蛇行波长取值方式对钢板梁桥横向振动的影响

Influence of Input Hunting Wavelength to Lateral Vibration of Deck Steel Plate Bridges

随着我国既有线路的大规模提速,铁路货车提速后上承式钢板梁桥横向振幅超限现象日益突出,严重影响货车进一步提速.以轮对随机人工蛇行波为激励,就不同的蛇行波长取值方式对铁路钢板梁桥横向振动的影响进行了探讨.最后指出,20辆车各个轮对蛇行波波长均不同、轮对蛇行波波长随机选取时各速度对应的桥梁横向最大位移小于轮对蛇行波波长均相同时相应速度对应的桥梁横向最大位移值.

With the acceleration of trains on existing railway lines in China, the problem that heavy lateral response amplitude exceeding the anticipation value under the accelerated freight train on some deck steel plate bridges becomes extra important. In this paper, num- bers of analysis are made for the influences of various inputs hunting wavelength to the lateral vibration of the deck steel plate bridges. The result shows that the lateral displacement when hunting waves for every wheels are different and when hunting waves are random, the lateral displacement is little than they are the same.