复合材料腕臂定位装置结构仿真和试验研究

Structural Simulation and Test Research of Composite Cantilever and Positioning Device

研究目的:目前国内电气化铁路的运营里程已超过15万公里,接触网作为电气化铁路中列车的动力之源,其运营维护工作非常繁重,其中腕臂定位装置更是接触网维护的核心重点,因此减少接触网腕臂定位装置的零部件数量和紧固件数量,同时提高装备可靠性,降低运营维护工作量成为了未来接触网的重要发展方向。研究结论:(1)本文提出了一体成型复合材料腕臂及定位装置和配套新型承力索座的设计方案,相对于既有金属腕臂及定位装置,一体成型复合材料腕臂及定位装置在零部件数量、紧固件数量、技术性能等方面均更具优势,可大幅度减少运营维护工作量;(2)通过仿真计算发现,复合材料腕臂定位装置和新型承力索座的结构最大应力、最大位移与绝缘性能均满足实际工况需要,且有相当大的余量;通过试验测试发现,复合材料腕臂定位装置和新型承力索座的机械性能、电气性能和耐老化性能均满足标准规范要求;(3)本研究成果可应用于电气化铁路接触网专业相关领域。

Research purposes:At present,the operating mileage of Chinese domestic electrified railway has exceeded 150,000 kilometers.Catenary,as the power source of trains for electrified railway,has a heavy operation and maintenance workload,and the wrist arm positioning device is the core focus of catenary maintenance.Therefore,the number of parts and fasteners of catenary positioning device should be reduced to improve the reliability of the equipment.Reducing operation and maintenance workload has become an important development direction of catenary in the future.Research conclusions:(1)A design scheme of the integrally formed composite cantilever and positioning device,and a new type of messenger wire support were proposed.Compared with the existing metal cantilever and positioning device,the integrally formed composite material cantilever and positioning device has advantages in terms of the number of parts,fasteners,technical performance,and greatly reduces the workload of operation and maintenance.(2)Through the simulation calculation,it was found that the maximum stress,maximum displacement and insulating property of the composite cantilever and positioning device structure and the new messenger wire support,meet the needs of the actual working conditions with a considerable margin.Through the experimental test,it was found that the mechanical properties,electrical properties and aging resistance of the composite cantilever and positioning device structure and the new messenger wire support all meet the requirements of standard specifications.(3)The research results are applicable to the professional field of electrified railway overhead contact system.