基于声场辐射的铝板冲击载荷信号反演  

Inversion of Impact Load Signal of Aluminum Plate Based on Sound Field Radiation

作　　者：蔡宇航 梁栋[1] 姜学平[1] 郭文杰 CAI Yu-hang;LIANG Dong;JIANG Xue-ping;GUO Wen-jie(College of Internet of Things Engineering,Information Department,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学信息学部物联网工程学院,江苏南京211100

出　　处：《测控技术》2022年第6期81-85,94,共6页Measurement & Control Technology

基　　金：国家自然科学基金(51405409,11574072,11274091);江苏省重点研发计划项目(BE2016056);声场声信息国家重点实验室开放课题研究基金(SKLA201913);中央高校基本科研业务费(2018B04514);江苏省重点研发计划(社会发展)(BE2019649);常州市科技支撑计划(社会发展)项目(CE20215017)。

摘　　要：在结构健康监测中获取结构响应是非常重要的。基于由载荷引发的结构损伤问题,通过对铝板上的冲击载荷产生的声场进行研究来获取结构响应。通过声模态叠加法模拟出声场模型,运用近场声全息技术反演声场,分析声场信息;然后通过设计反演算法来实现对载荷冲击信号的反演,为结构损伤的分析评估提供一个参考因素;最后,选定激励信号对载荷冲击信号进行模拟,结合声场的正向重建和逆向重建过程,得到反演信号,并与原信号进行对比,验证了该方案的可行性。It is very important to obtain structural response in structural health monitoring.Based on the structural damage caused by load, the structural response is obtained by studying the sound field generated by the impact load on the aluminum plate.The sound field model is simulated by acoustic mode superposition, the sound field is inverted by using near-field acoustic holography technology, and the sound field information is analyzed.Then the inversion algorithm is designed to realize the inversion of load impact signal, which provides a reference factor for the analysis and evaluation of structural damage.Finally, the excitation signal is selected to simulate the load impact signal.Combined with the forward and reverse reconstruction process of sound field, the inversion signal is obtained, and compared with the original signal to verify the feasibility of this scheme.

关 键 词：结构健康监测 载荷冲击 声模态叠加 近场声全息 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置] TP399[自动化与计算机技术—控制科学与工程]