[1]School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
[1]School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
[1]School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
[2]China Railway Design Corporation, Tianjin 300142, China;
high-speed railway; station yard; straight line; turnout; dynamic theory; length optimization;