基于声辐射模态理论的平面近场瞬态声全息  

Planar near field transient acoustic holography based on acoustic radiation modal theory

作　　者：田湘林[1] 楼京俊[2] TIAN Xiang-lin;LOU Jing-jun(College of Power Engineering, Naval Univ. of Engineering, Wuhan 430033, China;College of Naval Architecture & Ocean Engineering, Naval Univ. of Engineering, Wuhan 430033, China)

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]海军工程大学舰船与海洋学院,武汉430033

出　　处：《海军工程大学学报》2019年第2期100-105,共6页Journal of Naval University of Engineering

摘　　要：为了避免二维傅立叶变换算法引起的卷绕误差,首先从理论上推导出重建的公式、分析了重建中产生的误差,并给出了减小重建误差的方法;然后,以三个初始振动幅值不一样的刚性脉动球作为声源,采用本文提出的方法重构出声场,计算表明重构是有效的。In order to avoid the wrap error caused by the two-dimensional Fourier transform algorithm, a planar near-field transient acoustic holography is proposed based on the acoustic radiation modal theory, the reconstruction formula is deduced theoretically and the errors existing in the reconstruction are analyzed. A method of reducing the error of reconstruction is given. In the simulation, three rigid pulsations with different initial vibration amplitude are used as the sound source, and the sound field is reconstructed by the proposed method. The calculation result shows that the reconstruction is effective.

关 键 词：近场 瞬态声全息 声辐射模态 

分 类 号：TH165.3[机械工程—机械制造及自动化]