Research Article
An Improved Model of Variable Fuzzy Sets with Normal Membership Function for Crane Safety Evaluation
Table 4
Safety level for metal structure safety assessment of a port crane.
| Safety level | Crack (C1) | Strength (C2) | Stiffness (C3) | Deformation (C4) | Corrosion (C5) |
| Very good I | 0.9–1 | 0.6–1 | 0.8–1 | 0.8–1 | 0.8–1 | Good II | 0.8–0.9 | 0.4–0.6 | 0.6–0.8 | 0.6–0.8 | 0.6–0.8 | Fair III | 0.7–0.8 | 0.25–0.4 | 0.4–0.6 | 0.4–0.6 | 0.4–0.6 | Poor IV | 0.5–0.7 | 0.15–0.25 | 0.2–0.4 | 0.2–0.4 | 0.2–0.4 | Very poor V | 0–0.5 | 0–0.15 | 0–0.2 | 0–0.2 | 0–0.2 |
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