Research Article
Experimental Study on the Boundary Reflection Effect of Stress Wave Propagation Based on the Newly Developed Test Apparatus
Table 3
The measured wave impedance values of boundary materials.
| Materials | Size (mm) | Wave speed (m/s) | Density (kg/m3) | Wave impedance (106 kg/m2·s) |
| 1# pine pad | 120 × 120 × 100 | 5,630.02 | 588.80 | 3.31 | 2# pine pad | 120 × 120 × 100 | 5,537.55 | 601.37 | 3.33 | 3# pine pad | 120 × 120 × 80 | 5,075.34 | 435.80 | 2.21 | 4# pine pad | 120 × 120 × 80 | 4,161.74 | 455.18 | 1.89 | Rubber pad | 120 × 120 × 10 | 235 | 1,490 | 0.35 | Steel pad | 120 × 120 × 10 | 5,200 | 7,900 | 41.08 |
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