What does this research mean for the field?

An equivalent-continuum model accurately predicts the lower global vibration modes of hollow lattice-core sandwich plates, though its accuracy decreases for higher modes due to unrepresented local lattice effects. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To investigate the free-vibration response of sandwich plates featuring hollow tetrahedral truss cores and evaluate an equivalent-continuum model for predicting their global natural frequencies.

August 28, 2026Journal of Vibration Engineering & TechnologiesOpen Access

Free Vibration Analysis and Experimental Validation of Sandwich Plates with Hollow Tetrahedral Truss Cores

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Authors

ALAlexis León-Real-FloresUniversidad Nacional Autónoma de México RYRicardo Yáñez-ValdezUniversidad Nacional Autónoma de México

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Implication

Experimental and numerical study reveals substantial stiffening in tetrahedral truss sandwich plates, highlighting reliable continuum frequency predictions.

Key Points

To investigate the free-vibration response of sandwich plates featuring hollow tetrahedral truss cores and evaluate an equivalent-continuum model for predicting their global natural frequencies.
Applied a shear-deformable plate formulation with homogenized core density and stiffness parameters alongside equivalent homogeneous-core finite element simulations.
Conducted experimental vibration testing using impulse-like shaker excitation to identify natural frequencies from acceleration power spectra on both a solid aluminum plate and the truss-core sandwich plate.
Analytical predictions deviated from experimental natural frequencies by approximately 0.6%, 2.0%, and 9.5% across the first three modes, while finite element discrepancies were approximately 4.5%, 0.6%, and 3.3%.
Incorporating the tetrahedral truss core increased specimen mass from 122 to 397 g while increasing the first three experimental natural frequencies by approximately 955.0%, 928.8%, and 602.8%.

Cite This Study

León-Real-Flores et al. (2026) studied this question.

synapsesocial.com/papers/6a91467bd15324a1df3aa19e https://doi.org/10.1007/s42417-026-02705-3

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Implication

Experimental and numerical study reveals substantial stiffening in tetrahedral truss sandwich plates, highlighting reliable continuum frequency predictions.

Free Vibration Analysis and Experimental Validation of Sandwich Plates with Hollow Tetrahedral Truss Cores

Discussion

Member takes

Implication

Key Points

Cite This Study

Free Vibration Analysis and Experimental Validation of Sandwich Plates with Hollow Tetrahedral Truss Cores

Discussion

Member takes

Implication

Key Points

Cite This Study

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