一种新型高保真声压探头组在模态测试中的应用  

Application of a New High Fidelity Sound Pressure Probe Set in Modal Testing

作　　者：郭瑞娟 马广轩 张占一[1] 王灿 GUO Ruijuan;MA Guangxuan;ZHANG Zhanyi;WANG Can(China Orient Institute of Noise and Vibration, Beijing 100085, China)

机构地区：[1]北京东方振动和噪声技术研究所,北京100085

出　　处：《噪声与振动控制》2018年第A02期411-414,共4页Noise and Vibration Control

摘　　要：对于质量较轻、结构对称及无法粘贴接触式传感器的结构试件,利用声振互易性原理,采用移动敲击点、固定多个声压传感器的测量方法进行模态试验,解决了传感器附加质量的影响并避免了结构重根被破坏。通常此种方法需要使用过个支架固定多个声压传感器进行MIMO模态测试,固定支架及现场拉线工作较为繁杂;且试验获取数据量较大,结合传统模态分析方法使得模态拟合过程较慢。本文介绍了一种新型高保真声压探头组,使得模态试验过程极大简化,且数据分析结合模态提纯参数识别算法,使得模态分析快速高效;同时,结合3个工程实际案例验证了本方法的有效性。该新型设备为今后相关领域模态试验提供了一种新思路,极大地提高了模态试验的效率。For structural specimens with lighter weight, structural symmetry, and non-adhesion of contact sensors, the modal test is performed using the principle of vibro-acoustical reciprocity and the measurement method of moving strike points and fixing multiple acoustic pressure sensors. Thus, the effect of the additional mass of the sensor and the structural damage are avoided. In general, this method requires using multiple supports to fix multiple sound pressure sensors for MIMO modal testing. The fixed support and field wiring work is complicated, the amount of data acquired during the test is large, and the modal fitting process is in pool efficiency to fitting with the traditional modal analysis methods. This paper introduces a new type of high fidelity sound pressure probe set, which greatly simplifies the modal test process. The data analysis combined with the modal identification algorithm for the purification parameter makes the modal analysis fast and efficient. At the same time, it has been verified with three engineering real cases, and the effectiveness of this method is verified. This new type of equipment provides a new way of thinking for modal testing in related areas in the future, greatly improving the efficiency of modal tests.

关 键 词：声学 新型声压探头组 高保真 声振互易性 模态提纯算法 模态试验 

分 类 号：O329[理学—一般力学与力学基础]