中国铁道科学2017，Vol.38Issue(4)：15-23,9.DOI:10.3969/j.issn.1001-4632.2017.04.03
基于剪力铰的浮置板轨道减振性能优化分析
Optimum Analysis of Vibration Reduction Performance for Floating Slab Track Based on Shear Hinge
摘要
Abstract
A bending-shearing spring damper element is introduced to simulate the restraint effect of shear hinge on the end displacement of floating slab.The model of train and steel spring floating slab track under the condition of shear hinge connection is established accordingly.Modal expansion method and Newrnark-β method are adopted to calculate the dynamic responses of train-floating slab track system.The influence of shear hinge on the vibration reduction effect of train-track system is investigated.Through analyzing the train-track dynamic responses under different combinations of shear hinge parameters,the optimization for the combinations of shear hinge parameters is carried out.Results show that,the train-track dynamic responses at slab ends are obviously larger than other positions without the restraint of shear hinge.The rail displacement amplitude at slab ends is 57.6％ larger than other positions,which has a negative impact on the long-term operation of the train and passenger comfort.Setting the shear hinge at the ends of floating slab can reduce the discontinuity of the overall track stiffness at slab ends,thus the train-track dynamic response can be reduced.The bending stiffness of shear hinge can effectively improve the overall stiffness of floating slab track,while the shear stiffness can effectively reduce the displacement difference of slab ends.The optimal combination of the shear hinge parameters in the magnitude range of 105～ 1012 is obtained based on the statistical analysis of response amplitude,i.e.,the bending stiffness and shear stiffness is 5 000 MN · rad-1 and 5 000 MN · m-1 respectively.关键词
轨道/浮置板/减振/剪力铰/弯剪弹簧阻尼单元Key words
Track/Floating slab/Vibration reduction/Shear hinge/Bending-shearing spring damper element分类
交通工程引用本文复制引用
蒋吉清,王永安,魏纲,魏新江,丁智..基于剪力铰的浮置板轨道减振性能优化分析[J].中国铁道科学,2017,38(4):15-23,9.基金项目
国家自然科学基金资助项目(51508506) （51508506）
浙江省自然科学基金资助项目(LY17E080005,LQ16E080008) （LY17E080005,LQ16E080008）
杭州市科技计划项目(20160533B94) （20160533B94）
