| 单侧轨道不平顺数值模拟 |
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| 引用本文： | 丁军君,李芾.单侧轨道不平顺数值模拟[J].交通运输工程学报,2010(1). |
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| 作者姓名： | 丁军君 李芾 |
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| 作者单位： | 西南交通大学机械工程学院; |
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| 基金项目： | “十一五”国家科技支撑计划项目(2007BAG05B06) |
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| 摘 要： | 采用傅立叶逆变换将轨道不平顺功率谱密度转换为时域不平顺序列,分析了美国轨道中心线各种不平顺的相关性。利用轨道中心线不平顺与左右轨道不平顺的关系,将中心线轨道不平顺等效转换为左右轨道的垂向和横向不平顺,通过车辆动力学仿真计算了轮轨作用力响应,并比较了美国五级谱单侧不平顺与中国干线谱不平顺。比较结果表明:各种中心线不平顺之间相关系数均小于0.3,为微弱相关,可视为统计独立的;中心线轨道不平顺响应与等效后的左右轨道不平顺响应的相关系数均大于0.8,为高度相关,验证了等效转换的正确性;美国五级谱单侧不平顺功率谱密度在低频部分高于中国干线谱,在高频部分则低于中国干线谱。
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| 关 键 词： | 铁道工程 单侧轨道不平顺 数值模拟 相关系数 功率谱密度 |
Numerical simulation of one side rail irregularity |
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| DING Jun-jun,LI Fu.Numerical simulation of one side rail irregularity[J].Journal of Traffic and Transportation Engineering,2010(1). |
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| Authors: | DING Jun-jun LI Fu |
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| Institution: | School of Mechanical Engineering/a>;Southwest Jiaotong University/a>;Chengdu 610031/a>;Sichuan/a>;China |
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| Abstract: | The power spectrum density of track irregularity was transformed to time-domain irregularity by inverse Fourier transform,and the correlation of various irregularities of America center line was analyzed.The relation between center line and left/right rail irregularities was used to transform the center line irregularity to the irregularities of left and right rails,and the rail/wheel interaction force response was computed by the simulation of vehicle system dynamics.The one side irregularities of America ... |
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| Keywords: | railway engineering one side track irregularity numerical simulation correlation coefficient power spectrum density |
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