中文摘要：

以蠕滑理论建立横向轮轨关系的车桥动力相互作用模型,以典型高速铁路车辆通过32 m简支梁桥作为算例,研究不同车速和桥梁刚度时车桥动力耦合系统中的实际轮对蛇形运动.采用按轮轨密贴假定建立的另一种以轮对蛇形为激励的车桥动力分析模型,以蠕滑理论求出的轮对蛇形运动作为激励,与不考虑轮对蛇形运动激励时的车桥动力响应结果进行比较.结果表明,在分析桥梁动力响应时可忽略轮对蛇形运动的影响,而分析车辆动力响应时则应加以考虑.

英文摘要：

A vehicle-bridge dynamic interaction model is established,in which the lateral wheel-rail interaction is defined by the creep theory.Then the wheelset hunting movement is calculated in the cases of a typical high speed train passing 32 m simply supported beam bridge.Another vehicle-bridge dynamic interaction model is established with the wheel-rail osculation assumption in lateral dynamic interaction,and the vehicle-bridge system dynamic responses with the lateral excitation of wheel-set hunting and without wheel-set hunting excitation are calculated and compared.The results show that the wheel-set hunting movement can be neglected when analyzing the bridge response,but it should be considered when analyzing the vehicle response.