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| Study on the Calculation Method of Reverse Flanges for Cast Iron Drying Cylinders under Additional Bending Moment Conditions |
| Received:May 20, 2025 Revised:June 06, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.11.025 |
| Key Words:cast iron drying cylinders reverse flanges additional bending moments |
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| Abstract:During the operation of cast iron drying cylinders， due to the existence of support reaction forces at both ends， additional bending moments are generated at the connection between the end cover and the reverse flange on the cylinder body. Traditionally， the Waters method is commonly employed for flange connection design， yet this method doesn’t take into account the influence of the additional bending moments. This study， based on the reverse flange calculation methods specified in the American ASME standard and the British PD5500 standard， introduced the factor of additional bending moments to improve the calculation formulas. Subsequently， the correctness of the improved formulas was verified through finite element simulation. The results showed that after incorporating the additional bending moments， the calculation accuracy of the three principal stresses all increased by more than 30% (SH increased by 32.6%, SR increased by 40.2%, and ST increased by 40.4%). The additional bending moments had a significant impact on the safety of the flange connection. |
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