نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
2 مهندسی فناوری ماهواره-دانشکده فناوری های نوین-دانشگاه علم و صنعت ایران-تهران-ایران
3 دانشجوی دکترا، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
4 دانشکده فناوری های نوین دانشگاه علم و صنعت ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this paper, the thermoacoustic behavior of a functionally graded cylindrical shell reinforced with carbon nanotubes in the presence of a temperature gradient is investigated. The structure is submerged in an external flow and is excited by an oblique sound wave. The shell is made of ceramic material, and the carbon nanotubes are distributed in a graded form in the thickness direction. The effective properties of the constituents are also assumed to be temperature-dependent. Hamilton's principle and third-order shear deformation theory are used to derive the dynamic equations of shell motion. Then, using the interactions of fluid and structure, the acoustic equations of the shell are determined. Finally, the effect of physical and environmental parameters on the sound transmission of the shell is investigated. According to the results, the effect of carbon nanotube distribution on sound transmission is more significant at high frequencies, and increasing the temperature due to reducing the stiffness of the structure decreases the sound transmission loss.
کلیدواژه‌ها [English]
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