allow identifying the main challenges related to the implementation of structure intensity estimation using full-field and time-resolved data.
Related
- Nonlinear amplification of classical intensity noise and its impact on 𝑔² -measurements
- Graph-theoretic framework for semi-Markov networks: transient and stationary occupation probabilities, hitting times and weak ergodicity breaking
- Time-resolved transient absorption spectroscopy with quantum light
- Resolving Transient Electron-Phonon Coupling with Time-Resolved Spontaneous Raman Spectroscopy.
- Coherent and Incoherent Time-Resolved Diffuse Scattering Intensity from First Principles
BibTeX
@article{meteyer2026structural,
title = {{Structural intensity in thin plates and beams under transient and stationary forces using time-resolved, full-field optical slope measurements}},
author = {Erwan Meteyer and Olivier Robin and Nicolas Madinier and François Gautier and Alain Berry},
journal = {Journal of Sound and Vibration},
year = {2026},
month = oct,
doi = {10.1016/j.jsv.2024.118502},
url = {https://hal.science/hal-05773550v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Structural intensity in thin plates and beams under transient and stationary forces using time-resolved, full-field optical slope measurements
AU - Erwan Meteyer
AU - Olivier Robin
AU - Nicolas Madinier
AU - François Gautier
AU - Alain Berry
PY - 2026
DA - 2026/10/01
JO - Journal of Sound and Vibration
DO - 10.1016/j.jsv.2024.118502
UR - https://hal.science/hal-05773550v1
AB - Structural intensity, or structure-borne intensity or power flow, was introduced in the 1970s and implemented at that time using contact sensors like accelerometers. Point and contactless measurement methods removed added mass and sensor size constraints. Time-resolved and full-field vibration measurement techniques now open new perspectives for the estimation of structural intensity, but these prospects also come with many challenges. In this work, we study the applicability of optical deflectometry measurements to calculate the structural intensity in thin plates or beams under transient and stationary loadings. Since deflectometry directly provides slope fields, a slope formulation of structural intensity is proposed and evaluated. The effect of various parameters like frame rate (sampling frequency) and spatial resolution is studied from a numerical point of view on a simply-supported plate. Experimental results are then presented on a simply-supported plate and on a cantilever beam. Numerical and experimental results allow identifying the main challenges related to the implementation of structure intensity estimation using full-field and time-resolved data.
SN - 0022-460X
SN - 1095-8568
ER -