Research Article
Parametric Study on the Influence of Warping Deformation upon Natural Frequencies of Die Springs
Table 2
Comparison of the first five frequencies of the spring.
| Mode number (Hz) | FEM | Present study (PS) | Warping ignored | Errors (%) | Warping included | Errors (%) |
| 1 | 521.34 | 745.84 | 43.06 | 523.25 | 0.37 | 2 | 899.54 | 1009.30 | 12.20 | 897.71 | 0.20 | 3 | 915.97 | 1044.17 | 13.99 | 914.36 | 0.17 | 4 | 970.21 | 1122.22 | 15.67 | 973.88 | 0.38 | 5 | 1129.5 | 1338.65 | 18.52 | 1118.41 | 0.98 |
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