State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China;
State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China;
State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China;
CRRC Tangshan Co. Ltd. Tangshan 063000 China;
State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China;
high-speed freight train; bogie group; transition frame; track irregularities; dynamic performance;