摘要
利用有限元法建立了包含钢轨、轨枕、弹性垫层、道床和路基为一体的轨道结构空间分析模型。机车和车辆对轨道的作用通过轮对模型求得。在轮对模型中 ,只考虑一系弹簧 ,车体总质量平均分配到每个轮对上 ,轨道结构则处理成双层弹性梁。在对高速铁路轨道结构进行空间分析时 ,首先利用轮对模型得到随时间变化的作用在各轨枕上的荷载谱 ,以此作为轨道结构空间分析模型的输入。文章对 TGV动车在不同速度下对轨道结构的动力响应进行了分析。
In this paper ,a space model for analyzing track structure is established by means of finite element method, in which rails, sleepers, elastic pads, ballast and underground foundation are considered as a whole body. The action of locomotive and rolling stocks on track can be obtained from wheel set model. In the wheel set model, only one set of sprung springs are concerned and the masses of locomotive or rolling stock are uniformly distributed to each wheel set. The track structures are treated as a double elastic beam. In the process of performing the space analyses for track structure of high speed railway, the load spectrum changing with the time and acting on the sleepers are derived firstly by using the wheel set model. Then, the load spectrum is entered to the model of space analysis for track structure as input data. Finally, analyses of dynamic response of track structure for TGV under different speeds are performed.
出处
《铁道学报》
EI
CSCD
北大核心
2000年第5期76-80,共5页
Journal of the China Railway Society
基金
铁道部科技研究开发计划项目! ( 97G0 6A)
