重型汽车与曲线桥相互作用及非线性动力学研究

项目名称： 重型汽车与曲线桥相互作用及非线性动力学研究

项目编号： No.11472180

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 李韶华

作者单位： 石家庄铁道大学

项目金额： 88万元

中文摘要： 随着各国经济的快速发展和物流数量的增加，公路交通正向高速和重型化发展。重型汽车通过曲线桥时易产生甩尾、侧翻等失稳现象,并对路面和桥梁产生动力冲击作用，使路面或桥梁构件出现疲劳、老化、开裂等问题，诱发交通事故。本项目拟针对重型汽车、驾驶员与曲线桥建模，利用理论及数值方法研究重型汽车通过曲线桥时的非线性动力学行为及集成控制，分析系统参数与车桥耦合振动对车辆稳定性、桥梁安全性及汽车控制策略的影响。这属于高维、时滞、刚柔耦合、非线性系统动力学问题，具有重要的科学意义。研究成果有助于改进车辆和曲线桥动态设计、完善桥梁安全性设计规范，对保证交通安全及降低养护管理成本具有重要的工程应用价值。

中文关键词： 重型汽车；曲线桥；非线性动力学；振动控制；相互作用

英文摘要： With the rapid development of economy and goods transport in many countries, high speed and heavy load have become the trend of road traffic development. When passing through curved bridges, heavy vehicles are easy to drift or rollover and also have a dynamic impact on pavement and bridge. As a result, the road or bridge structures will create fatigue, aging, cracking and other problems, which may lead to the traffic accidents. In this project, the models of heavy vehicles, drivers and curved bridges will be built, and the nonlinear dynamics and integrated control of vehicles when passing through curved bridges will be researched by theoritical and numerical methods. The effects of system parameters and vehicle-bridge coupled vibration on vehicle stability, bridge safety and vehicle control strategy will be analyzed. This investigation involves nonlinear dynamics of the high-dimensional, time-delay, rigid-flexible coupling system and has an important science significance. The research results will be beneficial to improving dynamical design of vehicles and curved bridges and mending bridge safety design criterion, which will bring about a great engineering application value for reducing maintaince and management cost.

英文关键词： Heavy-duty vehicle;curved bridge;nonlinear dynamics;vibration control;interaction