车辆引起的地面振动衰减计算方法
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TU435; U461.1; X593

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Calculation Method of Vehicle-Induced Ground Vibration Attenuation
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    摘要:

    首先,利用MATLAB求解考虑路面不平度影响的车辆振动微分方程;然后,利用文克尔弹性地基梁模型模拟路面土体,建立车辆及所在地面的振动计算模型;最后,借助动力机械振动沿地面传播的衰减公式提出车辆通行引起构筑物基础加速度的计算公式,最终建立车辆引起地面振动衰减的计算方法,并用实测数据进行了验证,用算例对该方法的应用进行了说明。该方法物理意义明确,原理清晰,实用合理,简单方便,只要输入车辆和道路的基本信息利用MATLAB程序求解即可。

    Abstract:

    Vehicle-induced environment vibrations are generatedwhen the vehicle is moving on an uneven surface and various factors consequently pass from the pavement structure and soil structures to the vehicle′s structural foundation and upper structure. The purpose of analyzing the impact of vehicle vibration on the environment is to get the vibration response where the structure is located under vehicle excitation. Firstly, a vehicle vibration differential equation that considers road roughness is solved by MATLAB. Secondly, a vibration calculated model of vehicle and the ground can be built using the Winkler elastic foundation beam model to simulate the soil of the road. Finally, with the dynamic mechanical vibration attenuation formula spread along the ground, the calculation formula of structure foundation acceleration caused by vehicles is proposed, and the calculation method of vehicle-induced ground vibration attenuation is built. It is validated with experimental data, and its application is illustrated with a numerical example. This method has clear physical meanings and principles that aresimple, practical, reasonableand convenient. It can be solved when basic information about the vehicle and road is inputted into MATLAB.

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  • 在线发布日期: 2015-05-30
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