基于正交球面波源边界点法的声学灵敏度分析  

ACOUSTIC SHAPE SENSITIVITY ANALYSIS BASED ON ORTHOGONAL SPHERICAL WAVE SOURCE BOUNDARY POINT METHOD

作　　者：张永斌[1] 毕传兴[1] 陈剑[1] 陈心昭[1] 

机构地区：[1]合肥工业大学噪声振动工程研究所,合肥230009

出　　处：《机械工程学报》2007年第2期33-38,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(10504006;50575063);安徽省自然科学基金(050440107)资助项目

摘　　要：提出采用正交球面波源边界点法作为声学灵敏度算法,计算空间任意点的声学量关于设计变量的灵敏度,克服基于边界元的声灵敏度分析中所固有的各阶奇异积分和非唯一性问题,降低数值处理难度和工作量。提出近场声全息与声学灵敏度的组合分析方法,利用声全息重建出表面法向振速及其导数,然后再进行灵敏度分析,解决表面声学量获取困难的问题。数值仿真的结果充分证明该声学灵敏度分析方法的正确性和可行性。The orthogonal spherical wave source boundary point is proposed to the acoustic shape sensitivity of any point in an acoustic field. In the method, the problems of the non-uniqueness and singularity caused by using the boundary element method are avoided, and the numerical calculation becomes easier. Furthermore, the nearfield acoustic holography is used to reconstruct the surface normal velocity and its difference on the source surface in the acoustic shape sensitivity analysis, which avoids the straightforward calculation of those acoustic qualities. The numerical simulations on some typical sources validate the feasibility and correctness of the proposed method.

关 键 词：声灵敏度 边界点 球面波 近场声全息 

分 类 号：TB532[理学—物理] TB533.2[理学—声学]