کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9640310 | 509853 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Acoustic analysis of a finite cylindrical duct based on Green's functions
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
An approximate acoustic model of a finite cylindrical duct for studying the sound radiation of MRI scanners is presented in this paper. The finite duct was regarded as a “virtually closed cavity” with a specific boundary definition at the two open ends. The eigenfunctions Ï chosen as consisting of the acoustic modes at the cut-off frequencies were used for the Green's functions to solve the Kirchhoff-Helmholtz (K-H) integral. The sound fields calculated by the analytical model were similar to the results obtained by the boundary element method (BEM) model except for some relatively minor differences in the region close to the open ends. When compared to the previous work, this model is relatively simple and much more computationally efficient.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 287, Issues 4â5, 4 November 2005, Pages 979-988
Journal: Journal of Sound and Vibration - Volume 287, Issues 4â5, 4 November 2005, Pages 979-988
نویسندگان
W. Shao, C.K. Mechefske,