基于远场线阵的大型结构体声场重建技术研究  

Reconstruction of large structures sound field using far-field line array

作　　者：周思同 何琳[1,2] 帅长庚 杨家轩[1,2] 张世轲 ZHOU Si-tong;HE Lin;SHUAI Chang-geng;YANG Jia-xuan;ZHANG Shi-ke(Inst.of Noise and Vibration,Naval Univ.of Engineering,Wuhan 430033,China;National Key Laboratory on Ship Vibration and Noise,Wuhan 430033,China)

机构地区：[1]海军工程大学振动与噪声研究所,武汉430033 [2]船舶振动噪声重点实验室,武汉430033

出　　处：《海军工程大学学报》2018年第4期109-112,共4页Journal of Naval University of Engineering

摘　　要：针对大型结构声场重建中需要大面积的测点布放的难题,首先,根据波叠加方法的声全息技术,结合声振耦合软件virtual.lab重建了圆柱壳模型在单频激励作用下的空间声场;然后,通过仿真分析了阵元数、空间位置、等效源形状等因素对重建精度的影响;最后,将波叠加法的计算结果与理论值进行了对比,二者结果一致,由此证明了基于水平线阵的大型结构体声场重建技术的可行性,而且其计算效率高、精度满足工程应用要求。Considering that reconstruction of large structures sound field requires amounts of measurement points,the method of using far-field line array to reconstruct large structures sound field is proposed.According to the wave superposition method(WSM)acoustic holography,by using virtual.lab,the sound field of a large ellipsoid shell model with a single frequency force load is reconstructed.By simulation,the factors of reconstruction accuracy such as array number,spatial location and equi-valent sources shapes are analyzed.The comparison of the results calculated by using the WSM and theoretical value proves that it is feasible and effective to use line array to reconstruct the sound field of large structures which costs short calculating time.The efficiency and the calculation accuracy satisfy engineering application.The proposed method provides an engineering reference for the acoustic measurement,acoustic structural design and sound reconstruction.

关 键 词：波叠加法 线列阵 声场重建 

分 类 号：TH535[机械工程]