中文摘要：

首先采用高速激光道路检测车对车辆左、右轮对应路面粗糙度进行同步实测，并选取两个典型粗糙度样本进行功率谱密度、自相关和互相关分析。然后，详细介绍多主梁车桥耦合振动分析模块的编制思路。最后，以一辆三轴重车通过刚架拱桥为工程实例，详细对比和分析分别采用左右轮实测路面粗糙度、同时采用左轮以及同时采用右轮实测路面粗糙度进行输入三种情况对车桥系统动力响应和频谱特性的影响。分析表明：当车辆左、右轮对应路面粗糙度互相关较好时，非一致激励输入计算得到的车桥系统响应基本位于后两种输入方法的计算响应之间，三种输入方式所对应的车轮竖向接触力以及车桥系统的频谱特性基本一致；而当两者之间互相关较差时，非一致激励输人计算得到的系统响应比后两种输入方法的计算响应都要小，三种输入方式所对应的车轮竖向接触力以及车桥系统的频谱特性存在一定差异。

英文摘要：

High speed laser roadway test vehicle is employed to simultaneously measure road roughness corresponding to left and right wheels, and two typical samples of roughness are selected to analyze their power spectral density, autocorrelation and cross-correlation. The programming scheme for a multi-girder vehicle-bridge coupling vibration analysis module is presented in details. Taking a three-axle truck moving on a rigid frame arch bridge as an example, the effects on the response and the spectrum characteristics of vehicle-bridge coupling vibration are analyzed and compared for three cases which include the inputs of inconsistent stimulus of left and fight wheels, measured road roughness of left wheels and right wheels. The analysis shows that when the cross-correlation of road roughness corresponding to left and fight wheels is high, the response of vehicle-bridge calculated using inconsistent stimulus input is between the responses of the latter two input methods, and the vertical contact force of wheels and the spectrum characteristics of vehicle-bridge system are essentially consistent with each other. When the cross-correlation is not high, the response of inconsistent stimulus input is smaller than any of the latter two input methods, and the differences between the vertical contact force of wheels and the spectrum characteristics of vehicle-bridge system are more somewhat obvious.