面向工程教育认证的振动筛大梁裂纹故障诊断虚拟仿真实验设计  

Virtual simulation experiment design of fault diagnosis for cracks in the vibration screen beam for engineering education certification

作　　者：窦东阳[1] 李昌 王启立[1] 彭耀丽[1] 陈昌贺 DOU Dongyang;LI Chang;WANG Qili;PENG Yaoli;CHEN Changhe(School of Chemical Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《实验技术与管理》2024年第7期128-133,共6页Experimental Technology and Management

基　　金：江苏省高等教育教改研究重中之重课题(2023JSJG027);江苏省高等教育教改研究重点课题(2023JSJG063)。

摘　　要：为培养本科生创新思维和工程实践能力,达到工程教育认证中“具备解决复杂工程问题”的毕业要求,推动虚拟仿真实验教学改革和实验设备数字化,设计了基于ABAQUS和MATLAB的振动筛大梁裂纹故障诊断仿真实验系统,并通过产学研融合与现场效果进行了验证。该仿真实验系统采用ABAQUS有限元软件建立大梁裂纹模型,研究大梁的振动规律并模拟振动信号,同时在某选煤厂奥瑞AHS3661矸石筛大梁上安装加速度传感器采集振幅信号。通过对实测与仿真信号的振幅峰值和奇异谱熵进行时域波形分析和对比,这两个指标可被用于现场大梁的故障监测。最后借助于MATLAB开发通俗易懂的人机界面,调用底层仿真逻辑,完成相关实验操作流程。该系统能够满足过程控制相关专业的实验教学任务与创新拓展训练,取得了较好的应用效果。[Objective]The objectives are as follows:1)to cultivate innovative thinking and engineering practice abilities among undergraduates,2)meet the graduation requirements of“having the ability to solve complex engineering problems”in engineering education certification,and 3)promote the reformation of virtual simulation experiment teaching and digitization of experimental equipment.[Methods]A“vibrating screen girder”crack fault diagnosis simulation experimental system,based on ABAQUS and MATLAB,was designed through the collaboration of industry,academia,and research and verified via on-site results.The simulation experiment system uses the finite element software ABAQUS to establish a vibrating screen girder model,study the vibration rules of the faulty girder,simulate the vibration signal of the faulty girder,and compare it with real cases to verify its effectiveness.Simultaneously,an acceleration sensor is installed on the Auri AHS3661 gangue screen beam in a coal preparation plant to collect amplitude signals under normal conditions.The measured signal and simulated signal are analyzed and compared in the time domain using the peak value and singular spectral entropy(indicating the complexity of the vibration waveform)in the MATLAB interface.Both these indicators can be used for on-site beam fault monitoring.Finally,MATLAB is used to develop an easily understandable human-machine interface,call the underlying simulation logic,and complete the relevant experimental operation processes.[Results]The experimental results show that the maximum displacement for forced vibration simulation of the beam reaches 9.95 mm without cracks and that the singular spectrum entropy value is 2.103;these values are consistent with the maximum amplitude of 9.28 mm and the entropy value of 2.119 measured on-site,respectively,confirming the model’s effectiveness.We use the model to set various degrees of cracks at different positions of the girder.First,steel plates with a 5 mm nonpenetrating crack and a 10-mm penetrating crack

关 键 词：工程教育认证 故障诊断 实验系统 教学改革 

分 类 号：TD452[矿业工程—矿山机电] G642.0[文化科学—高等教育学]