بحرینی, عباس
پژوهشکده مهندسی کامپوزیت دانشگاه صنعتی مالک اشتر
[ 1 ] - بررسی روشهای بهبود جذب صدا در فوم آلومینیوم 5083
رفتار جذب صدای فومهای ﺁلومینیوم 5083 یاخته- باز (سلول- باز) تولیدشده با استفاده از روش فضاساز مطالعه شد. ضریب جذب صدای نمونهها در محدوده 500-10.000 هرتز بوسیله روش تابع انتقال بررسی گردید. جذب صدای فومهای ﺁلومینیوم 5083 با دو اندازه یاخته (سلول) کمتر از 106 و 106-250 بررسی شد. ضمن اینکه اثر افزودنی کاربید سیلسیم با 10 درصد حجمی مورد مطالعه قرار گرفت. اثر شکاف هوایی بر ضریب جذب صدا نیز بررسی...
[ 2 ] - Investigation of the effect of electrolyte on acoustical behaviour of ceramic coatings produced by method Plasma Electrolytic Oxidation (PEO) on titanium
In this paper, titanium oxide coating (TiO2) was produced on titanium alloy Ti6Al4V by Plasma Electrolytic Oxidation (PEO) Method. Sodium Silicate (Na2SiO3) and Sodium Aluminate (NaAlO2) based electrolytes were selected in PEO process. The effects of concentration of Sodium Aluminate (0, 2.5, 5, 7.5, and 10 g/L) on the microstructure and acoustical behaviour of the formed coatings were studied....
[ 3 ] - Acoustic damping performance of aluminum nanocomposite foams with different additive of carbon nanotubes and comparison that with conventional rockwool (Research Article)
Open cell aluminum foams have good acoustic dampening properties. In this research, in order to improve the sound damping capacity of these foams, 0.9, 1.5 and 3wt% carbon nanotubes were added to the aluminum foam. Foams were produced by the space holder method in powder metallurgy. The results showed that Al-0.9wt%CNT nanocomposite foam had the highest average sound transmission loss in the fr...
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