School of Mechanical Engineering Southwest Jiaotong University Chengdu China;
State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu China;
School of Mechanical Engineering Southwest Jiaotong University Chengdu China;
School of Mechanical Engineering Southwest Jiaotong University Chengdu China;
Liquid-filled pipe; Frequency dispersion characteristics; Leak location; Time delay estimation value;