作　　者： ; ; ; (葛惠娟）;

机构地区： 北京工业大学建筑工程学院工程抗震与结构诊治北京市重点实验室

出　　处： 《公路交通科技》 2009年第4期13-17,共5页

摘　　要： 为了将实测得到的国际平整度指数IRI值引入到路面不平度模拟中,从而在车-路或车-桥相互作用的耦合体系中更准确地模拟由路面不平度引起的车辆动荷载,提出了一种通过实测IRI值得到该段路路面不平度的方法。由IRI的计算方法入手,通过建立1/4车模型来分析路面不平度的输入和车辆、地面的振动响应,并通过路面不平度标准差与IRI的关系等式作为中介,将IRI引入到路面不平度的模拟中,采用周期图表法,利用功率谱密度函数和傅立叶逆变换,进一步模拟出路面不平度。最后进行了实例模拟,通过程序分析,验证了该方法的有效性。 In order to introduce the International Roughness Index(IRI)obtained by in-site test to simulate the road roughness and then simulate the vehicle dynamic load and dynamic response of pavement caused by road roughness in the vehicle-road or vehicle-bridge interaction system more precisely,a new mathematical method of road roughness was proposed based on IRI.Started with the calculation method of IRI,the quarter-car model was established to analyze the inputs of road roughness and the outputs of auto vibration.By using the relationship between IRI and standard deviation of road roughness,measured IRI and calculated roughness standard deviation were introduced to simulate the road roughness.Then based on periodic chart,Fourier inverse transformation method and power spectral density function,one derivation method which can gain road roughness was presented.Finally an example was given and the numerical analysis result demonstrates that the new method is effective.

关 键 词： 道路工程 路面不平度 数值模拟 功率谱密度 国际平整度指数 车辆动力学

领　　域： [交通运输工程]