湖南大学学报（自然科学版）Issue(1)：53-60,8.
轨道不平顺短波分量对列车简支梁桥耦合振动的影响
Effect of Short-wavelength Components in Rail Irregularity on the Coupled Dynamic Responses of Train and Simple-supported Bridge
摘要
Abstract
As an important excitation source,track irregularities have a significant effect on the running safety and riding comfort of the high-speed train and bridge.A three-dimension train-track-bridge coupled dynamic model was established to study the effect of short-wavelength components of track irregularities on the dynamic responses of the train and 32 m simple supported box-girder bridge.Five different wave-length track irregularities were generated from German low interference track spectra in numerical method. The dynamic responses of train-track-bridge coupled system under different track irregularities were calcu-lated.The results have shown that the 1 m short-wavelength component in track irregularities can signifi-cantly amplify the wheel-rail force,offload coefficient,derailment coefficient and the mid-span acceleration of the bridge.The mid-span displacement of the bridge,the wheel-rail relative lateral displacement and the car-body acceleration are less affected by the short-wavelength component of track irregularities.The main reason for the offload coefficient exceeding the code limits is 1~2 m short-wavelength components of track irregularities.The reduction of the short wavelength track irregularities component is effective in increas-ing the running safety.关键词
高速铁路/轨道不平顺/动力响应/车桥耦合系统/轮重减载率Key words
high-speed railway/track irregularity/dynamic response/train-bridge coupled system/the offload coefficient分类
交通工程引用本文复制引用
朱志辉,王力东,杨乐,余志武..轨道不平顺短波分量对列车简支梁桥耦合振动的影响[J].湖南大学学报（自然科学版）,2016,(1):53-60,8.基金项目
国家自然科学基金资助项目（51378511，50808177），National Natural Science Foundation of China（51378511，50808177）；湖南省自然科学基金资助项目（13JJ5007）；湖南省高校创新平台开放基金资助项目（13K006）；牵引动力国家重点实验室开放课题资助项目 （）
