基于光纤传感的港口取料机建模分析与健康监测系统

Modeling analysis and health monitoring system of port reclaimer based on optical fiber sensing

港口取料机工作条件恶劣,激励源多且激励特性复杂。为了实现取料机的精细化视情维护,提高其结构的可靠性并降低运维费用;同时,为了解决基于电阻应变计等电磁类传感器无法避免的电磁干扰、寿命短等问题,设计了基于光纤传感的港口取料机在线健康监测系统。以QL6000.55型斗轮取料机作为研究对象,对其进行有限元建模及分析,获得其模态及应力分布云图,确定应变、振动监测点位。通过现场安装试运行,验证了健康监测系统的可信性。试验结果表明,基于光纤传感的港口取料机在线健康监测系统在复杂作业条件下工作6个月,各项性能指标达到设计要求,各项功能满足生产需要。

The working conditions of the port reclaimer are harsh,with many excitation sources and complex excitation characteristics.In order to achieve refined condition-based maintenance,improve the reliability of the structure,and reduce the operation and maintenance costs of the reclaimer,as well as to solve the unavoidable electromagnetic interference and short life issues based on electromagnetic sensors such as resistance strain gauges,an online health monitoring system for the port reclaimer based on optical fiber sensing was designed.Taking QL6000.55 bucket wheel reclaimer as the research object,its finite element modeling and analysis were conducted to obtain its mode and stress distribution contours,and determine the strain and vibration monitoring points.Then,the reliability of the health mornitoring system had been verified through on-site installation and trial operation.The experimental results showed that the online health monitoring system for the port reclaimer based on optical fiber sensing had mornitoring been working under complex operating conditions for six months,with all performance indicators meeting the design requirements and all functions meeting production requirements.