کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
512311 866398 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transmission loss prediction of silencers by using combined boundary element method and point collocation approach
ترجمه فارسی عنوان
پیش بینی از دست دادن انتقال خاموش کننده ها با استفاده از روش ترکیبی عنصر مرزی و روش هماهنگی نقطه
کلمات کلیدی
مفصلی خفه کن، از دست دادن انتقال، روش عنصر مرزی، رویکرد جابجایی نقطه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی

A technique that combines the boundary element method (BEM) and the point collocation approach is proposed to calculate the transmission loss (TL) of silencers in the absence of mean flow and temperature gradient. A long silencer is first divided into several substructures for analysis purposes. The point collocation approach is applied to produce the impedance matrices of any long substructure that has an axially uniform cross section to produce its impedance matrix. On the other hand, the direct mixed-body BEM is used to produce the impedance matrices of any irregular sections. The point collocation approach employs a modal expansion of the cross-sectional modes extracted by the 2D finite element method (FEM), and then matches the sound pressures and particle velocities at the collocation points on both ends to calculate the impedance matrix. All the substructure impedance matrices are then combined to form the resultant impedance matrix of the whole silencer for TL computation. Several test cases are presented to valid the combined technique and to demonstrate its computational efficiency.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Analysis with Boundary Elements - Volume 61, December 2015, Pages 265–273
نویسندگان
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