Calculation issues for reinforcing rings in pressure vessel design
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I would like to ask the experienced colleagues: Figure 1 shows the standard for calculating reinforcement rings at 150; Figure 2 presents the design conditions given in the calculation sheet; Figure 3 asks how Ls is calculated How is the moment of inertia of the reinforcement ring determined? Based on that formula, how is the effective moment of inertia calculated?
Starting with the calculation of LS, first determine the external pressure calculation length for the entire device, as per Figure 4-1 in GB150; then consider adding several reinforcement rings to divide the total external pressure calculation length into several parts. Install reinforcing rings at the divided nodes. This results in the distance on either side of the reinforcement ring (the distance to each node respectively).
Then, calculate the required moment of inertia according to 4.5.1.4 in GB150.3.
The effective inertial moment of the reinforcing ring is calculated according to 4.5.1 of GB150.3.
Thank you for the guidance; I’m reading books to learn more
I calculated Is using GB150.3, 4.5.1.1: 0.55 times the diameter multiplied by the effective thickness, which gave me 43.78. How was the value of 193115 obtained in the calculation sheet? Please advise :(
I was too careless while reading the text; 0.55 times the diameter multiplied by the effective thickness gives the width of the effective portion of the cylinder. It’s impossible to compare this width value with the moment of inertia Is – they will never be equal.
Are there any recommended books on the design of pressure vessels? It would be ideal if the books contain examples and explanations. Thank you~
Those with standard names also include GB150－2011 “Answers to Questions and Examples”