重载车辆-简支梁桥耦合振动影响参数分析

Analysis of influence parameters in coupled vibration of vehicle-bridge for heavy vehicles driving through simply supported beam

文章针对公路桥梁的车桥耦合振动响应问题,提出基于ANSYS单一环境下的车桥耦合振动响应数值分析方法。该方法将桥梁与车辆模型均独立建立于ANSYS环境下,其耦合作用关系通过APDL编程语言计算并将其在任意时刻施加于车辆及桥梁结构,最终得到振动的时程响应。通过与相关文献的对比验证,发现该方法正确可行,适用于复杂行驶工况的计算,易于工程人员操作。利用该算法研究了当车辆上桥速度、出桥速度变化时,车辆匀变速行驶通过简支梁桥时的车桥耦合振动响应,以及当桥面出现局部凹陷时,凹陷位置、车辆行驶速度变化时的车桥耦合振动特性。

Aiming at the response of vehicle-bridge coupled vibration of highway bridge,this paper presents a vehicle-bridge coupled vibration numerical analysis method based on ANSYS.By this method,the bridge model and vehicle model are established in ANSYS environment separately and their coupled vibration relationship is calculated by APDL language and imposed on vehicles and bridge structures at any time to get the schedule response of the vibration.Through the comparison and verification with related literature,this method is proved to be correct and feasible for the calculation of complex driving conditions and it is easy to operate.Based on this method,the paper analyzes the response of vehicle-bridge coupled vibration when the vehicle is traveling through the simply supported beam bridge in uniform or nonuniform speed and its motion speed on and out the bridge changes,and the characteristics of vehicle-bridge coupled vibration for the changes of local depression position on the bridge deck and the vehicles＇s motion speed.