Calculation of deflection of the circular flat cover on the top of a pressure vessel at atmospheric pressure
Thread Content
For atmospheric pressure cylindrical vessels with a circular flat top, the top itself is not under pressure; however, it seems that the issue of deflection of this flat top should be taken into consideration during design. May I ask everyone, how should the deflection of a circular flat top be calculated? How is the corresponding allowable deflection determined?
Reference should be made to 6.4 in NB/T47003.1
What does the poster mean by a flat cover that is not under pressure? Is the pressure inside the container exactly the same as atmospheric pressure?
Yes, the internal pressure is exactly the same as atmospheric pressure; only the deflection under its own weight needs to be considered
The deflection caused by self-weight is estimated to be negligible; this can be determined through finite element calculations
Finite element methods are too complicated; I want to use an analytical solution to get a quick calculation
Refer to the static calculation manual for structures regarding the calculations of plates