The Properties of Materials and Structures of Fluted PVC Panels for the Transmission of Airborne Sound

Kopania, Joanna; Zakrzewicz, Wojciech; Kubiak, Przemysłąw; Mrowicki, Adam; Głogowski, M; Gralewski, J; Bogusławski, G; Wójciak, Kamil

doi:10.3390/app12115732

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…The corrugated plate inside the profile has a tremendous influence on the vibroacoustic characteristics of extruded profiles. Kopania et al (2022) studied the STL and absorption of fluted PVC panels using experimental and theoretical methods. However, the vibroacoustic characteristics of extruded profiles excited by a turbulent boundary layer (TBL) are rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Vibroacoustic response of a high-speed train extruded profile under fluid-induced vibration

Zhang

Tang

et al. 2022

Journal of Vibration and Control

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The wall pressure fluctuation caused by a turbulent boundary layer is an important source of noise and vibration in high-speed trains. Considering that railway vehicles are usually made of extruded profiles, a simple and reliable model is needed to predict the vibroacoustic characteristics of extruded profiles excited by a TBL in the early stages of design. A hybrid finite element and statistical energy analysis model is established for computing the vibroacoustic response of finite-sized panels excited by a TBL. In the hybrid model, the wall pressure fluctuation of the TBL is modelled in the wavenumber domain. The panels are modelled using FEs, and acoustic waves in the fluid space below the panels are modelled using SEA. The TBL wall pressure acting on the top surface of the panels is resolved into equivalent nodal forces with discretization of the structure using FEs, achieved by calculating the cross-spectrum matrix of the wall pressure in the spectral domain and using jinc functions with smooth boundary and symmetric properties as shape functions. The reciprocity between direct and reverberant fields couples the acoustic fields to the structure. Once the response of the hybrid model is determined, sound transmission through the panels can be calculated. By following the procedures outlined in this paper, the range of wall pressure model selection for TBL has extended and reduced computational time and provides a basis for the acoustic optimization design of extruded profiles.

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Section: Introductionmentioning

confidence: 99%

Vibroacoustic response of a high-speed train extruded profile under fluid-induced vibration

Zhang

Tang

et al. 2022

Journal of Vibration and Control

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Azimuthal Solar Synchronization and Aerodynamic Neuro-Optimization: An Empirical Study on Slime-Mold-Inspired Neural Networks for Solar UAV Range Optimization

Hazare,

Sultan,

Mika

et al. 2024

Applied Sciences

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This study introduces a novel methodology for enhancing the efficiency of solar-powered unmanned aerial vehicles (UAVs) through azimuthal solar synchronization and aerodynamic neuro-optimization, leveraging the principles of slime mold neural networks. The objective is to broaden the operational capabilities of solar UAVs, enabling them to perform over extended ranges and in varied weather conditions. Our approach integrates a computational model of slime mold networks with a simulation environment to optimize both the solar energy collection and the aerodynamic performance of UAVs. Specifically, we focus on improving the UAVs’ aerodynamic efficiency in flight, aligning it with energy optimization strategies to ensure sustained operation. The findings demonstrated significant improvements in the UAVs’ range and weather resilience, thereby enhancing their utility for a variety of missions, including environmental monitoring and search and rescue operations. These advancements underscore the potential of integrating biomimicry and neural-network-based optimization in expanding the functional scope of solar UAVs.

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The Properties of Materials and Structures of Fluted PVC Panels for the Transmission of Airborne Sound

Cited by 2 publications

References 34 publications

Vibroacoustic response of a high-speed train extruded profile under fluid-induced vibration

Vibroacoustic response of a high-speed train extruded profile under fluid-induced vibration

Azimuthal Solar Synchronization and Aerodynamic Neuro-Optimization: An Empirical Study on Slime-Mold-Inspired Neural Networks for Solar UAV Range Optimization

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