Abstract
Axle is the main bearing part of the bogie system on a high-speed train and is therefore requested on a higher reliability level. The high-speed train axle is thick-walled hollow cylindrical structure with variable cross section, which complicates ultrasonic guided wave propagation in the structure. Characteristics of the guided wave propagation in the train axle are systematically investigated in this study, so as to explore guided wave-based structural health monitoring (SHM) method for this kind of structure. Piezoelectric patches are used as actuator to excite waves in the axle. Generated wave signals using single actuator and circumferential, limited number of actuator configurations are compared to optimize the transducer network. The longitudinal wave modes are therefore selected for damage detection of this kind of structure. Based on the analytical and finite element analysis (FEA), when the symmetric longitudinal wave modes meet defect, if have, in the train axle with variable cross section, mode conversion will happen and asymmetric flexural wave modes are therefore generated. Wave mode conversion-based SHM technique is consequently proposed. The FEA results demonstrate the feasibility of guided wave-based SHM technique for high-speed train axle.
| Original language | English |
|---|---|
| Pages (from-to) | 1133-1147 |
| Number of pages | 15 |
| Journal | Structural Control and Health Monitoring |
| Volume | 22 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 Jan 2015 |
Keywords
- damage detection
- guided waves
- high-speed train axle
- mode conversion
- structural health monitoring
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Mechanics of Materials