铁路道床路基动力响应的参数影响

基金项目:

铁道部科技研究开发计划项目 2000G047-E

Dynamic response parameters of railway ballast-subgrade

School of Civil and Archetecture Engineering, Central South University, Changsha 410075, China

摘要: 根据车轮轨排道碴模型, 得到路基道碴表面荷载, 利用有限元无限元耦合法, 建立了道床路基动力计算模型。结合Newmark积分法逐步求解运动方程, 计算了列车荷载下, 不同道碴厚度与地基刚度下道床路基的振动加速度与动位移。计算结果表明, 道碴厚度对道床路基的动力响应影响显著, 而路基刚度的影响不明显。
- 铁道工程 /
- 道床路基 /
- 动力响应 /
- 有限元 /
- 无限元
Abstract: Load acted on the surface of ballast was obtained through the vehicle-rail-ballast model. Dynamic computational model for railway ballast-subgrade was established through a coupling of finite elements and infinite elements method. Under train loads, the vibration acceleration and dynamic displacement in ballast-subgrade, which are of different ballast thickness and subgrade stiffness, were obtained in conjunction with Newmark integration scheme. The computational results show that the ballast thickness has evident impact on the dynamic response of subgrade, but the subgrade's impact is not as evident as the ballast thickness's impact.
- railway engineering /
- ballast-subgrade /
- dynamic response /
- finite element /
- infinite element

图 1 八节点有限元

Figure 1. 8-node finite element

下载: 全尺寸图片幻灯片

图 2 七节点无限元

Figure 2. 7-node infinite element

下载: 全尺寸图片幻灯片

图 3 道床-路基加速度、动位移时程曲线

Figure 3. Acceleration and dynamic displacement in ballast-subgrade

下载: 全尺寸图片幻灯片

图 4 道床-路基计算模型

Figure 4. Calculation model of ballast-subgrade

下载: 全尺寸图片幻灯片

图 5 加速度与道碴厚度关系

Figure 5. Acceleration in different ballast thickness

下载: 全尺寸图片幻灯片

图 6 动位移与道碴厚度关系

Figure 6. Dynamic displacement in different ballast thickness

下载: 全尺寸图片幻灯片

图 7 加速度与地基刚度关系

Figure 7. Acceleration in different subgrade stiffness

下载: 全尺寸图片幻灯片

图 8 动位移与地基刚度关系

Figure 8. Dynamic displacement in different subgrade stiffness

下载: 全尺寸图片幻灯片

表 1 道床路基材料性质参数

Table 1. Parameters of ballast-subgrade

下载: 导出CSV

[1]	翟婉明. 车辆-轨道耦合动力学[M]. 北京: 中国铁道出版社, 1997.
[2]	雷晓燕. 铁路轨道结构数值分析方法[M]. 北京: 中国铁道出版社, 1998.
[3]	CHEN Shui-sheng, LEI Xiao-yan. Space dynamic response analysis on track structure[J]. Journal of East China Jiaotong University, 1999, 16(1): 6-14. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GHLJ202104003.htm
[4]	丁浩江. 弹性和塑性力学的有限元方法[M]. 北京: 机械工业出版社, 1984.
[5]	DUAN Ke-rang, CAI De-suo. Dam stresses analysis by coupling the method of finite and infinite element[J]. Journal of Wuhan University of Hydr. and Elec. Engineering, 1996, 29(2): 49-53. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-WHDY202006001.htm
[6]	Bettess P. Infinite element[J]. Internation Journal for Numerical Methods in Engineering, 1977, 11(11): 53-64. https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB202009005.htm
[7]	Beer G, Meek J L. Infinite domain element[J]. Internation Journal for Numerical Methods in Engineering, 1981, 17(17): 43-52. https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB202009005.htm
[8]	朱伯芳. 有限元法原理与应用[M]. 北京: 中国水利水电出版社, 1998.
[9]	Kerr A D. 轨道力学与轨道工程(中译本)[M]. 北京: 中国铁道出版社, 1988.