摘要
轨道不平顺是引起车辆、轨道及桥梁结构产生振动的主要激励源.建立了车辆-轨道-桥梁耦合系统模型,采用新型显式积分法对系统方程进行求解,研究了复合轨道不平顺对系统动力学性能的影响.结果表明复合轨道不平顺的情况相比单一轨道不平顺对车辆运行安全性、平稳性及桥梁运营安全性的影响有的增大了有的却减小了.由此可得,复合轨道不平顺对系统的影响不是单一轨道不平顺影响的简单叠加或相减,需深入研究激励的类型和作用情况.
Track irregularity is the main sources to induce the vibration of vehicle, track and bridge structure. The model of vehicle--track--bridge coupled system was established. The integrated equations were solved by new explicit integration method to investigate the influence of composite track irregularities on the dynamics system. The results show that some of the safety for vehicle and bridge, the running smoothness for vehicle increase but some reduce when compared with the cases of composite track irregularities and the cases of single track irregularity. Thus the conclusion that the influence of composite track irregularities is not the same as the sum or subtraction of the influence of single track irregularity can be obtained. And that effect can be known clearly by investigating the type of excitation and the specific circumstances.
出处
《力学季刊》
CSCD
北大核心
2013年第4期599-606,共8页
Chinese Quarterly of Mechanics
基金
国家自然科学基金(11172192)
浙江省重点项目"近海冲击与安全"开放课题(zj1107)
关键词
轨道不平顺
车辆-轨道-桥梁耦合系统
新型显式积分法
track irregularity
vehicle--track--bridge coupling system
new explicit integration method
