轮对蛇行波长对铁路钢板梁桥横向振动的影响

针对我国铁路货车提速过程中出现的铁路上承钢板梁横向振幅严重超限现象，以轮对随机人工蛇行波为激励，就不同的蛇行波长对铁路钢板梁桥横向振动的影响进行了探讨。结果表明，在同一速度下，桥梁发生的横向振动位移与轮对的蛇行波波长有关，当轮对的蛇形波波长在7～10m范围内并且激振频率（即行车速度与蛇行波长的比值）与桥梁横向有载自振频率接近时．桥梁横向位移达到最大。

Influence of Hunting Wave to Lateral Vibration of Deck Steel Plate Bridges

Since the speeds of the train are raised, the results of field tests of some deck steel plane bndges have shown heavy lateral response amplitude exceeding the anticipation value under the freight train. In this paper, numbers of analysis are carried out for the influence of hunting wave on the lateral vibration of the deck steel plate bridges under input of random artificial hunting waves. The result shows that the lateral vibration response is related to the length of hunting waves. When the length of hunting waves is about 7 - 10 m and the frequency of hunting motion is very close to loaded frequency of the girder, the lateral vibration response reaches a maximum.