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ADAPTIVE ELLIPSOIDAL ACOUSTIC INFINITE ELEMENT 被引量：1

ADAPTIVE ELLIPSOIDAL ACOUSTIC INFINITE ELEMENT
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摘要 It is shown that the basis of the ellipsoidal acoustic infinite elementBurnett method, the multipole expansion, cannot represent real ellipsoidal acoustic field exactly.To solve the problem, a weight of angular direction is added to the multipole expansion. Thecomparison of the modified method and the prime method shows that the modified method can describeand solve the ellipsoidal acoustic field more accurately than ever. A dilating sphere is used totest the new method further. Unlike other infinite element methods, varied ratio of the ellipsoidalartificial boundary instead of sphere is used. The pressure value of the artificial boundary isutilized as the initial value of the new method. Then the radiating phenomena of the ellipsoidalacoustic field can be researched using the new method. These examples show the feasibility of theadaptive method. It is shown that the basis of the ellipsoidal acoustic infinite elementBurnett method, the multipole expansion, cannot represent real ellipsoidal acoustic field exactly.To solve the problem, a weight of angular direction is added to the multipole expansion. Thecomparison of the modified method and the prime method shows that the modified method can describeand solve the ellipsoidal acoustic field more accurately than ever. A dilating sphere is used totest the new method further. Unlike other infinite element methods, varied ratio of the ellipsoidalartificial boundary instead of sphere is used. The pressure value of the artificial boundary isutilized as the initial value of the new method. Then the radiating phenomena of the ellipsoidalacoustic field can be researched using the new method. These examples show the feasibility of theadaptive method.
作者 Yang Ruiliang Wang Hongzhen State Key Laboratory of Vibration,Shock & Noise,Shanghai Jiaotong University,Shanghai 200030, China
出处 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2004年第2期293-296,共4页 中国机械工程学报（英文版）
关键词 Burnett method Multipole expansion Infinite element Burnett method Multipole expansion Infinite element
分类号 TB51 [理学—声学]
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参考文献16

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同被引文献11

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  • 9Shirron Joseph J, Babuska Ivo. A comparison of approximate boundary conditions and infinite element methods for exterior Helmholtz problems[ J]. Comput Methods Appl Mech Engrg, 1998, 164(1):123-139.
  • 10Shirron Joseph J, Dey Saikat. Acoustic infinite elements for non-separable geometries[ J]. Comput Methods Appl Mech Engrg, 2002,191 (5) :4123-4139.

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Chinese Journal of Mechanical Engineering
2004年 第2期

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