摘要
基于有限元软件MSC-Marc建立弓网系统模型,对在随机风场中的受电弓-接触网动态性能进行仿真研究。模型中采用欧拉-伯努利梁模型模拟接触线和承力索,受电弓和接触网模型之间通过接触实现耦合,使弓网作为一个整体进行动态仿真;采用适合接触网随机风场计算的沿高度不变的Davenport谱,运用谐波合成法数值模拟风场。在此基础上,采用MSC-Marc软件完成弓网系统在不同随机风荷载作用下的动态性能分析。实验结果表明:模拟随机风的功率谱函数与目标谱结果非常吻合,随机风场对接触网风振响应及弓网间的动态性能影响很大,且沿风向定位器的第一吊弦退出工作时间随风速增大而增长。通过仿真结果比较分析,为进一步研究随机风场下弓网系统结构参数配合奠定了基础。
A novel finite element method for simulation of dynamic behaviour of the pantograph-catenary system in stochastic wind fields was presented.On the basis of the MSC-Marc simulation platform,the FEM model of the pantograph-catenary system was established and the interactions between pantograph and catenary system were simulated as a whole,in which contact wires and carrier cables were modeled by using the Euler-Bernoulli flexible beam and their compling with pantogrephs was realized through contacts.The simulation model adopted the Davenport power spectrum density which was unchangeable with height and the stochastic wind fields were numerically simulated with the harmonic wave superimposing method.Dynamic interaction performance of the pantograph-catenary system was analyzed by Software MSC-Marc under different stochastic wind loads.The test results demonstrate as follows：The power spectrum density functions are in good agreement with the expected targets;the stochastic wind field has great influence on wind-induced responses of the catenary system and on dynamic interactions between pantograph and catenary system,and the time that the droppers of the localizer become invalid along the wind direction prolongs with wind speed increasing.Good basis is laid for further study on matching of parameters of contact wires and different pantographs in stochastic wind fields.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2012年第10期36-42,共7页
Journal of the China Railway Society
基金
国家自然科学基金(51007074
U1134205)
教育部新世纪优秀人才支持计划项目(NECT-08-0825)
铁道部科技研究开发计划(2011J016-B)
中央高校基本科研业务费专项资金(SWJTU11CX141)
关键词
弓网系统
随机风场
动态受流性能
有限元
pantograph-catenary system
stochastic wind field
dynamic current-collecting performance
FEM
