基于路面不平整度的车辆振动响应分析方法

宋一凡; 陈榕峰

基于路面不平整度的车辆振动响应分析方法

宋一凡^1,,
陈榕峰^{1, 2}

1.
长安大学桥梁与隧道陕西省重点实验室, 陕西西安 710064
2.
广东省交通咨询服务中心, 广东广州 510101

基金项目:

交通部应用基础研究项目 200431981210

详细信息

作者简介:
宋一凡(1960-), 男, 江苏睢宁人, 长安大学教授, 从事桥梁抗震评估及车桥耦合振动研究

中图分类号: U461.51
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- PDF下载量: 287
- 被引次数: 0
出版历程
- 收稿日期: 2006-12-29
- 刊出日期: 2007-08-25

Analysis method of vehicle vibration response caused by pavement roughness

Song Yi-fan^1
,,
Chen Rong-feng^{1, 2}

1.
Key Laboratory for Bridge and Tunnel of Shaanxi Province, Chang' an University, Xi' an 710064, Shaanxi, China
2.
Traffic Consultation and Service Center of Guangdong Province, Guangzhou 510101, Guangdong, China

More Information

Author Bio:
Song Yi-fan (1960-), male, professor, +86-29-82334837, songyfan@126.com

摘要

摘要: 为了分析路面与车辆的相互作用, 提出了四自由度1/2车辆模型相对于不平整路面耦合振动分析方法。根据GB/T7031-1986建议的公路路面功率谱密度的拟合表达式, 在分析了运行汽车固有振动频率和行驶速度的影响后, 获得分布在一定频率范围内的离散功率谱密度数据, 利用离散傅立叶逆变换得到路面不平度值, 并以此作为1/2车辆垂向动力学模型的输入激励, 通过数值仿真得到运行车辆系统在不同路面不平整度下的时域响应。分析结果表明: 车辆动荷载系数随车速增大呈线性增加, 随路面等级变差呈非线性增大, 路面等级是影响车辆动力作用的最显著因素。
- 汽车工程 /
- 车辆振动响应 /
- 傅立叶逆变换 /
- 路面不平整度 /
- 动荷载系数
Abstract: In order to analyze the interaction of pavement and vehicle, an analysis method of couple vibration between 1/2-four-degree vehicle model and rough pavement was proposed.According to the power spectral density function advised by GB/T 7031-1986, the effect of the vehicle natural vibration frequency and velocity was studied, the discrete data of power spectral density within definite frequency range were obtained, the value of pavement roughness was obtained by Fourier reverse transform. The samples were taken as the input disturbances of a 1/2 vehicle vertical dynamics model, and the time-domain response of vehicle system caused by pavement roughness was obtained by numerical simulation. Analysis result shows that the value of dynamic load coefficient increases linearly along with the increase of vehicle velocity, but non-linearly along with the grade increase of pavement roughness, and the grade of pavement roughness is most marked factor of vehicle dynamic effect.
- automobile engineering /
- vehicle vibration response /
- Fourier reverse transform /
- pavement roughness /
- dynamic load coefficient

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图 1 A、C和E级路面的不平度曲线

Figure 1. Roughness curves of grade A, C and E pavements

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图 2 1/2车辆振动模型

Figure 2. 1/2 vehicle vibration model

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图 3 车辆振动位移曲线

Figure 3. Vibration displacement curves of vehicle

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图 4 车辆振动速度曲线

Figure 4. Vibration speed curves of vehicle

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图 5 车速与动荷载系数的关系

Figure 5. Relationship between vehicle velocity and D

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图 6 路面不平整度与动荷载系数的关系

Figure 6. Relationship between pavement roughness and D

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表 1 路面不平度系数

Table 1. Coefficients of pavement roughness

路面等级	路面不平度系数/[10^-6m²·(m^-1)^-1]
路面等级	下限	几何平均值	上限
A	8	16	32
B	32	64	128
C	128	256	512
D	512	1 024	2 048
E	2 048	4 096	8 192
F	8 192	16 384	32 768
G	32 768	65 536	131 072
H	131 072	262 144	524 288

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