地震工程学报2017，Vol.39Issue(2)：205-212,8.DOI:10.3969/j.issn.1000-0844.2017.02.0205
大跨度简支钢桁梁桥车-桥耦合振动影响因素分析
Analysis of the Influencing Factors of Train-bridge Coupled Vibrationof a Large-span Simply-supported Steel Truss Railway Bridge
摘要
Abstract
With the rapid development of rail transportation in China, high-speed and heavy-load railways have become the trend of development in this field.In such systems, it is important to consider the interaction process between the train and the bridge, along with the influential factors, when a train passes through a bridge.In this paper, a 156-m long simply-supported steel truss bridge of the Huang Han-hou New Yellow River Railway is taken as an example.A dynamic model of the train-bridge was constructed considering a wheel-rail relationship.Serpentine movements and track irregularity were used as self-excited excitation sources of the train-bridge system.The finite element software ANSYS and UM (Universal Mechanism) were used to simulate the train-bridge coupled vibrations.The influence of the bridge structure of the portal frame, wide-span ratio, curve of the steel truss and track irregularity, as well as the marshaling coaches on the train-bridge coupled vibrations were discussed with the numerical simulations.The results showed that the gantry of the steel truss bridge had greater influence on the acceleration.As the line radius of the curved steel truss bridge increased, the dynamic responses of the train became smaller, thus affecting wheel-rail force.Moreover, with increasing wide-span ratio, the lateral stiffness of the bridge increases, and the bridge lateral vibration became smaller.When the track conditions became worse, the dynamic responses of the train increased considerably and the comfortable and stability worsened.The findings indicate that the full empty grouping and empty-weight mixed grouping schemes are harmful to the coupled system of a train-bridge, which should be avoided in practical operation.关键词
大跨度钢桁梁桥/车-桥耦合振动/影响因素分析/数值模拟Key words
the long-span steel truss bridge/train-bridge coupled vibration/influence factors/numerical simulation分类
交通工程引用本文复制引用
陈敦,王根会,穆彦虎,彭惠..大跨度简支钢桁梁桥车-桥耦合振动影响因素分析[J].地震工程学报,2017,39(2):205-212,8.基金项目
国家自然科学基金(41401077,41630636) （41401077,41630636）
中国科学院西部之光"西部博士"项目(51Y351211) （51Y351211）
