文章摘要
李宏伟,陈克安,姜建伟.半球封闭圆柱体表面绕射声场研究[J].,2008,27(1):30-35
半球封闭圆柱体表面绕射声场研究
An analysis of the diffracted sound fields on the surface of a hemispherically terminated cylinder
  
中文摘要:
      基于一致性几何绕射理论,对半球封闭圆柱体上半球表面的高频绕射声场进行了数值计算与分析。获得了单个点声源作用下,半球表面声场的声压分布图,其中包括一些干涉条纹,干涉条纹的区域及形状与点声源的位置和频率有关;在多个点声源作用下,发现在接近半球顶点的附近,多个声波经多途传播后在该区域的叠加声压由衰减转为增强的现象。
英文摘要:
      An approximate solution is presented for the diffracted sound fields on the surface of the hemisphere of a hemispherically terminated cylinder by the use of the uniform geometrical theory of diffraction.The distribution of the sound pressure with some interference stripes are obtained,which are induced by a point source on the cylindrical surface.The area and the shape of the interference strips depend on the locality and the frequency of the point source.Acted by multiple sources,it is discovered that in the neighborhood of the tip point of the hemisphere,after multi-path spread of the sound waves,the sound pressure is turned from decreasing to increasing.
DOI:10.11684/j.issn.1000-310X.2008.01.006
中文关键词: 一致性几何绕射理论  绕射声场  半球封闭圆柱体
英文关键词: Uniform geometrical theory of diffraction  Diffracted sound fields  Hemispherically terminated cylinder
基金项目:
作者单位
李宏伟 西北工业大学航海学院,西安,710072 
陈克安 西北工业大学航海学院,西安,710072 
姜建伟 洛阳船舶材料研究所,洛阳,471039 
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