应用复合减振器的梯形轨枕提高轨道的减振效果
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摘要
为了分析使用金属橡胶-碟簧复合减振器的梯形轨枕轨道对地表及建筑物的减振效果以及地表振动传播规律,将地铁对沿线的振动影响问题简化成平面应变问题,利用ABAQUS有限元软件建立建筑物—地铁隧道—土层二维有限元模型。把仿真计算得到的道床加速度作为模型激励,研究使用复合减振器与普通线性减振垫的梯形轨枕轨道,对环境的振动影响差异,对复合减振器的减振效果做出评价。研究使用复合减振器的梯形轨枕轨道引起的地表振动传播规律。结果表明,相对于线性减振垫,金属橡胶—碟簧复合减振器可以提升减振效果,具有替换减振垫的可行性;得出地铁列车作用下的地表振动特性,并与文献结论做比较,证明模型的合理性。
In order to study the anti-vibration effects of the trapezoidal-sleeper track on the foundation of metal-rubber disc-spring isolators, the problem of environment vibration around the subway was simplified as a plane strain problem. The anti-vibration effects of the track to the environment and the vibration propagation law on the ground were researched. A two-dimensional model of building-tunnel-ground was established with ABAQUS finite element software. The acceleration data of the track bed obtained in the numerical simulation were applied to the model as an excitation. The difference between the influences of the composite isolator and the ordinary linear damping pad on the anti-vibration performance was studied.The anti-vibration effect of the composite isolator was evaluated and the rule of the ground vibration was studied. The results show that the metal-rubber disc-spring isolator can improve the anti-vibration effect of the track and replace the linear damping pad. The rule of the ground vibration caused by the subway train was researched and the rationality of the model was proved.
In order to study the anti-vibration effects of the trapezoidal-sleeper track on the foundation of metal-rubber disc-spring isolators, the problem of environment vibration around the subway was simplified as a plane strain problem. The anti-vibration effects of the track to the environment and the vibration propagation law on the ground were researched. A two-dimensional model of building-tunnel-ground was established with ABAQUS finite element software. The acceleration data of the track bed obtained in the numerical simulation were applied to the model as an excitation. The difference between the influences of the composite isolator and the ordinary linear damping pad on the anti-vibration performance was studied.The anti-vibration effect of the composite isolator was evaluated and the rule of the ground vibration was studied. The results show that the metal-rubber disc-spring isolator can improve the anti-vibration effect of the track and replace the linear damping pad. The rule of the ground vibration caused by the subway train was researched and the rationality of the model was proved.
引文
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[3]李小妮.大瑞铁路梯形轨枕无砟轨道设计研究[D].成都:西南交通大学,2010.
[4]苏宇,刘维宁,孙晓静,等.梯形轨道减振性能研究[J].铁道标准设计,2007,10:71-74.
[5]邓玉姝,夏禾.城市轨道交通梯形轨枕轨道高架桥梁试验研究[J].2011,28(3):49-54.
[6]Hajime Wakui,Hiroyuki Okuda,Kiyoshi Asanuma.Dynamic load,resistance and environmental performance of floating ladder track[J].Q.R.of RTRI,2004,45(3):149-155.
[7]王辉.地铁隧道内梯子式轨道的减振特性研究[D].北京:北京交通大学,2011.
[8]王尤颜,白鸿柏,刘远方.金属橡胶材料压缩性能的细观特征研究[J].机械科学与技术,2011,30(3):404-407.
[9]刘建达,苏晓梅,陈国兴,等.地铁运行引起的地面振动分析[J].自然灾害学报,2007,16(5):148-154.
[10]周亮.城市轨道交通引起的振动测试分析及数值模拟[D].上海:同济大学,2007.
[11]栗润德.地铁列车引起的地面振动及隔振措施研究[D].北京:北京交通大学,2008.
[12]孙晓静.地铁列车振动对环境影响的预测研究及减振措施分析[D].北京:北京交通大学,2008.
[13]王汉民.城市轨道交通浮置板轨道振动特性研究及对邻近建筑物的影响[D].北京:北京交通大学,2009.
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