| 短波随机不平顺对列车-板式无砟轨道-路基系统振动特性的影响 |
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| 引用本文： | 徐庆元,曹扬风,周小林.短波随机不平顺对列车-板式无砟轨道-路基系统振动特性的影响[J].中南大学学报(自然科学版),2011,42(4). |
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| 作者姓名： | 徐庆元 曹扬风 周小林 |
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| 作者单位： | 中南大学土木建筑学院,湖南长沙,410075 |
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| 基金项目： | 中国博士后基金，铁道部科技开发计划项目 |
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| 摘 要： | 运用弹性系统动力学总势能不变原理及形成矩阵的"对号入座"法则,建立列车-板式无砟轨道-路基竖向振动方程组,分析列车高速运行时,短波随机不平顺对列车-板式无砟轨道-路系统振动特性的影响,并对不同种类随机不平顺对列车-板式无砟轨道-路基系统动力特性的影响进行对比研究.研究结果表明:短波随机不平顺对车体垂向加速度、路基竖向压应力影响很小,对扣件竖向压应力、轨道板及底座板弯曲应力有一定的影响,对轮轨垂向力、钢轨振动加速度、轨道板振动加速度、底座板振动加速度和CA砂浆压应力则有显著的影响,影响超过中长波随机不平顺.研究车体及路基动力特性时可以不考虑短波随机不平顺,研究无砟轨道各部件动力特性时,则应考虑短波随机不平顺.
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| 关 键 词： | 板式无砟轨道 铁道工程 短波随机不平顺 动力特性 有限元 |
Influence of short-wave random irregularity on vibration characteristic of train-slab track-subgrade system |
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| XU Qing-yuan,CAO Yang-feng,ZHOU Xiao-lin.Influence of short-wave random irregularity on vibration characteristic of train-slab track-subgrade system[J].Journal of Central South University:Science and Technology,2011,42(4). |
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| Authors: | XU Qing-yuan CAO Yang-feng ZHOU Xiao-lin |
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| Institution: | XU Qing-yuan,CAO Yang-feng,ZHOU Xiao-lin (School of Civil and Architectural Engineering,Central South University,Changsha 410075,China) |
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| Abstract: | A rail-slab track-subgrade vertical vibration model was put forward based on finite element method,vibration equations were formulated by using the principle of total potential energy with stationary value in elastic system dynamics and the set-in-right-position rule for formulating matrixes.Using high-speed train passing slab track on subgrade as example,influence of short-wave random irregularity on vertical vibration responses of train-slab track-subgrade system was studied,and vertical vibration respons... |
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| Keywords: | slab track railway engineering short-wave random irregularity dynamic characteristic finite element method |
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