冼志濠1  刘诚2  赖源平1  李昌2

（1.广州市自来水有限公司北部水厂，广东 广州 510000

2.广东省科学院智能制造研究所，广东 广州 510070）

摘要：为了提升供水管道声音信号采集的可靠性，基于模态分析技术对声学采集探头进行研究。首先，利用三轴加速度传感器采集供水管道的振动信号，以评估声学采集探头的振动激励情况；然后，利用SolidWorks和ANSYS Workbench软件建立声学采集探头的动力学模型，获取其振动模态；最后，根据声学采集探头的振动激励情况和振动模态分析结果，对其结构进行优化，通过增加声学采集探头内腔体底部的厚度，提高其固有频率，避免声学采集探头与供水管道共振，提升声音信号采集的可靠性。

关键词：声学采集探头；模态分析；振动激励；振动模态；供水管道

中图分类号：TH128         　文献标志码：A      　   文章编号：1674-2605(2024)03-0002-05

DOI：10.3969/j.issn.1674-2605.2024.03.002

Modal Analysis of Acoustic Acquisition Probe for Water Supply Pipeline 

XIAN Zhihao1  LIU Cheng2  LAI Yuanping1  LI Chang2

(1.Northern Waterworks, Guangzhou Water Supply Co., Ltd., Guangzhou 510000, China

2.Institute of Intelligent Manufacturing, Guangdong Academy of Science, Guangzhou 510070, China)

Abstract: In order to improve the reliability of sound signal acquisition in water supply pipelines, research was conducted on acoustic acquisition probes based on modal analysis technology. Firstly, the vibration signal of the water supply pipeline is collected using a three-axis accelerometer to evaluate the vibration excitation of the acoustic acquisition probe; Then, using SolidWorks and ANSYS Workbench software, establish a dynamic model of the acoustic acquisition probe and obtain its vibration mode; Finally, based on the vibration excitation and modal analysis results of the acoustic acquisition probe, its structure is optimized by increasing the bottom thickness of the cavity inside the acoustic acquisition probe, improving its natural frequency, avoiding resonance between the acoustic acquisition probe and the water supply pipeline, and ensuring the reliability of sound signal acquisition.

Keywords: acoustic acquisition probe; modal analysis; vibration excitation; vibration mode; water supply pipeline