路面随机不平度下车辆对路面的动载特性

吕彭民; 尤晋闽; 和丽梅

路面随机不平度下车辆对路面的动载特性

吕彭民^1,,
尤晋闽^{1, 2},
和丽梅¹

1.
长安大学道路施工技术与装备教育部重点实验室陕西西安 710064
2.
西安交通大学机械工程学院陕西西安 710049

基金项目:

国家西部交通建设科技项目 2005 318 812 12

详细信息

作者简介:
吕彭民(1957-), 男, 陕西渭南人, 长安大学教授, 从事车辆与路面动力学研究

中图分类号: U416.51
计量
- 文章访问数: 293
- HTML全文浏览量: 100
- PDF下载量: 649
- 被引次数: 0
出版历程
- 收稿日期: 2007-06-12
- 刊出日期: 2007-12-25

Vehicle dynamic load property resulted from road random roughness

1.
Key Laboratory of Highway Construction Technology and Equipment of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China
2.
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

More Information

Author Bio:
Lu Peng-min(1957-), male, professor, + 86-29-82334322, lpmin@chd.edu.cn

摘要

摘要: 采用快速傅立叶逆变换法对路面随机不平度进行时域模拟, 建立二分之一车辆动力学模型, 应用龙格-库塔法分析了路面等级、车速、载质量和车辆参数对路面动载荷的影响, 研究了车辆产生的动载荷规律。仿真结果表明: 车辆动载随着路面不平度的增大而明显增大; 车辆动载和动载系数随着车速的提高而增大, 且在固有频率附近会出现峰值; 载质量的增加虽导致动载系数降低, 但动载增大, 故应严格限制超载现象; 增大轮胎刚度和减小悬架阻尼都会引起车辆动载与动载系数的增大, 因此, 应限制高压轮胎的使用和选择合理的车辆阻尼参数。
- 路面工程 /
- 动载 /
- 路面不平度 /
- 数值仿真
Abstract: Road random roughness was simulated by using inverse fast Fourier transform(IFFT) in time domain, a half-vehicle dynamics model was established, the effects of road grade, vehicle velocity, loading capacity and vehicle parameters on vehicle dynamic load were studied by Runge-Kutta method, and the rules of vehicle dynamic load caused by road roughness were studied.Simulation result indicates that vehicle dynamic load increases obviously with the intensification of road roughness; vehicle dynamic load and the dynamic load coefficient increase with the increase of vehicle speed, their peak values appear nearby inherent frequency; dynamic load coefficient decreases and vehicle dynamic load increases with the increase of loading capacity, so overload phenomena is strictly limited; increasing tire stiffness and decreasing suspension damping can lead to the increase of vehicle dynamic load and dynamic load coefficient, so the use of high pressure tire should be limited and the selection of suspension damping should be reasonable.
- pavement engineering /
- dynamic load /
- road roughness /
- numerical simulation

HTML全文

图 1 路面随机不平度

Figure 1. Road random roughness

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图 2 振动模型

Figure 2. Vibration model

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图 3 载与路面等级关系

Figure 3. Relationship between dynamic load and road grade

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图 4 载系数与路面等级关系

Figure 4. Relationship between dynamic load coefficient and road grade

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图 5 载与车速关系

Figure 5. Relationship between dynamic dynamic load and vehicle speed

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图 6 动载系数与车速关系

Figure 6. Relationship between load coefficient and vehicle speed

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图 7 动载与载质量关系

Figure 7. Relationship between dynamic load and loading capacity

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图 8 动载系数与载质量关系

Figure 8. Relationship between dynamic load coefficient and loading capacity

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图 9 载与轮胎刚度关系

Figure 9. Relationship between dynamic load and tire stiffness

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图 10 载系数与轮胎刚度关系

Figure 10. Relationship between dynamic load coefficient 8nd tire stiffness

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图 11 动载与阻尼关系

Figure 11. Relationship between dynamic load and damping

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图 12 动载系数与阻尼关系

Figure 12. Relationship between dynamic load coefficient and damping

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参考文献(9)

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