Research Article
Stability Analysis of Multispan Pipeline Embedded in Temperature-Dependent Matrix
Table 3
Instability modes and critical points under different span combinations.
| Span combination | Instability mode (U m/s) | Instability mode (p N/m2) |
| L1 = 10 m, L2 = 10 m | 1st order divergence instability 252 | 1st order divergence instability 5.1 × 107 | 1st and 2nd order divergence instability 344 | 1st and 2nd order divergence instability 9.3 × 107 |
| L1 = 12 m, L2 = 8 m | 1st order divergence instability 252 | 1st order divergence instability 5.05 × 107 | 1st and 2nd order coupling divergence instability 348 | 1st and 2nd order divergence instability 9.65 × 107 |
| L1 = 16 m, L2 = 4 m | 1st order divergence instability 248 | 1st order divergence instability 4.9 × 107 | 1st and 2nd order coupling flutter instability 332 | 1st and 2nd order divergence instability 9.05 × 107 |
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