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| 基于虚拟激励法的轨道车辆垂向振动响应分析 | |
| 引用本文： | 孟建军,杨泽青,蒲光华,胥如迅.基于虚拟激励法的轨道车辆垂向振动响应分析[J].中国铁道科学,2012,33(2):89-94. |
| 作者姓名： | 孟建军 杨泽青 蒲光华 胥如迅 |
| 作者单位： | 1. 兰州交通大学机电工程学院,甘肃兰州730070;甘肃省轨道交通装备系统动力学与可靠性重点实验室,甘肃兰州730070 2. 河北工业大学机械工程学院,天津,300130 3. 兰州交通大学机电工程学院,甘肃兰州,730070 |
| 基金项目： | 教育部春晖计划项目(Z2006-1-62003) |
| 摘 要： | 针对传统的随机振动分析方法计算复杂、计算量大的问题,提出采用虚拟激励法求解轨道车辆的垂向振动响应,建立某型车辆的垂向动力学模型,求解车辆的垂向振动响应并验证模型的正确性.与传统求解方法的计算结果比较表明,虚拟激励法适合于求解车辆的垂向振动响应,并且计算简单.在频域内对车辆垂向振动响应的分析表明:随着车辆运行速度的提高,车体、前后转向架以及一位轮对的垂向加速度的功率谱密度和振动主频均增大,轮对的垂向振动经一系悬挂传到转向架,再经二系悬挂传到车体,其振动频率f降低,振动幅值迅速减小,传到车体上时振动已变得很弱；f＞5Hz时,车体、前后转向架和一位轮对垂向加速度的功率谱密度均随着一系阻尼器两端橡胶节点刚度与一系弹簧刚度比值的增大而增加,尤其是车体和前后转向架的垂向加速度的功率谱密度变化更为明显,因此降低橡胶节点的刚度有利于提高车辆运行的平稳性. |
| 关 键 词： | 虚拟激励法 轨道车辆 垂向振动 轨道高低不平顺 随机振动 功率谱密度 |
Vertical Vibration Response Analysis of Railway Vehicle Based on Pseudo Excitation Method |
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| MENG Jianjun , YANG Zeqing , PU Guanghua , XU Ruxun.Vertical Vibration Response Analysis of Railway Vehicle Based on Pseudo Excitation Method[J].China Railway Science,2012,33(2):89-94. | |
| Authors: | MENG Jianjun YANG Zeqing PU Guanghua XU Ruxun |
| Institution: | 1(1.School of Mechatronic Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070,China; 2.Key Laboratory of System Dynamics and Reliability of Rail Transport Equipment of Gansu Province,Lanzhou Gansu 730070,China; 3.School of Mechanical Engineering,Hebei University of Technology,Tianjin 300130,China) |
| Abstract: | Since traditional random vibration analysis method features computational complexity and large calculation,pseudo excitation method is proposed to solve the vertical vibration response of railway vehicle.The vertical dynamic model of certain type of vehicle was constructed to solve the vertical vibration response of railway vehicle and the correctness of the model was validated.The calculated results of both methods were compared and analyzed.It shows that pseudo excitation method is more suitable for solving the vertical vibration response of railway vehicle and also with simple calculation.The analysis results of vehicle vertical vibration response in frequency domain shows that the vertical acceleration PSDs and vibration main frequencies of the car body,the front and rear bogies and the first position wheelset are increased with the increase of vehicle running speed.The vibration frequency f and amplitude are rapidly weakened as the vertical vibration of the wheelset passes through primary suspension to bogie,and then passes through secondary suspension to the car body.At the moment,the vibration becomes extremely weak.When f>5 Hz,the vertical acceleration PSDs of the car body,the front and rear bogies and first position wheelset are increased with increase of the ratio between the stiffness of the rubber nodes at both ends of the primary damper and the stiffness of the primary spring.Especially,the changes in vertical acceleration PSDs of the car body,the front and rear bogies are more obvious.Therefore,reducing the stiffness of the rubber node helps to improve the running smoothness of vehicle. |
| Keywords: | Pseudo excitation method Railway vehicle Vertical vibration Track vertical profile irregularity Random vibration Power spectrum density |
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