Abstract
The ultrasonic test probe with the frequency of 1MHz is optimal by analyzing viscoelastic property of material of solid rocket motor grain. The double-probe pulse echo method, combining the advantages of transmission technique and pulse reflection method, is used to optimize the ultrasonic echo signal amplitude in case of strong attenuation of energy when ultrasonic signal transmitting in solid rocket motor grain. The linear and quantitative nondestructive test of the grain defect is realized by using time-frequency domain character of the ultrasonic defect signal.
| Original language | English |
|---|---|
| Pages (from-to) | 610-615 |
| Number of pages | 6 |
| Journal | Zhongbei Daxue Xuebao (Ziran Kexue Ban)/Journal of North University of China (Natural Science Edition) |
| Volume | 30 |
| Issue number | 6 |
| Publication status | Published - Dec 2009 |
Keywords
- Grain
- Pulse reflection method
- Time-frequency domain character