%0 Journal Article
%T 随机车流作用下大跨度悬索桥振动分析
%A 殷新锋
%A 丰锦铭
%A 刘扬
%A 蔡春声
%J 湖南大学学报(自然科学版)
%D 2017
%X 引入元胞自动机随机车流模拟方法，采用已建立的能考虑车辆空间振动的18个自由度整车模型模拟车流中重型车辆，利用单自由度车辆模型模拟车流中其他车型，模拟了能考虑邻近车辆对车流的影响桥上随机车流模型．通过车轮与桥面间的变形与接触力协调关系，建立了桥梁与车流耦合作用下运动方程．分析表明：车流中相邻车辆是否考虑对桥梁振动位移的影响较大，且随机车流作用下引起的悬索桥主梁及索塔的空间振动不能被忽视.</br>A cellular Automaton (CA) model was introduced to simulate stochastic traffic, an 18 degrees-of-freedoms (DOFs) vehicle model was used to simulate a heavy truck, and a single DOF vehicle model was used to simulate other typed vehicles in traffic. The simulating stochastic traffic can be improved by considering the influence of the nearest neighbor vehicle. The coupled equations of bridge and vehicles in traffic flows were established by combining the equations of the motion of both the bridge and vehicles using the displacement relationship and interaction force relationship. The simulations show that the effect of considering the nearest neighbor vehicles on the maximal vertical displacement of bridge is significant, and the dynamic vibration of the main beam and tower under stochastic traffic flows cannot be neglected.
%K 桥梁 振动 车流 桥面不平整度&lt
%K /br&gt
%K bridge vibration traffic bridge road surface
%U http://hdxbzkb.cnjournals.net/ch/reader/view_abstract.aspx?file_no=20170107&flag=1