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推荐一篇文章，其中提出了一种多重声衍射的解析计算方法，并使用sysnoise5.5提供的BEM结果对提出的解析方法进行了可靠的验证。可能对正在做多重衍射、声屏障计算、设计的朋友提供一些方法上的帮助；其中的实例都经过仔细验证，也可以给正在用SYSNOISE练手的朋友提供些验证实例，特别是在做声屏障计算方面。（两个附件存到本地后，将后缀名改为.rar即可正确解压并打开pdf）
国内目前有朋友（如武汉大学、北京劳保所）正在做Sound Scape的建模工作，其中对多种建筑或多重障碍物的声衍射（屏蔽）计算就比较头痛；我想这篇文章可以在这方面提供有益的帮助。
场合：多种声衍射；多重屏障、多重建筑物的声屏蔽计算
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Multiple acoustic diffraction around rigid parallel wide barriers
J. Acoust. Soc. Am. Volume 126, Issue 1, pp. 179-186 (July 2009)
Issue Date: July 2009
Hequn Min and Xiaojun Qiu
State Key Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, People's Republic of China
A ray-based method is presented for evaluating multiple acoustic diffraction by separate rigid and parallel wide barriers, where two or more neighboring ones are of equal height. Based on the geometrical theory of diffraction and extended from the exact boundary solution for a rigid wedge, the proposed method is able to determine the multiple diffraction along arbitrary directions or at arbitrary receiver locations around the diffracting edges, including the positions along the shadow or reflection boundaries or very close to the edges. Comparisons between the results of the numerical simulations and the boundary element method show validity of the proposed method.
©2009 Acoustical Society of America
Keywords
acoustic wave diffraction, boundary-elements methods, receivers
Multiple acoustic diffraction around rigid parallel wide barriers.part1.txt
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Multiple acoustic diffraction around rigid parallel wide barriers.part2.txt
(100.94 KB, 下载次数: 112)
[ 本帖最后由 minetree 于 2009-7-17 17:37 编辑 ] |
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发表于 2009-7-17 17:34
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发表于 2009-7-20 11:14
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