钢桶泄漏流激振动结构响应分析与实验研究  

Structure Response Analysis and Experimental Research of Drums Leakage Flow-induced Vibration

作　　者：朱志松[1] 郭东军[1] 陈阳阳[1] 

机构地区：[1]南通大学,南通226019

出　　处：《包装工程》2014年第17期33-38,共6页Packaging Engineering

摘　　要：目的为了探究钢桶泄漏产生声发射检测技术的基本原理和实验方法,建立钢桶泄漏仿真模型和实验模型。方法首先介绍钢桶气体泄漏产生声发射信号的机理和流固耦合的基本原理;其次建立钢桶泄漏模型,通过Workbench流固耦合方法模拟流激振动下结构响应特征;然后根据声发射检测原理搭建钢桶泄漏声发射检测实验平台,采集实验数据并分析处理,探讨漏孔直径、内压与钢桶泄漏各特征参数的关联,结合频域分析,得到能够表征钢桶泄漏的特征参数与特征激振频率;最后将得到的泄漏声发射信号特征与仿真结果进行比较。结果钢桶气体泄漏流激振动的激振频段为22～40 kHz,峰值频率约为25 kHz。结论钢桶泄漏的仿真模拟结果与实验检测得到的结构响应基本一致,钢桶泄漏的仿真与实验研究方法为钢桶气体泄漏在线检测技术的研究提供了依据。Objective To explore the basic principle and experimental method of acoustic emission testing technology from leakage in drums, the drums leakage model and experimental model were established. Methods First, the AE signal generating mechanism and the fluid-structure interaction basic theory from leakage of gas in drums were introduced. Then the model of drums leakage was built, the structural response characteristics under flow-induced vibration was simulated using fluid-solid coupling method with Workbench. According to the principle of acoustic emission detection, the experimental platform of drums leakage was built, the experimental data was collected and analyzed. Correlation between characteristic parameter and internal pressure or leak diameter was discussed, and the waveform of frequency domain was analyzed, so as to obtain characteristic parameters and characteristics of vibration frequency which can be to characterize the leakage of drums. Finally, the leakage acoustic emission signal characteristics was compared with the results of simulation. Results The results showed that the exciting frequency of flow-induced vibration from leakage of gas in drums was 22--40 kHz, and the peak frequency was 25 kHz. Conclusion The structural response result of simulation and experimental detection of drums leakage were basically consistent. The simulation and experimental research methods of drums leakage provide a theoretical basis for researching online test for leakage of gas from drums.

关 键 词：钢桶泄漏 流固耦合 声发射 结构响应 

分 类 号：TB485.3[一般工业技术—包装工程]