Finite Element Model for Catenary in Initial Equilibrium State
-
摘要: 为准确和快速地计算接触网初始平衡状态的吊弦长度、静态刚度、固有频率和模态振型,分别用索单元和梁单元建立了接触网有限元模型.结果表明:单元类型的选择对接触网静态和动态的结果影响可忽略不计;索单元的自由度数目少,可提高计算效率;计算静态刚度和模态振型时,需先确定接触网平衡位置且考虑单元轴向刚度.Abstract: Finite element models were established using link and beam elements,respectively,to accurately and quickly calculate the dropper lengths,static stiffness,natural frequencies and mode shapes of catenaries in the initial equilibrium state.The results show that the two element types exert no obvious effect on the static and dynamic simulation results;the calculation efficiency can be improved using the link elements due to their fewer freedom degrees;the equilibrium positions and the axial stiffness of the elements should be determined in advance when the static stiffness and mode shapes are calculated.
-
Key words:
- catenary /
- finite element /
- initial equilibrium /
- link element /
- beam element
-
LOPEZ G O,CARNICERO A,MARONO J L.Influence of stiffness and contact modeling on catenary-pantograph system dynamics[J].Joural of Sound and Vibration,2007,299(4-5):806-821.[2] ALBERTO A,BENET J,ARIAS E,et al.A high performance tool for the simulation of the dynamic pantograph-catenary interaction[J].Mathematics and Computers in Simulation,2008,79(3):652-667.[3] PARK T J,HANB C S,JANGC J H.Dynamic sensitivity analysis for the pantograph of a high-speed rail vehicle[J].Journal of Sound and Vibration,2003,266(2):235-260.[4] WU T X,BRENNAN M J.Basic analytical study of pantograph catenary system dynamics[J].Vehicle System Dynamics,1998,30(6):443-456.[5] WU T X,BRENNAN M J.Dynamic stiffness of a railway overhead wire system and its effect on pantograph-catenary system dynamics[J].Journal of Sound and Vibration,1999,219(3):483-502.[6] 张卫华,沈志云.接触网动态研究[J].铁道学报,1991,13(4):26-33.ZHANG Weihua,SHEN Zhiyun.Dynamic studies on catenary[J].Journal of the China Railway Society,1991,13(4):26-33.[7] COLLINA A B.Numerical simulation of pantograph-overhead equipment interaction[J].Vehicle System Dynamics,2002,38(4):261-291.[8] 张卫华.准高速接触网动态性能的研究[J].西南交通大学学报,1997,32(2):187-192.ZHANG Weihua.On dynamic behavior of the quasi-high-speed catenary[J].Journal of Southwest Jiaotong University,1997,32(2):187-192.[9] 吴天行.接触网的有限元计算与分析[J].铁道学报,1996,18(3):44-48.WU Tianxing.Analysis and calculation of catenary by FEM[J].Journal of the China Railway Society,1996,18(3):44-48.[10] LOPEZ G O,CARNICEROA A,TORRESB V.Computation of the initial equilibrium of railway overheads based on the catenary equation[J].Engineering Structures,2006,28(10):1387-1394.[11] 凌道盛,徐兴.非线性有限元及程序[M].浙江:浙江大学出版社,2004.
点击查看大图
计量
- 文章访问数: 1648
- HTML全文浏览量: 75
- PDF下载量: 518
- 被引次数: 0