METAmaterials for VIbration and Sound reductION

Project Information

METAVISION

Grant agreement ID: 101072415

DOI

10.3030/101072415

EC signature date 6 July 2022

Start date 1 March 2023

End date 28 February 2027

Funded under

• Marie Skłodowska-Curie Actions (MSCA)

Total cost

No data

EU contribution

€ 2 644 804,80

Coordinated by

KATHOLIEKE UNIVERSITEIT LEUVEN
Belgium

Periodic Reporting for period 1 - METAVISION (METAmaterials for VIbration and Sound reductION)

Reporting period: 2023-03-01 to 2025-02-28

Summary of the context and overall objectives of the project

METAVISION aims to reconcile two conflicting trends. On the one hand, people become increasingly aware of the negative health impact of excessive noise and vibration exposure. On the other hand, every kilogram of mass removed from the logistics chain has a direct economic and ecological benefit. Current noise and vibration solutions, however, still typically require too much mass or volume to be practically feasible, particularly for lower frequencies. Hence, there is a strong need for low mass, compact material solutions with excellent noise and vibration characteristics, for which recently emerged so-called metamaterials have shown immense potential.

The overarching goal of METAVISION is to provide high-quality training on these innovative lightweight noise and vibration solutions to a new generation of high achieving doctoral candidates and to provide them with the scientific and transferable skills needed for successful careers in this increasingly key area which brings together scientific, technological, and societal challenges. This will be achieved by combining a research programme which aims to (i) develop novel design and analysis methods in view of broadening the performance and applicability of metamaterials, (ii) revolutionize the manufacturing of metamaterials towards large-scale and versatile solutions and (iii) advance academically proven metamaterial concepts towards industrially relevant applications, with an interdisciplinary training programme composed of scientific and transferable skill courses and intersectoral and international secondments. Both programmes are brought together in unique industrial demonstrator projects.

The METAVISION consortium gathers universities, research institutes and small- and large-scale industry from manufacturing, construction, transportation, and machine design sectors with the relevant expertise to create the coordinated research environment needed to bring metamaterials from academic concepts to large-scale manufacturable and industrially applicable noise and vibration solutions, paving the way towards a quieter and greener Europe.

Work performed from the beginning of the project to the end of the period covered by the report and main results achieved so far

In WP1, DCs 2 & 11 worked on novel reduced-order modeling and fast optimization: DC2 worked on reduced order frameworks for fast and parametric (stochastic) analysis of (in)finite metamaterials. DC11 worked on efficient modeling for fast parametric analysis of chiral phononic crystals, incorporating viscoelastic materials, and developing a machine learning based optimization routine. Besides, DCs 1, 2, 3, 6, 8 and 9 worked on enhancing broadband and (omni)direction sound absorption and/or sound transmission loss: DC1 modeled and analyzed the potential of wire mesh gratings as sound absorbers. DC2 investigated the impact of resonator detuning on performance broadening. DC3 took first steps in the modeling of waveguides with scatterers. DC6 developed (equivalent) models and performed first experiments for sonic crystal noise barriers with Helmholtz resonators. DC8 developed fast modeling and optimization routines to simulate and optimize the sound transmission of metamaterial partitions. DC9 investigated the trade-off between acoustic performance and structural efficiency of finite sonic crystal barriers via simulation and first experiments.
In WP2, DC4 worked on improving conventional manufacturing-based metamaterial production. Besides investigating manufacturing variability in injection moulded metamaterials, DC4 investigated the redesign for injection moulding of nonlinear locally resonant metamaterials. DC5 worked on improving additive manufacturing-based metamaterial production. Focusing on selective laser sintering, DC5 investigated the correlations between dimensional variations, printer bed temperature, and the natural frequency of printed beams. DCs 2 and 10 took first steps towards the development of novel combined metamaterial manufacturing methods: DC2 developed reduced order modeling strategies to simulate the impact of geometric variability, for uncertainty propagation in novel manufacturing frameworks. DC10 took first steps in investigating the combination of a metablocker metamaterial with an acoustic black hole plate.
In WP3, DCs 9, 10, 11 researched finite structure and boundary condition effects: DC9 developed models for finite phononic crystals to assess the effect of geometric variations and performed first tests. DC10 developed (reduced) models for and studied finite structure and boundary condition effects of a metablocker acoustic metamaterial. DC11 investigated the impact of imperfect axial excitation in chiral phononic crystals. DCs 4 and 5 worked on understanding and exploiting variability and uncertainty effects in vibro-acoustic metamaterials: DC4 performed a simulation-based investigation of the performance bounds for different injection moulded production parameters on resonator level. DC5 investigated the dimensional accuracy and vibrational properties of selective laser sintered parts. DCs 7 and 9 focused on improving and extending vibro-acoustic performance metrics: DC7 set up a workflow for obtaining objective and subjective metrics, applied to micro-perforated panels, and performed initial validations.
In WP4, 3 industrially relevant demonstrator projects have been defined. All 3 projects have started, and for 2 out of 3 projects, the first demonstrator secondment took place.

Progress beyond the state of the art and expected potential impact (including the socio-economic impact and the wider societal implications of the project so far)

WP1:
- DC1 developed an equivalent medium model for wire mesh structures, revealing broadband absorption and near omnidirectional large absorption potential.
- DC2 developed reduced order modeling approaches for (in)finite metamaterial beams with parametric variations (material, geometry).
- DC6 provided numerical evidence of broadband performance potential of porous concrete phononic crystals.
- DC8 developed an efficient hybrid approach to predict the performance of metamaterial partitions. With DC7, a metamaterial was optimized to both objective and subjective metrics.
- DC11 developed a reduced order modeling approach for chiral phononic crystals, designed a chiral phononic crystal with viscoelastic inserts, developed a rapid dispersion curve calculation method, and developed a machine learning based fast optimization routine.
WP2:
- DC4 manufactured a nonlinear structural resonator using injection moulding.
- DC5 produced first insights in the impact of the selective laser sintering manufacturing on geometric and dynamic properties of simple beam resonators.
WP3:
- DC4 developed a simulation based approach to propagate injection moulding parameter bounds to metamaterial performance bounds.
- DC7 developed a framework to obtain sensitivies for objective and subjective metamaterial performance metrics.
- DC9 produced first model and test based insights in the performance of (in)finite height sonic crystal barriers subjected to diffuse field incidence.
- DC11 came to first insights in the performance of imperfect axially excited chiral phononic crystals.