底座板脱空对板式无砟轨道行车动力特性的影响
doi: 10.3969/j.issn.0258-2724.2014.06.005
Effects of Contact Loss underneath Concrete Roadbed on Dynamic Performances of Slab Track-Subgrade System
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摘要: 采用有限元动力学软件ANSYS/LS-DYNA,建立了底座板脱空条件下车辆-轨道-路基垂向耦合振动模型,以分析底座板脱空对车辆和轨道系统动力性能的影响.计算结果表明:当底座板下纵向脱空长度小于3.125 m(脱空面积10 m2)时,对车辆及轨道系统动力响应的影响较小;当底座板下纵向脱空长度超过3.125 m时,钢轨垂向位移、转向架及车体垂向加速度显著增大,可能危及行车舒适性和安全性,因此建议底座板下纵向脱空长度限值不超过3.125 m.Abstract: ANSYS/LS-DYNA, a large general finite element software, was used to establish a vertical vibration model for vehicle-track-subgrade coupling system, and the dynamic responses of a vehicle-track system caused by contact loss underneath concrete roadbed were analyzed. The research results show that contact loss length less than 3.125 m (corresponding to a contact loss area of 10 m2) has a negligible effect on the dynamic responses of a vehicle-track system. The dynamic responses of the vertical displacement of rail and vertical accelerations of bogie and car body will increase significantly when the contact loss is longer than 3.125 m, being unfavorable to the ride comfort and safety, so contact loss length underneath concrete roadbed should be less than 3.125 m.
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Key words:
- ballastless track /
- prefabricated slab track /
- concrete roadbed /
- contact loss /
- dynamic performance
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宋小林,翟婉明,王少林. 高速铁路无砟轨道基础结构垂向位移分布特性分析[J]. 土木工程学报,2012,45(5): 163-168. SONG Xiaolin, ZHAI Wanming, WANG Shaolin. Vertical displacement distributions of ballastless track infrastructure of high-speed railways[J]. China Civil Engineering Journal, 2012, 45(5): 163-168. 邹春华,周顺华,王炳龙. 有砟轨道路基不均匀沉降引起的轨枕空吊的计算方法[J]. 铁道学报,2013,35(1): 87-91. ZOU Chunhua, ZHOU Shunhua, WANG Binglong. Calculation method of unsupported sleepers caused by differential subgrade settlement of ballasted track[J]. Journal of the China Railway Society, 2013, 35(1): 87-91. 蔡成标,翟宛明,王开云. 遂渝线路基上板式轨道动力性能计算及评估分析[J]. 中国铁道科学,2006,27(4): 17-20. CAI Chengbiao, ZHAI Wanming, WANG Kaiyun. Calculation and assessment analysis of the dynamic performance for slab track on Sui-Yu railway[J]. China Railway Science, 2006, 27(4): 17-20. 蔡成标,徐鹏. 高速铁路无砟轨道关键设计参数动力学研究[J]. 西南交通大学学报,2010,45(4): 494-496. CAI Chengbiao, XU Peng. Dynamic analysis of key design parameters for ballastless track of high-speed railway[J]. Journal of Southwest Jiaotong University, 2010, 45(4): 494-496. 徐庆元,李斌,周智辉. CRTS-Ⅰ型板式无砟轨道线路路基不均匀沉降限值研究[J]. 中国铁道科学,2012,33(2): 1-4. XU Qingyuan, LI Bin, ZHOU Zhihui. Study on the limited value for the uneven settlement of subgrade under CRTS-Ⅰ type slab track[J]. China Railway Science, 2012, 33(2): 1-4. 韩义涛,姚力. 基础沉降对土路基上板式轨道动力性能影响分析[J]. 铁道工程学报,2007(10): 28-31. HAN Yitao, YAO Li. Analysis of the dynamic performance for slab track settlement on embank-ment[J]. Journal of Railway Engineering Society, 2007(10): 28-31. 王伟华. 土路基上双块式无砟轨道垂向动力特性分析[D]. 成都:西南交通大学土木工程学院,2009: 21-26. 赵坪锐. 板式无碴轨道动力学性能分析与参数研究[D]. 成都:西南交通大学土木工程学院,2003: 12-40. 翟婉明. 车辆-轨道耦合动力学[M]. 3版. 北京:科学出版社,2007: 217-220. 周毅. CRTSⅢ型板式轨道减振特性研究[D]. 成都:西南交通大学土木工程学院,2011: 23-24. 张斌,冯其波,杨婧,等. 路基沉降远程自动监测系统的研发[J]. 中国铁道科学,2012,33(1): 139-143. ZHANG Bin, FENG Qibo, YANG Jing, et al. Development of remote automatic monitoring system for subgrade settlement[J]. China Railway Science, 2012, 33(1): 139-143. 中国铁道科学研究院. TG/GW 115—2012 高速铁路无砟轨道线路维修规则(试行)[S]. 北京:中国铁道出版社,2012: 58-59. 严晓波. 无砟轨道路基结构性能均匀性控制标准的数值仿真分析. 成都:西南交通大学土木工程学院,2013: 23-34. 西南交通大学. TB 10108—2011 铁路路基填筑工程连续压实控制技术规程[S]. 北京:中国铁道出版社,2011: 60.
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