论文部分内容阅读
车桥耦合问题一直是工程界十分关心的问题,从最初的试验取得到目前的数值计算,已有不少理论成果,但目前众多的数值分析方法大多需编制专用的分析程序来求解,而且仅限于简单桥梁。最近几十年,结构复杂且轻型化的桥梁大量涌现,再加上汽车荷载的复杂性和不确定性,车桥耦合振动分析变得更加复杂和困难。本文建立了车桥耦合振动的力学分析模型,把桥梁和车辆视作两个分离体系,分别应用广义虚功原理和有限元法推导了两者的振动方程组,并给出了位移联系方程及车桥相互作用协调方程;提出了基于ANSYS来实现公路桥梁车桥耦合振动分析方法,并通过算例分析表明,本文方法仅经三次迭代即可获得较高精度及可靠的数值结果,从而为公路复杂桥梁动力性能评价提供了一种简便且可靠的数值分析方法。
Axle coupling has always been a concern in the engineering field. There are many theoretical achievements from the initial experiments to the present numerical calculation. However, most numerical analysis methods nowadays require special analytical procedures to be solved and only Limited to simple bridges. In recent decades, a large number of structurally complicated and light-weight bridges have emerged. Coupled with the complexity and uncertainty of vehicle loads, the vibration analysis of the bridge-coupled vibration has become more complicated and difficult. In this paper, the mechanical analysis model of the coupled vibration of the bridge and the vehicle is established, and the bridge and the vehicle are regarded as two separate systems. The vibration equations of the two are deduced by generalized virtual work principle and finite element method respectively. And the coordination equation of the bridge interaction is put forward. Based on ANSYS, a method to analyze the coupling vibration of highway bridges and bridges is proposed. The calculation results show that this method can obtain high precision and reliable numerical results with only three iterations, Complex bridge dynamic performance evaluation provides a simple and reliable numerical analysis method.