轴对称结构表面声场的非共形重建精度分析

研究了以近场声压重建任意边界条件的轴对称振动体表面声场的一类逆问题.提出了解决该类问题的能克服奇异积分的基于正交函数展开(OFE)与边界元积分(BEI)相结合的数值重建算法.通过对结构在对称或非对称振动下的表面声场的非共形数值重建的精度分析,提供了一种关于轴对称体表面场重建的工程化方法,数值结果也表明了该方法的有效性.

Precision analysis of non-conformal reconstruction for the surface acoustic field on axisymmetric structures

Reconstruction of the surface acoustic field of axisymmetric body with arbitrary boundary conditions using near-field acoustic data is studied in this paper. The method of numerical reconstruction based on orthonormalization function expansion (OFE) and boundary element integral (BEI) is presented which can overcome the singular integral problem in the boundary integral equations. By numerical examples, the precision of reconstruction for the non-conformal surface with the axisymmetric or non-axisymmetric vibrating on axisymmetric body is given. The results of the numerical simulation are shown that this kind of reconstruction method is available for engineering.