نوع مقاله : مقاله پژوهشی
نویسندگان
دانشکده مهندسی مکانیک، دانشگاه تفرش، تفرش، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Acoustic absorbers have been designed and manufactured using various materials, where their impedance must initially match the underwater environment. This matching is directly dependent on the mechanical properties of the materials. In this study, five materials used for the design and construction of acoustic absorbers were investigated. The finite element method, using COMSOL software, was employed to measure the underwater sound absorption coefficient. The simulation setup, including axial symmetry, boundary conditions, and the generation of acoustic waves, was examined. The impact of the materials' mechanical properties, including Young's modulus, density, and loss factor, on the underwater sound absorption coefficient was analyzed. The results show that increasing the Young's modulus of materials such as acrylonitrile butadiene rubber (NBR), which inherently have a low Young's modulus, significantly increases the sound absorption coefficient in the frequency range of 0.2 to 10 kHz compared to other materials. Materials with a high loss factor increase the sound absorption coefficient at frequencies below 1 kHz compared to other materials. Materials such as styrene-butadiene rubber (SBR), which have a density close to that of water, exhibit good impedance matching with the underwater environment and have an excellent sound absorption coefficient in the frequency range of 2 to 10 kHz, which is also dependent on other material properties.
کلیدواژهها [English]
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