Experiments and FE Analyses on Airborne Sound Properties of Composite Structural Insulated Panels

Wawrzynowicz, Adam; Krzaczek, M.; Tejchman, J.

doi:10.2478/aoa-2014-0040

Cited by 15 publications

(5 citation statements)

References 19 publications

(15 reference statements)

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“…Considering the periodical one-way stiffened feature of the corrugated core, the sandwich panel studied in this paper is assumed to have an infinite length in the reinforced direction [28]. As a result, the dynamic response of the sandwich panel can be simplified into a plane strain problem, and only the cross section of the sandwich structure is considered.…”

Section: Theoretical Formulationmentioning

confidence: 99%

Sound Insulation of Corrugated-Core Sandwich Panels: Modeling, Optimization and Experiment

Ren

Yang²,

Liu

et al. 2021

Materials

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With the extension of the applications of sandwich panels with corrugated core, sound insulation performance has been a great concern for acoustic comfort design in many industrial fields. This paper presents a numerical and experimental study on the vibro-acoustic optimization of a finite size sandwich panel with corrugated core for maximizing the sound transmission loss. The numerical model is established by using the wave-based method, which shows a great improvement in the computational efficiency comparing to the finite element method. Constrained by the fundamental frequency and total mass, the optimization is performed by using a genetic algorithm in three different frequency bands. According to the optimization results, the frequency averaged sound transmission of the optimized models in the low, middle, and high-frequency ranges has increased, respectively, by 7.6 dB, 7.9 dB, and 11.7 dB compared to the baseline model. Benefiting from the vast number of the evolution samples, the correlation between the structural design parameters and the sound transmission characteristics is analyzed by introducing the coefficient of determination, which gives the variation of the importance of each design parameter in different frequency ranges. Finally, for validation purposes, a sound insulation test is conducted to validate the optimization results in the high-frequency range, which proves the feasibility of the optimization method in the practical engineering design of the sandwich panel.

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Section: Theoretical Formulationmentioning

confidence: 99%

Sound Insulation of Corrugated-Core Sandwich Panels: Modeling, Optimization and Experiment

Ren

Yang²,

Liu

et al. 2021

Materials

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“…It depends to a large extent from the Age of the listener. With age range of ten is shrinking, especially from the High sounds (Puria, Rosowski 2012;Wawrzynowicz et al 2014) [1].…”

Section: General Requirements (Main Text)mentioning

confidence: 99%

The Noise Produced by the Air Handling Units Depending on the Type of Engine

Gładyszewska-Fiedoruk

Jachimowicz

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. The elaboration is the study is to examine the difference in the sound level in the air handling units made by the same producer. These units are of the same design parameters and components, and supply air and exhaust air. The only difference is mounted engines. Tested air handling units are equipped with an engine type EC, and traditional direct drive, controlled by an converter. Sound level measurements were carried out in the ducts supply air ventilation system at a distance of 1 m from the air handling unit and for the unit at a distance of 2 m from the inspection door of the fan section of the supply, with 3 settings efficiency of units 30%, 60% and 90%. Tested headquarters are located inside the building. Excessive noise has a negative effect on the human body, resulting in fatigue, difficulty in learning and concentration, impaired orientation, annoyance, increase in blood pressure, headaches, dizziness, and in the worst case of temporary or permanent hearing loss.

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“…In (Wawrzynowicz et al, 2014), the acoustic sound insulation performances of cement and foamed composite materials were studied via FEM simulation to analyze the transient and steady states of twodimensional and three-dimensional models. In addition, experimental measurements were made to compare sound absorption rates.…”

Section: Introductionmentioning

confidence: 99%

Impulse Excitation in a Watertight Steel Circular Cylindrical Shell and Influence of Structural Configuration on Underwater Radiated Noise

2023

Archives of Acoustics

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This study used experimental measurements and the finite-element method (FEM) simulations to investigate transient underwater radiated noise induced by the impulse excitation of water surrounding a watertight steel-structured circular cylindrical shell submerged in the 176 × 8 × 4 m towing tank. The excitation was caused by dropping an iron block onto a structural bracket in the shell to generate structural vibration. The experimental results were found to be consistent with the FEM results, with the difference between the experimental and simulated sound pressure levels being less than 3 dB. Moreover, it was determined that the structural vibration also generated airborne noise in the cylindrical shell, but this contributed much less than the impulse excitation to the induction of underwater radiated noise. Finally, analysis of the sound field of the underwater noise radiation showed that it was influenced by the wall thickness of the watertight steel cylindrical shell and that of the reinforced bracket seat structure. In particular, the structural reinforcement position proved to be the diffusion breakpoint of the underwater sound radiation. This demonstrates that compared with the studied structure, a thicker and more complex reinforced structure will transmit less or incomplete sound radiation into water.

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Experiments and FE Analyses on Airborne Sound Properties of Composite Structural Insulated Panels

Cited by 15 publications

References 19 publications

Sound Insulation of Corrugated-Core Sandwich Panels: Modeling, Optimization and Experiment

Sound Insulation of Corrugated-Core Sandwich Panels: Modeling, Optimization and Experiment

The Noise Produced by the Air Handling Units Depending on the Type of Engine

Impulse Excitation in a Watertight Steel Circular Cylindrical Shell and Influence of Structural Configuration on Underwater Radiated Noise

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