Research Article
Research on the Simulation Method for Equivalent Stiffness of Bolted Connection Thin Plate Structures
Table 5
Nonlinear parameters of bolted beam structures under different excitation forces and bolt preloads.
| Bolt preloads (KN) | Excitation force (N) | First-order peak frequency (Hz) | Displacement amplitude (m) | Damping coefficient C (Ns/m) | Cubic item stiffness (N/m3) |
| 1 | 10 | 20.921 | 0.01516 | 0.0414 | | 12.5 | 20.914 | 0.02384 | 0.0329 | | 15 | 20.907 | 0.02701 | 0.0348 | |
| 2.5 | 10 | 20.816 | 0.01338 | 0.0476 | | 12.5 | 20.807 | 0.02223 | 0.0355 | | 15 | 20.798 | 0.03323 | 0.0285 | |
| 5 | 10 | 20.763 | 0.01425 | 0.0448 | | 12.5 | 20.755 | 0.02138 | 0.0373 | | 15 | 20.747 | 0.03325 | 0.0288 | |
| 10 | 10 | 20.526 | 0.02157 | 0.0396 | | 12.5 | 20.520 | 0.02837 | 0.0281 | | 15 | 20.514 | 0.03333 | 0.0287 | |
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