铁道工程学报
鐵道工程學報
철도공정학보
Journal of Railway Engineering Society
2015年
9期
60-66
,共7页
铁路桥梁%共振控制%车桥耦合%加固%车速
鐵路橋樑%共振控製%車橋耦閤%加固%車速
철로교량%공진공제%차교우합%가고%차속
railway bridge%resonance control%vehicle -bridge interaction%strengthen%speed of train
研究目的：由于加固前后铁路简支桥梁自振频率发生变化，车桥系统发生共振时对应的列车速度发生改变，因此需要分析加固前后桥梁的共振响应是否满足要求。本文介绍车桥系统发生共振的原理，研究影响车桥系统共振响应的因素，采用 ANSYS 软件和多体动力学软件 UM（Universal Mechanism）分析加固前后桥梁仿真模型的车桥耦合动力性能。研究结论：（1）对于小跨径直线桥梁，加固前后桥梁发生共振时对应的列车速度发生明显改变；（2）通过桥梁加固，其发生竖向共振时列车速度已经超出高速列车的速度范围；（3）列车第二共振速度时桥梁的竖向振幅和加速度远小于列车处于第一共振速度时，故可以不考虑；（4）对桥梁进行加固，能够明显减小共振时桥梁竖向及横向的跨中振幅和跨中加速度；（5）本研究成果可为简支铁路桥梁的共振控制提供借鉴。
研究目的：由于加固前後鐵路簡支橋樑自振頻率髮生變化，車橋繫統髮生共振時對應的列車速度髮生改變，因此需要分析加固前後橋樑的共振響應是否滿足要求。本文介紹車橋繫統髮生共振的原理，研究影響車橋繫統共振響應的因素，採用 ANSYS 軟件和多體動力學軟件 UM（Universal Mechanism）分析加固前後橋樑倣真模型的車橋耦閤動力性能。研究結論：（1）對于小跨徑直線橋樑，加固前後橋樑髮生共振時對應的列車速度髮生明顯改變；（2）通過橋樑加固，其髮生豎嚮共振時列車速度已經超齣高速列車的速度範圍；（3）列車第二共振速度時橋樑的豎嚮振幅和加速度遠小于列車處于第一共振速度時，故可以不攷慮；（4）對橋樑進行加固，能夠明顯減小共振時橋樑豎嚮及橫嚮的跨中振幅和跨中加速度；（5）本研究成果可為簡支鐵路橋樑的共振控製提供藉鑒。
연구목적：유우가고전후철로간지교량자진빈솔발생변화，차교계통발생공진시대응적열차속도발생개변，인차수요분석가고전후교량적공진향응시부만족요구。본문개소차교계통발생공진적원리，연구영향차교계통공진향응적인소，채용 ANSYS 연건화다체동역학연건 UM（Universal Mechanism）분석가고전후교량방진모형적차교우합동력성능。연구결론：（1）대우소과경직선교량，가고전후교량발생공진시대응적열차속도발생명현개변；（2）통과교량가고，기발생수향공진시열차속도이경초출고속열차적속도범위；（3）열차제이공진속도시교량적수향진폭화가속도원소우열차처우제일공진속도시，고가이불고필；（4）대교량진행가고，능구명현감소공진시교량수향급횡향적과중진폭화과중가속도；（5）본연구성과가위간지철로교량적공진공제제공차감。
Research purposes:According to the change of natural frequency of the simply -supported railway bridge before and after strengthening,the resonance speed of train is changed.So it is necessary to analyze the resonance response whether meet the requirements when the bridge is strengthened.In this paper,the resonance mechanism about vehicle -bridge system is introduced,the influence factors of resonance response about vehicle -bridge system are studied,and the dynamic interaction between train and bridge before and after strengthening is analyzed through ANSYS and multi -body dynamics software UM. Research conclusions:(1 )Results of the vehicle -bridge simulation calculation indicate that the resonance speed is changed before and after strengthening of the straight small span bridge.(2)The resonance speed outstrips the normal speed range of high speed train after strengthening of bridge.(3)The vertical amplitude and acceleration of bridge when the train on second resonance speed is much lower than that of the first resonance speed,so it can be ignored.(4)The amplitude and acceleration can be reduced obviously when vertical and transverse bridge resonance occurs according to the strengthening of bridge.(5)The research methods and results can provide references for the resonance control of the simply -supported railway bridges.
