How should reinforcement design be carried out when there are large openings on the pressure vessel head?
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Dear marine engineers, these are the examination questions from October 2015: How should reinforcement design be carried out when there are large openings on the head of a pressure vessel? Please answer, thank you! ! !
The analysis method can no longer be used; do we have to use local stress analysis?
I think the limited capacity analysis method is the only option. . Seeking help from experts. . . .
Avoid the transition zone; carry out normal reinforcement calculations for the openings, either using reinforcement rings or a holistic approach. If the openings are too large, use analytical methods or stress analysis.
This post was last edited by zjq1962 on 2019-1-9 09:49. Let me throw out some ideas to stimulate discussion. Due to the local film stress at the edges of large openings, both bending stress and peak stress are high, so this must be taken into account in structural design. 1. Do not install it in the transition area of the head to avoid the accumulation of high stresses ； 2. Adopt an integral reinforcement structure; 3. Control the yield strength ratio of the material; 4. Round the inner edge at the pipe end. 5. The minimum tensile strength of the material shall not be greater than 540 MPa. 6. Increase requirements for non-destructive testing.