Presentation slides

Abstract:

This work demonstrates the application of a multiresonant metamaterials concept to tyres in order to reduce structure-borne road noise. Special attention is given to the frequency range around 220Hz, containing the first acoustic tyre resonances. These resonances are known to transmit high forces to the wheel-knuckle, leading to structural energy propagating into the vehicle’s body and, consequently, causing a tonal noise issue in the vehicle compartment. By adding recycled rubber resonant elements to the inner liner of the tyre, structural stop band behaviour is achieved in the frequency band of interest. Hence, structural vibrations in the tyre are reduced, resulting in a reduction of the excitation of the first acoustic tyre resonances and, consequently, a mitigation of the transmitted forces to the wheel-knuckle. First, numerical simulations are performed using a tyre mock-up that only accounts for its structural behavior. Next, the multiresonant metamaterials are produced and added to the tyre. Finally, an experimental campaign is carried out to verify the performance of resonant metamaterials in static and rolling conditions.

About the Speaker:

Luca Sangiuliano is currently the R&D Manager of Phononic Vibes and manages the Automotive and lightweight metamaterial Business Unit. He received his PhD at KU Leuven on metamaterials and worked on several automotive NVH and lightweight-related projects.

@LS 
R&D Manager, Phononic Vibe 
 

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