3种车桥耦合振动分析模型的比较研究

应用达朗贝尔原理和欧拉-贝努利梁假设，推导了简支梁在移动质量、四分之一车模型和二分之一车模型3种不同车辆模型下的车桥耦合振动方程，比较了在不同速度下的桥梁动态响应，结果表明，3种车辆模型都可以反映出在移动荷载作用下车桥耦合振动的总体规律，但考虑车体弹簧和阻尼的影响能更充分体现车桥耦合效应。

Comparison of Three Models for Vehicle-Bridge Coupled Vibration Analysis

Three models for vehicle-bridge coupled vibrations, namely moving mass model, two-degree-of freedom vehicle model and four-degree-of freedom vehicle model, were derived using the D'Alembert's principle and the hypothesis of Euler-Bernulli beam. The dynamic responses of bridges to the vehicle moving at different speeds were analyzed with the models. The results show that all the three models can reasonably determine the bridge vibrations under moving loads. However, more accurate results can be obtained with the last two models taking the springs and damping properties of vehicles into accunt.