| 车辆-轨道系统垂向随机振动的辛方法分析 |
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| 引用本文： | 吕峰,林家浩,张亚辉.车辆-轨道系统垂向随机振动的辛方法分析[J].力学学报,2008,40(3):381-387. |
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| 作者姓名： | 吕峰 林家浩 张亚辉 |
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| 作者单位： | 大连理工大学工程力学系 大连理工大学工程力学系 大连理工大学工程力学系 |
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| 摘 要： | 将轨道视为无限长的周期结构，建立车辆轨道垂向耦合模型. 使用虚拟激励
法将随机的轨道不平顺激励转化为确定性的简谐激励，再用辛数学方法求解轨道结构的频率
响应特性和耦合系统的响应功率谱. 整个计算模型只有26个自由度，求解过程快速而精确.
数值算例中，将该方法与常规有限元方法进行了比较，验证了方法的高效性和正确性,
讨论了车辆速度对系统随机响应的影响.
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| 关 键 词： | 车辆 轨道 随机振动 虚拟激励法 辛数学方法 |
| 收稿时间： | 2007-09-12 |
| 修稿时间： | 2007-12-26 |
RANDOM VIBRATION ANALYSIS OF VEHICLE-TRACK COUPLING SYSTEMS USING SYMPLECTIC METHOD |
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| Lu Feng,Lin Jiahao,Zhang Yahui.RANDOM VIBRATION ANALYSIS OF VEHICLE-TRACK COUPLING SYSTEMS USING SYMPLECTIC METHOD[J].chinese journal of theoretical and applied mechanics,2008,40(3):381-387. |
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| Authors: | Lu Feng Lin Jiahao Zhang Yahui |
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| Affiliation: | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China |
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| Abstract: | The vertical coupling model of vehicle-track systems is
set up in the case of the track as an infinite periodic structure. The
random irregularity excitation of the rail is transformed into a
deterministic harmonic excitation with the pseudo excitation method, and the
frequency response of the track and the power spectrum density (PSD) of the
system response are analyzed using the symplectic algorithm. In addition,
there are only 26 DOFs in the computational model to have an efficient and
accurate solution. The model is verified with the conventional FEM, and the
influence of the vehicle velocity on the system vibration is investigated. |
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| Keywords: | vehicle track random vibration pseudo-excitation symplectic |
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