| 桥隧路面差异沉降车辆动力模型研究 |
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| 引用本文： | 巢万里,,王星华,张阳,郑长安.桥隧路面差异沉降车辆动力模型研究[J].湖南大学学报(自然科学版),2013,40(8):22-26. |
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| 作者姓名： | 巢万里 王星华 张阳 郑长安 |
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| 作者单位： | (1.中南大学 土木工程学院，湖南 长沙410074；2.湖南大学 土木工程学院,湖南 长沙410082；3.湖南省交通科学研究院，湖南 长沙410075) |
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| 摘 要： | 桥隧过渡段的沉降差异对车辆行驶的舒适性以及对路面的冲击作用有显著的影响.考虑车辆的纵向转动与倾覆，将车辆通过桥隧过渡段不平整路面的过程视为一定初始条件下的受迫振动，建立了车-路动力计算模型并给出了振动方程.利用拉普拉斯变换，给出了经过变换后的人的加速度以及车辆对路面作用力的表达式.并研究了两者在不同沉降差异、车辆速度以及载重下的变化规律.结果表明，沉降差异对司机的舒适度影响较大，而车辆荷载以及沉降差异对路面所受冲击作用影响较大.
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| 关 键 词： | 桥隧过渡段 沉降差异 振动方程 拉普拉斯变换 |
Study of Vehicle Dynamic Model with Bridge-tunnel Settlement Difference |
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| Institution: | (1. School of Civil Engineering, Central South Univ, Changsha, Hunan410074, China; 2. College of Civil Engineering, Hunan Univ, Changsha, Hunan410082, China; 3. Hunan Communications Research Institute, Changsha, Hunan410075, China) |
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| Abstract: | Settlement difference of tunnel-bridge section results in the bump when vehicles pass, which reduces driving comfortableness. In this study, the process of vehicle passing tunnel-bridge section was regarded as a forced oscillation with certain initial conditions. Considering vehicle rotation and overturn in longitudinal direction, a dynamic model of vehicle-road was established, and a vibration equation was given. And the driver acceleration and impact force to road with various influencing factors were solved with Laplace transform. The result shows that the acceleration and force are influenced significantly by settlement difference and vehicle load, while the vehicle speed has little effect on them. |
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| Keywords: | bridge-tunnel section settlement difference vibration equation Laplace transform |
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